FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

openssl -- TLS extension parsing race condition

Affected packages
openssl < 1.0.0_2


VuXML ID 3042c33a-f237-11df-9d02-0018fe623f2b
Discovery 2010-10-08
Entry 2010-11-17

OpenSSL Team reports:

Rob Hulswit has found a flaw in the OpenSSL TLS server extension code parsing which on affected servers can be exploited in a buffer overrun attack.

Any OpenSSL based TLS server is vulnerable if it is multi-threaded and uses OpenSSL's internal caching mechanism. Servers that are multi-process and/or disable internal session caching are NOT affected.

In particular the Apache HTTP server (which never uses OpenSSL internal caching) and Stunnel (which includes its own workaround) are NOT affected.


CVE Name CVE-2010-3864