How can I disable SSLv3 in syslog-ng 3.3.2 client config to sovle CVE-2014-3566(SSLv3 Fallback Vulnerabilit)?
Hi guys In my project I am using syslog-ng as syslog client and send log via TLS. We all know that recently there is one new security flaw which is Poodle(CVE-2014-3566 - SSLv3 Fallback Vulnerability) This requires disabling SSLv3 I have checked admin guide of syslog-ng 3.3.2 but I am able to find the option Could you please let me know the way? Alternatively I think I may achieve the object by disable SSLv3 ciphers used by syslog-ng client original ciphers used by us is ALL:!SSLv2:!MEDIUM:!LOW:!EXP:!ADH:!ECDH:!PSK:!MD5:@STRENGTH I may change it to ALL:!SSLv3:!SSLv2:!MEDIUM:!LOW:!EXP:!ADH:!ECDH:!PSK:!MD5:@STRENGTH Bug this will make syslog-ng only supports TLS1.2 and cause negative impact to interoperability Thanks Jason
Hi, The BalaBit team has worked on this issue, but IIRC they upgraded the openssl library in the installation package. Is that an option for you? Certainly syslog-ng could disable certain protocols using options, but work has not been done. It wouldn't be too difficult though, as we already disable SSLv2 (without options). Can you perhaps make a stab at contributing this as a patch? This is the line that disables SSLv2: lib/tlscontext.c:334: SSL_CTX_set_options(self->ssl_ctx, SSL_OP_NO_SSLv2); On Wed, Oct 29, 2014 at 2:16 AM, bluebenben <bluebenben@163.com> wrote:
Hi guys
In my project I am using syslog-ng as syslog client and send log via TLS. We all know that recently there is one new security flaw which is Poodle(CVE-2014-3566 - SSLv3 Fallback Vulnerability) This requires disabling SSLv3 I have checked admin guide of syslog-ng 3.3.2 but I am able to find the option Could you please let me know the way?
Alternatively I think I may achieve the object by disable SSLv3 ciphers used by syslog-ng client original ciphers used by us is ALL:!SSLv2:!MEDIUM:!LOW:!EXP:!ADH:!ECDH:!PSK:!MD5:@STRENGTH I may change it to ALL:!SSLv3:!SSLv2:!MEDIUM:!LOW:!EXP:!ADH:!ECDH:!PSK:!MD5:@STRENGTH Bug this will make syslog-ng only supports TLS1.2 and cause negative impact to interoperability
Thanks
Jason
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participants (2)
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Balazs Scheidler
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bluebenben