Sendmail: Race condition in the handling of asynchronous signals

1. Gentoo Linux Security Advisory

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

Updated March 22, 2006

Summary: This is a Gentoo Linux Security Advisory

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