Sendmail: Race condition in the handling of asynchronous signals

Security Team  Contact Address

Updated March 22, 2006

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200603-21 / sendmail
Release Date March 22, 2006
Latest Revision March 22, 2006: 01
Impact high
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
mail-mta/sendmail < 8.13.6 >= 8.13.6 All supported architectures

Related bugreports: #125623

Synopsis

Sendmail is vulnerable to a race condition which could lead to the execution of arbitrary code with sendmail privileges.

2.  Impact Information

Background

Sendmail is a popular mail transfer agent (MTA).

Description

ISS discovered that Sendmail is vulnerable to a race condition in the handling of asynchronous signals.

Impact

An attacker could exploit this via certain crafted timing conditions.

3.  Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Sendmail users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-mta/sendmail-8.13.6"

4.  References