tls fallback scsv vulnerability fix

fi If you need to use the extension, then the following is an example of how to use it: Some folks on the OpenSSL mailing list recommend using TLS_FALLBACK_SCSV and SSL_MODE_SEND_FALLBACK_SCSV whenever available. We recently updated our anonymous product survey; wed welcome your feedback. Seems it an issue of libssl, not nginx configuration. EPEL, for instance, is broken for me right now. real case is remote host provide only ciphers which RHEL5 openssl (0.9.8e-31.el5_11) not support. The problem is independent of the library, it is on the protocol itself ( version 3 of SSL ), not the implementation ( openssl, gnutls ). Will an update be made so the poodle.sh script works on RHEL5? echo "SSL disabled or other error" The server side also needs to be patched to support SCSV extension, and does not need a rebuild with the patched crypto library. SSL disabled or other error. You are right Tomas, OpenSSL 1.0.1 users should upgrade to 1.0.1j. Please see this Article for a more detail explanation of POODLE. There is currently no fix for the vulnerability SSL 3.0 itself, as the issue is fundamental to the protocol; however, disabling SSL 3.0 support in system/application configurations is the most viable solution currently available. This means that all Windows Servers will be capped at an A rating until . The BIG-IP system now correctly handles all combinations of fallback SCSV and supported protocol versions. (Attacks remain possible if both parties allow SSL 3.0 but one of them is not updated to supportTLS_FALLBACK_SCSV, provided that the client implements a downgrade dance down to SSL 3.0.) The error message is, "ERROR_WINHTTP_SECURE_FAILURE while performing WinHttpSendRequestoperation.". How would you get a medieval economy to accept fiat currency? Please, refer to the table at the top of this article for a list of affected components (i.e. ulimit -t 5 Asked 8 years, 5 months ago Modified 8 years, 2 months ago Viewed 2k times 0 I can't get the TLS_FALLBACK_SCSV to work when testing on SSLabs, keeping me from an A+ rating. The system blocks all TLS 1.0 and 1.1 content. you can try: SSLv3 connections is established fine. I ran the "offline detection tool" on one of my RHEL 6 servers, and I received the following message: Reg. The Vulnerability from Cisco Switches need to remediate the same. Whatever default vhost listens on Apache will be the one that gets tested. Setup Microsoft Windows or IIS for SSL Perfect Forward Secrecy and TLS Keep your systems secure with Red Hat's specialized responses to security vulnerabilities. The modifications above will enable TLS 1.0 and TLS 1.1. So, this implies that you are only going to test this on the latest release of RHEL6? Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers. so to calculate the exposure and risk to our environment running RHEL, would it be safe to say only of httpd, firefox/Chromium are used, it is a risk, otherwise other packages that use OpenSSL e.g Openssh usage of libcrypto for example is not an issue? The PCA dialog states, This program might not have run correctly. Under that, there are two options: Run the program using compatibility settings. This situation can occur in three different ways, each of which results in a break in the chain below which certificates cannot be trusted. Fix FALLBACK_SCSV parsing #924 Is configuring every LDAP client to use stunnel really an efficient means to disable SSLv3? However, they wont enable TLS fallback. Access denied. There's a notice of 2014-10-15 about CVE-2014-3566. }, A U.S. Department of Energy National Laboratory Operated by the University of California, Commons contains user-contributed content and This includes web servers, SMTP servers, IMAP and POP servers, and any other software that supports SSL/TLS. More details are available in the upstream OpenSSL advisory. not only httpd and Firefox/Chromium are affected). SAN Volume Controller and Storwize Family has addressed the applicable CVEs . echo "SSL 3.0 enabled" The POODLE attack leverages the fact that when a secure connection attempt fails, servers will fall back to older protocols such as SSL 3.0. Hello, we just updated the script in this article. Detect Security Vulnerabilities in Your Web Apps and APIs Scan now for free Share The TLS Signaling Cipher Suite Value (SCSV) protects against TLS/SSL downgrade attacks such as POODLE. Doing so leaves only TLSv1.2 ciphers, which openssl 0.9.8e doesn't support. OpenSSL is used by SAN Volume Controller and Storwize Family. But the client immediately follows up with an ack and a fin/ack TCP request. Figure 1: Browser window when accessing TLS 1.0 and 1.1 webpage, After the update, applications based on winhttp might fail. It is FALSE by default. It is not fully efficient anyway (since existing SSL3.0 browsers would be affected - otherwise its support could be fully removed on server side): just in the light of Chrome promotion under TLS_FALLBACK_SCSV pretext. This cross-layer protocol attack leverages weaknesses in cipher block . RH script DOES offering checks of all ports. I want to remediate the following vulnerabilities from the Cisco Switches and ACS which are came after scan using Nessus. OpenSSL) or implements the SSL/TLS protocol suite itself. Vul2: SSL Certificate Chain Contains RSA Keys Less Than 2048 bits: At least one of the X.509 certificates sent by the remote host has a key that is shorter than 2048 bits. We do not recommend enabling TLS 1.1 and below because they are no longer considered secure. Hello: The TLS protocol ensures TLS 1.2 is used if available; and TLS 1.1 is used is TLS 1.2 is not available; and TLS 1.0 is used if TLS 1.2 and 1.1 are not available. Vul3: SSL / TLS Renegotiation Handshakes MiTM Plaintext Data Injection: The remote service encrypts traffic using TLS / SSL but allows a client to insecurely renegotiate the connection after the initial handshake. The Registry Editor adds the following entry to the path Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Compatibility Assistant\Store. Script checks all port in state LISTEN on host. Customers Also Viewed These Support Documents. https://access.redhat.com/labs/poodle/ Hello Bram, sorry for the late reply. exit 0 I just tested all the functionality in our SSLv3 (POODLE) Detector and it works as expected. If you do not supply the arguments, then 127.0.0.1:443 is used. One RHEL server, running one instance of Apache, and have several secured websites, each has their own secure .CONF file, and in each secure .CONF file defines: postfix and dovecote should also be affected and are not shown in the list. Official websites use .gov According to the SCSV RFC (7507): To open the Group Policy Editor, type gpedit.msc in the taskbar search box. By the way, what is the recommended value for "SSLCipherSuite" in general? The Overflow #186: Do large language models know what theyre talking about? An official website of the United States government. Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings. openssl-0.9.8e-27.el5_10.4.x86_64. echo "SSL disabled or other error" Tested and found our server is sslv3 enabled, have disabled sslv3 for apache in /etc/httpd/conf.d/ssl.conf.restarted apache. The only protection against the issue is to avoid use of SSL 3.0. I turned off SSL3 in the website's secure..conf file, restarted Apache, and then checked the website again, and this time the website was identified as "not vulnerable". The TLS Signaling Cipher Suite Value (SCSV) is protection against TLS/SSL downgrade attacks. 2) Server closes connection because it only supports TLS 1.3 The method is then used to create a context object. GitHub nabla-c0d3 / sslyze Public Notifications Issues Pull requests 1 Actions Projects Security Insights New issue FREAK (Factoring Attack on RSA-EXPORT Keys CVE-2015-0204) is a weakness in some implementations of SSL/TLS that may allow an attacker to decrypt secure communications between vulnerable clients and servers. You can also select Change settings from the dialog shown in Figure 1. 3) Client retries with TLS 1.1 handshake with fallback SCSV (see RFC 7507) fi The team is working on documenting everything AFAIK, but for now, the priority is on http related packages since there is a know attack for that, and while SSL v3 would also be insecure for others protocols, it may not be exploitable in practice. The fallback SCSV is sent to indicate that 1.1 is not the highest version the client supports. Solution: Consult the application's documentation to disable SSL 2.0 and 3.0. I will open a ticket if you can validate that its an isolated issue. Patech Support, I do not see that the patches are available yet from Red Hat as I type this, see https://access.redhat.com/security/cve/CVE-2014-3566, do you have a link for these patches from Red Hat? The "fix" for courier disables tls 1.1 and tls 1.2. Solution: Purchase or generate a proper certificate for this service. Here you can find SecureProtocols, which stores the value of the currently enabled protocols if you use the Group Policy Editor. if you get "SSL 3.0 enabled", that's an issue. POODLE affects older standards of encryption, specifically Secure Socket Layer (SSL) version 3. security - How do I patch/workaround SSLv3 POODLE vulnerability (CVE You do not have permission to remove this product association. Figure 7: Path to turn off encryption support in Group Policy Editor. POODLE stands for Padding Oracle On Downgraded Legacy Encryption. See Figure 9. -- Using fallback SCSV suites. Fix initially by @andreasag01; this commit isolates the bug fix and adds a non-regression test. The attack is not considered as serious as the Heartbleed and Shellshock attacks. -- Or is there any other reason for the failure ? Rather, it just avoids the defective protocol version. The POODLE attack takes advantage of the protocol version negotiation feature built into SSL/TLS to force the use of SSL 3.0 and then leverages this new vulnerability to decrypt select content within the SSL session. *SSLv3'; then After the context object is created, weak/wounded/broken protocols and options are removed by setting SSL_OP_NO_SSLv2, SSL_OP_NO_SSLv3 and SSL_OP_NO_COMPRESSION. Please, do not downgrade to SSLv2. You do not have permission to access the page you requested. Use these resources to familiarize yourself with the community: Reg. Any ideas of what else to check for? There does not appear to be a way to run courier with tls 1.1 or higher. OpenSSL has added support for TLS_FALLBACK_SCSV to their latest versions and recommend the following upgrades: [5]. $ ./poodle-detect.sh 127.0.0.1 444 Vul2: SSH Weak MAC Algorithms Enabled: The SSH server is configured to allow either MD5 or 96-bit MAC algorithms, both of which are considered weak. [root@Hostname ~]# if echo "${ret}" | grep -q 'Protocol. I'm currently configuring a Windows Server 2016 TP2 Server with IIS 10.0 with the goal to attain an A+ Rating. } Ask the app developer to make configuration changes in the app to remove dependency on TLS 1.1 and below. An enhanced version of the script is described at The server negotigates the same cipher suite as openssl: TLS_DHE_RSA_WITH_AES_128_CBC_SHA (0x0033). MitM attackers can decrypt a selected byte of a cipher text in as few as 256 tries if they are able to force a victim application to repeatedly send the same data over newly created SSL 3.0 connections. I know at application layer run the script and if "SSL 3.0 enabled" shows up disable in the corresponding application using the method(s) mentioned in Resolution. if [ -f ${FILE} ]; then To enable TLS fallback, you must set EnableInsecureTlsFallback to 1 in the registry under the paths below. Unfortunately, many website owners aren't aware of this. Again, due to current lack of support in most common web browsers, any changes server side will only be relevant when client based browsers support the more secure measures. Other fixes applied upstream in 0.9.8zc are not applicable to Red Hat Enterprise Linux 5 0.9.8e packages. A TLS service was found not support the TLS_FALLBACK_SCSV cipher suite value. This fallback mechanism allows clients to indicate to a server that they support newer SSL/TLS versions than those initially proposed. An attacker who can trigger a connection failure can then force the use of SSL 3.0 and attempt the new attack. CommonCryptoLib: TLS protocol versions and cipher suites A=0 Red Hat Product Security has been made aware of a vulnerability in the SSLv3 protocol, which has been assigned CVE-2014-3566 and commonly referred to as 'POODLE'. *0000'; then Note that if you use a third-party service to terminate SSL/TLS connections, then SSLv3 needs to be disabled by the service. As a Red Hat customer the easiest way to check vulnerability and confirm remediation is the Red Hat Access Lab: SSLv3 (POODLE) Detector. Hi Phil, it's not obvious to me from your comment whether you're running a single Apache web server with your multiple sites configured as VirtualHosts or multiple instances of Apache running each website. Microsoft has supported them since Windows XP and Windows Server 2003. The following are major vulnerabilities in TLS/SSL protocols. jarrellg@carpsyinfint01 ~ $, ret=$(echo Q | timeout 5 openssl s_client -connect "${1-hostname}:${2-443}" -ssl2 ) That script is lacking. The idea, as I understand it, is that if the client has tried and failed to negotiate a connection . Find answers to your questions by entering keywords or phrases in the Search bar above. Client request (through openssl lib) for TLSv1 will still using SSLv3? unknown error. SSL 3.0 enabled TLS vulnerabilities, attack vectors and effective mitigation techniques else else Even if it is technically no longer needed for a server supporting TLS . SSL disabled or other error. *SSLv3'; then, if echo "${ret}" | grep -q 'Cipher. These changes will be reflected after installing Windows updates released on or after September 20, 2022. Prepared by Red Hat script check only port 443. To answer your question, I believe the special bytes you mention are the SCSV, but this is sent by the client and handled by the server, so there is nothing to do on the client side. Not the answer you're looking for? In the event of suspicious behavior where a client attempts to fallback to an older version when newer versions are supported, the server will abort the connection. It doesn't use "timeout" and distinguishes between "error" and "sslv3 disabled". As long as the SSLv2 and SSLv3 protocol engines are disabled, it should be safe to leave SSLv3 ciphers in the cipher suite list, as POODLE is an attack on the SSLv3 protocol, not the ciphers. changetype: modify This article by Red Hat discusses POODLE and mitigation. This works only as long as the active attacker cannot break the handshake crypto immediately, and fix in real-time . display: none !important; Secure .gov websites use HTTPS Easy way out would be to do the following and then restart dirsrv: dn: cn=encryption,cn=config Use TLS 1.1 (with approved cipher suites) or higher instead. Below are some discussions that occurred on the OpenSSL and IETF mailing lists and around the web. Misleading was the inaccurate openssl error string "sslv3 alert handshake failure" which appears for SSLv3 and TLSv1 handshake errors. https://drownattack.com/drown-attack-paper.pdf, http://crypto.stackexchange.com/questions/12688/can-you-explain-bleichenbachers-cca-attack-on-pkcs1-v1-5, https://www.openssl.org/news/secadv/20160301.txt, https://github.com/nimia/public_drown_scanner, http://blog.cryptographyengineering.com/2016/03/attack-of-week-drown.html, https://blog.qualys.com/securitylabs/2016/03/01/drown-abuses-ssl-v2-to-attack-rsa-keys-and-tls, https://www.openssl.org/blog/blog/2016/03/01/an-openssl-users-guide-to-drown/, http://arstechnica.com/security/2016/03/more-than-13-million-https-websites-imperiled-by-new-decryption-attack/, More Details, Exactly how the DROWN attack works, Figure A) Servers that support SSLv2 connections. Better write "clean" scripts. Once you enable the policy in the Group Policy Editor, you cannot change it in Internet Options. We did some digging and found that timeout is in /usr/share/doc/bash-3.2/scripts How "wide" are absorption and emission lines? Important Enabling TLS 1.2 at the server or 1.3 at the client should allow them to communicate. Testing was with yum, with recent updates installed. Watch out for items related to security. Vul4: SSL Certificate Expiry: This plugin checks expiry dates of certificates associated with SSL- enabled services on the target and reports whether any have already expired. This use of TLS_FALLBACK_SCSV will ensure that SSL 3.0 is used only when a legacyimplementation is involved: attackers can no longer force a protocol downgrade. Other SSL 3.0 implementations are most likely also affected by POODLE. Conclusions from title-drafting and question-content assistance experiments Why do I get a handshake failure between TLS 1.0 client and SSL 3.0 server? openssl s_client -connect "${1-hostname}:${2-443}" -ssl3 127.0.0.1:443 - Not vulnerable. echo "SSL 3.0 disabled" Vul9: SSLv3 Padding Oracle On Downgraded Legacy Encryption Vulnerability (POODLE): The remote host is affected by a man-in-the-middle (MitM) information disclosure vulnerability known as POODLE. On the Advanced tab, scroll down in the Settings panel. RHEL5 openssl patch seems to be incomplete. The solution to this problem is that the browsers and servers should implement TLS_FALLBACK_SCSV which makes downgrade attacks impossible. ./x.sh: line 2: timeout: command not found SSLv3 Padding Oracle On Downgraded Legacy Encryption Vulnerability (POODLE) If someone want check other ports, can use my modification. However, the extension does not fix the underlying padding oracle. To add a protocol downgrade prevention mechanism on server side the keyword TLS_FALLBACK_SCSV may be added. Fixing SSL vulnerabilities - Berkeley Lab Commons Please note that the updates listed here do not actually FIX POODLE, they only use the TLS_FALLBACK_SCSV option to prevent triggering a fallback to SSLv3. It falls back to a lesser protocol by initiating a new connection with the down level protocol. Making statements based on opinion; back them up with references or personal experience. This cipher value was implemented by OpenSSL to protect against inappropriate downgrades to weaker encryption protocols such as TLSv1.0 and SSLv3. Vul10: SSL RC4 Cipher Suites Supported: The remote host supports the use of RC4 in one or more cipher suites. SeeUpdate to enable TLS 1.1 and TLS 1.2 as default secure protocols in WinHTTP in Windows. -- Is there any other handling that is needed at TLS 1.2 client to communicate with TLS 1.3 server ? When you close an application or it stops working, the Program Compatibility Assistant (PCA) dialog appears as shown in Figure 2. Do you plan to release comprehensive documentation on how to do this? Does it mean that there is no service running which can cause this vulnerability ? How do you force Yum to connect to a HTTPS repo using TLS? https://rhn.redhat.com/rhn/software/packages/details/Overview.do?pid=1011841, Just take a look into the changelog. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Security/POODLE (last edited 2019-12-09 09:11:16 by anonymous). New here? Could you please provide any details on what the issue is on your end? Services that must support SSLv3 should enable the TLS Fallback SCSV mechanism until SSLv3 can be disabled. if echo "${ret}" | grep -q 'Cipher.0000'; then These versions of SSL are affected by several cryptographic flaws. Users also have to manually address their SSL Protocol settings on CentOS-5, CentOS-6, and CentOS-7 as well as install the updates below to mitigate POODLE and other SSL Fallback issues. Vul8: SSL Version 2 and 3 Protocol Detection: The remote service accepts connections encrypted using SSL 2.0 and/or SSL 3.0. This article will help you to re-enable them. Exploiting this vulnerability is not easily accomplished. Hi Is there a similar check possible for vsftpd? You won't have to change your code. POODLE Vulnerability - SSL 3.0 - Entrust Instead, disable SSLv3 (or, if you do use SSLv2, disable also SSLv2) in all products/components you use. In addition, OpenSSL vulnerabilities along with SSL 3 Fallback protection (TLS_FALLBACK_SCSV) were disclosed on October 15, 2014 by the OpenSSL Project. Some Transport Layer Security (TLS) implementations are also vulnerable to the POODLE attack. Select the Enabled option. What about RHDS? Handshake Failure with TLS1.2 client and TLS1.3 server Red Hat Enterprise Linux 6 and 7 erratum is RHSA-2014:1652. TLS Fallback Signaling Cipher Suite Value (SCSV), for Preventing Protocol Downgrade Attacks, Moeller & Langley Standards Track [Page 1], Moeller & Langley Standards Track [Page 2], Moeller & Langley Standards Track [Page 3], Moeller & Langley Standards Track [Page 4], Moeller & Langley Standards Track [Page 5], Moeller & Langley Standards Track [Page 6], Moeller & Langley Standards Track [Page 7], http://www.iana.org/assignments/tls-parameters. The ClientHello will set a minimum protocol version of TLS 1.0 and a maximum protocol version of TLS 1.2 in the ClientHello. However, instead of simply excluding RSA export cipher suites, we encourage administrators to disable support for all known insecure ciphers (e.g., there are export cipher suites protocols beyond RSA) and enable forward secrecy. DROWN is a serious vulnerability that affects HTTPS and other services that rely on SSL and TLS, some of the essential cryptographic protocols for Internet security. However, like many other attacks listed here, this vulnerability is also based on a forced downgrade attack. And you'd still have to ship the older shared libraries in a compatibility package (e.g., for RHEL5, an openssl098 package that contains libcrypto.so.6) for the older systems anyway, so that third-party applications linked against the now-outdated libcrypto libraries don't block the updates. This is covered in the "Resolution" section of this article and is specific per service and application. exit 1 If you delete them, you will see the PCA dialog the next time you open the app. Changes on your systems are not necessary in this case. Figure 2: Program Compatibility Assistant dialog after closing an application. In the attack, the adversary would force a negotiation failure of a higher protocol like TLS 1.2 or 1.1 in hopes the client will retry with TLS 1.0 or SSLv3. The older TLS protocol goes through what is called a downgraded or version roll-back attack. How to Enable TLS_FALLBACK_SCSV | Veracode Docs Transport Layer Security (TLS) 1.0 and 1.1 are security protocols for creating encryption channels over computer networks. Browsers and other similar software attempt to support every server created on {God|Allah|Brahman|}'s green earth. ${2-443} Examples of TLS/SSL Vulnerabilities TLS Security 6: | Acunetix These protocols allow everyone on the Internet to browse the web, use email, shop online, and send instant messages without third-parties being able to read the communication. What would a potion that increases resistance to damage actually do to the body? When an application tries to create a connection using TLS 1.1 and below, the connection might appear to fail. The Client Key Exchange never takes place, and no Content Type of Alert are sent. [root@njdevftp01 tmp]# sh poodle.sh THE FIX: TLS 1.3 offers protection against POODLE by disallowing a protocol downgrade. This is enabled by default with this fix, but can be disabled by setting the directive 'SSLFallbackProtection OFF' This fix is targeted for IBM HTTP Server fix packs: - 7.0.0.41 - 8.0.0.13 - 8.5.5.9. following error at client side. Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood, Temporary policy: Generative AI (e.g., ChatGPT) is banned. All systems and applications utilizing the Secure Socket Layer (SSL) 3.0 with cipher-block chaining (CBC) mode ciphers may be vulnerable. apache security https:// rm -rf ${FILE} The process may be elaborate. How to draw a picture of a Periodic function? or the University of California. (And your script will also fail on RHEL 5 like original RH script does. ; however, the POODLE script still identifies it as being VULNERABLE. Solution: Contact the vendor or consult product documentation to disable CBC mode cipher encryption, and enable CTR or GCM cipher mode encryption. -- Using certain client SSL profile protocol versions (e.g., the virtual server is configured for TLS1.3, and the client is configured for TLS1.0 - TLS1.2). This vulnerability allows a man-in-the-middle attacker to decrypt ciphertext using a padding oracle side-channel attack. Contact your vendor for details. :-). Note Well: if the client does not perform fallbacks, then the TLS_FALLBACK_SCSV extension is not needed. fi How does TLS_FALLBACK_SCSV help? - Cryptography Stack Exchange RFC 7507: TLS Fallback Signaling Cipher Suite Value (SCSV) for . Internet-Draft TLS Fallback SCSV July 2014 2.Protocol values This document defines a new TLS cipher suite value: TLS_FALLBACK_SCSV {0x56, 0x00} This is a signaling cipher suite value (SCSV), i.e., it does not actually correspond to a suite of cryptosystems, and it can never be selected by the server in the handshake; rather, its presence in the client hello message serves as a backwards . They all affect older versions of the protocol (TLSv1.2 and older). :443>. What it told you was that no service responded to HTTPS on 127.0.0.1:443. Security Assessment CVSS Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N What is TLS_FALLBACK_SCSV and how does it work? This situation can occur in three different ways, each of which results in a break in the chain below which certificates cannot be trusted. Microsoft has supported them since Windows XP and Windows Server 2003. "error: Unable to connect to host :443".". This may allow an attacker to recover the plaintext message from the ciphertext. Sites that cannot disable SSLv3 immediately should enable this mechanism. If the browser attempts to connect to 1990s era server and the connection fails, then the browser will fallback to a lesser protocol. Now, the POODLE attack requires a attacker to be able to intercept trafic ( something much harder to do for ldap, as that's usually internal to a company lan ), a client that would downgrade the connexion from tls to ssl v3, ( which is maybe not the case for ldap clients ). Vul7: SSLv3 Padding Oracle On Downgraded Legacy Encryption Vulnerability (POODLE): The remote host is affected by a man-in-the-middle (MitM) information disclosure vulnerability known as POODLE. #likes-and-labels-container { The poodle.sh script now checks for the timeout utility (part of coreutils in RHEL 6 and up), which is what prevented it from working on RHEL 5. my RHEL5.11 system supports TLSv1: I believe that means you're safe. Are you sure you want to update a translation? on the Security Blog: https://securityblog.redhat.com/2014/10/15/poodle-a-ssl3-vulnerability-cve-2014-3566/. To subscribe to this RSS feed, copy and paste this URL into your RSS reader.

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