USN-520-1: fetchmail vulnerabilities
26 September 2007
fetchmail vulnerabilities
Releases
Packages
Details
Gaetan Leurent discovered a vulnerability in the APOP protocol based
on MD5 collisions. As fetchmail supports the APOP protocol, this
vulnerability can be used by attackers to discover a portion of the APOP
user's authentication credentials. (CVE-2007-1558)
Earl Chew discovered that fetchmail can be made to de-reference a NULL
pointer when contacting SMTP servers. This vulnerability can be used
by attackers who control the SMTP server to crash fetchmail and cause
a denial of service. (CVE-2007-4565)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 7.04
Ubuntu 6.10
Ubuntu 6.06
In general, a standard system upgrade is sufficient to effect the
necessary changes.