Operating System:


04 March 2003

Protect yourself against future threats.


             AUSCERT External Security Bulletin Redistribution

                ESB-2003.0142 -- OpenBSD Security Advisory
                         Sendmail buffer overflow
                               04 March 2003


        AusCERT Security Bulletin Summary

Product:                Sendmail
Vendor:                 OpenBSD
Impact:                 Root Compromise
Access Required:        Remote

Ref:                    AA-2003.01

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A buffer overflow has been found in sendmail's envelope comment
processing code which may allow an attacker to gain root privileges.
The bug was discovered by Mark Dowd of ISS X-Force.

For more information, see:

As shipped, OpenBSD runs a sendmail that binds only to localhost,
making this a localhost-only hole in the default configuration.
However, any sendmail configuration that accepts incoming mail may
potentially be exploited.

The sendmail in OpenBSD-current has been updated to version 8.12.8.
The 3.1 and 3.2 -stable branches have had a patch applied that fixes
the buffer overflow.  However, because the -stable branches have
the specific vulnerability patched (as opposed to the full 8.12.8
distribution), sendmail on -stable will report the old sendmail version.

Patch for OpenBSD 3.1:

Patch for OpenBSD 3.2:

Patches for older versions of sendmail may be found at

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