USN-520-1: fetchmail vulnerabilities

Releases

• Ubuntu 7.04
• Ubuntu 6.10
• Ubuntu 6.06

Packages

• fetchmail -

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

• fetchmail - 6.3.6-1ubuntu2.1

Ubuntu 6.10

• fetchmail - 6.3.4-1ubuntu4.2

Ubuntu 6.06

• fetchmail - 6.3.2-2ubuntu2.2

In general, a standard system upgrade is sufficient to effect the
necessary changes.

References

• CVE-2007-1558
• CVE-2007-4565

Related notices

• USN-469-1: mozilla-thunderbird