Gentoo: CVS double free vulnerability
On servers which are configured to allow anonymous read-only access, this bug could be used by anonymous users to gain write privileges.
Summary
- - -------------------------------------------------------------------- GENTOO LINUX SECURITY ANNOUNCEMENT 200301-12 - - -------------------------------------------------------------------- DATE : 2003-01-21 09:43 UTC
- - --------------------------------------------------------------------
- From advisory:
"By sending a malformed directory name it is possible to trigger an error condition that will make the function return at a point where a global pointer variable is already freed and has not got a new value assigned yet. This will result in a classical double-free() when the next Directory request is handled. With the help of other CVS requests it is possible to either leak some information that could be used to determine the heap position or to execute arbitrary code on systems that are known to be vulnerable to this kind of bugs."
Read the full advisory at
SOLUTION
It is recommended that all Gentoo Linux users who are running dev-util/cvs upgrade to cvs-1.11.5 as follows:
emerge sync emerge -u cvs emerge clean
- - -------------------------------------------------------------------- aliz@gentoo.org - GnuPG key is available at - - --------------------------------------------------------------------
Resolution
References
Availability
Concerns
Severity
PACKAGE : cvs
SUMMARY : arbitrary code execution
EXPLOIT : remote
