Vulnerability Instance

This module exploits a stack buffer overflow in the yaSSL (1.9.8 and earlier)
          implementation bundled with MySQL. By sending a specially crafted
          client certificate, an attacker can execute arbitrary code.

          This vulnerability is present within the CertDecoder::GetName function inside
          "taocrypt/src/asn.cpp". However, the stack buffer that is written to exists
          within a parent function's stack frame.

          NOTE: This vulnerability requires a non-default configuration. First, the attacker
          must be able to pass the host-based authentication. Next, the server must be
          configured to listen on an accessible network interface.  Lastly, the server
          must have been manually configured to use SSL.

          The binary from version 5.5.0-m2 was built with /GS and /SafeSEH. During testing
          on Windows XP SP3, these protections successfully prevented exploitation.

          Testing was also done with mysql on Ubuntu 9.04. Although the vulnerable code is
          present, both version 5.5.0-m2 built from source and version 5.0.75 from a binary
          package were not exploitable due to the use of the compiler's FORTIFY feature.

          Although suse11 was mentioned in the original blog post, the binary package they
          provide does not contain yaSSL or support SSL.

Reliability:
  - unknown-reliability
Stability:
  - unknown-stability
SideEffects:
  - unknown-side-effects