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TITLE:
Sendmail Multi-Part MIME Message Handling Denial of Service

SECUNIA ADVISORY ID:
SA15779

VERIFY ADVISORY:
http://secunia.com/advisories/15779/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote

OPERATING SYSTEM:
Sendmail Sentrion 1.x
http://secunia.com/product/8865/

SOFTWARE:
Sendmail 8.x
http://secunia.com/product/145/
Sendmail Message Store/SAMS 1.x
http://secunia.com/product/1198/
Sendmail Message Store/SAMS 2.x
http://secunia.com/product/8869/
Sendmail Switch 2.x
http://secunia.com/product/1197/
Sendmail Switch 3.x
http://secunia.com/product/1196/
Intelligent Quarantine 3.x
http://secunia.com/product/8872/

DESCRIPTION:
A vulnerability has been reported in Sendmail, which can be exploited
by malicious people to cause a DoS (Denial of Service).

The vulnerability is cause due to an error in the termination of the
recursive "mime8to7()" function when performing MIME conversions.
This can be exploited to cause a certain sendmail process to crash
when it runs out of stack space while processing a deeply nested
malformed MIME message.

Successful exploitation causes the delivery of other queued messages
to fail or causes the generated core dump files to fill up available
disk space.

The vulnerability has been reported in version 8.13.6 and prior.

SOLUTION:
Update to version 8.13.7.

Users of the commercial products should see the patch matrix in the
vendor advisory for details.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Frank Sheiness.

ORIGINAL ADVISORY:
Sendmail.org:
http://www.sendmail.org/releases/8.13.7.html

Sendmail.com:
http://www.sendmail.com/security/advisories/SA-200605-01.txt.asc

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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