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Sendmail: Race condition in the handling of asynchronous signals


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


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

2.  Impact Information


Sendmail is a popular mail transfer agent (MTA).


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


An attacker could exploit this via certain crafted timing conditions.

3.  Resolution Information


There is no known workaround at this time.


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


Page updated March 22, 2006

Summary: This is a Gentoo Linux Security Advisory

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