On Tue, Nov 12, 2013, Alok Sharma wrote: > One of the openSSL vulnerabilities is: > > CVE-2013-0169: > > The TLS protocol 1.1 and 1.2 and the DTLS protocol 1.0 and 1.2, as used > in OpenSSL, , do not properly consider timing side-channel attacks on a MAC > check requirement during the processing of malformed CBC padding, which > allows remote attackers to conduct distinguishing attacks and > plaintext-recovery attacks via statistical analysis of timing data for > crafted packets, aka the "Lucky Thirteen" issue. > > All versions of OpenSSL are affected including 1.0.1c, 1.0.0j and 0.9.8x > > Affected users should upgrade to OpenSSL 1.0.1d, 1.0.0k or 0.9.8y > > we use DTLS 1.0 protocol. > > Does anyone know of any setting in openssl configuration that can be > tweaked to mitigate this vulnerability? E.g. a setting to not allow use of > algorithms with CBC etc.? >
The vulnerability is addressed in the latest OpenSSL releases. If you disable CBC ciphers then you're only left with GCM and RC4. RC4 can't be used with DTLS and GCM is only supported in DTLS 1.2. Steve. -- Dr Stephen N. Henson. OpenSSL project core developer. Commercial tech support now available see: http://www.openssl.org ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager majord...@openssl.org
