Xmail: Privilege escalation through sendmail — GLSA 200512-05

The sendmail program in Xmail is vulnerable to a buffer overflow, potentially resulting in local privilege escalation.

Affected Packages

mail-mta/xmail on all architectures
Affected versions < 1.22
Unaffected versions >= 1.22

Background

Xmail is an Internet and intranet mail server.

Description

iDEFENSE reported that the AddressFromAtPtr function in the sendmail program fails to check bounds on arguments passed from other functions, and as a result an exploitable stack overflow condition occurs when specifying the "-t" command line option.

Impact

A local attacker can make a malicious call to sendmail, potentially resulting in code execution with elevated privileges.

Workaround

There is no known workaround at this time.

Resolution

All Xmail users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=mail-mta/xmail-1.22"

References

Release Date
December 14, 2005

Latest Revision
December 14, 2005: 01

Severity
high

Exploitable
local

Bugzilla entries