TITLE:
Sendmail Signal Handling Memory Corruption Vulnerability

SECUNIA ADVISORY ID:
SA19342

VERIFY ADVISORY:
http://secunia.com/advisories/19342/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

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

SOFTWARE:
Sendmail Switch 3.x
http://secunia.com/product/1196/
Sendmail Switch 2.x
http://secunia.com/product/1197/
Sendmail Multi-Switch 3.x
http://secunia.com/product/8871/
Sendmail Multi-Switch 2.x
http://secunia.com/product/8870/
Sendmail Message Store/SAMS 2.x
http://secunia.com/product/8869/
Sendmail Message Store/SAMS 1.x
http://secunia.com/product/1198/
Sendmail Managed MTA 3.x
http://secunia.com/product/8867/
Sendmail Managed MTA 2.x
http://secunia.com/product/8866/
Sendmail 8.x
http://secunia.com/product/145/
Intelligent Quarantine 3.x
http://secunia.com/product/8872/

DESCRIPTION:
ISS X-Force has reported a vulnerability in Sendmail, which can be
exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a signal handling error when
receiving and processing mail data from clients. This can be
exploited to corrupt memory by sending specially crafted data at
certain time intervals.

Successful exploitation allows execution of arbitrary code with the
privileges of the sendmail server daemon.

The vulnerability has been reported in the following products:
* Sendmail 8.13.5 and prior
* Sendmail 8.12.11 and prior
* Sendmail Sentrion 1.1
* Sendmail Switch 2.x, 3.0.x, and 3.1.x (Solaris, Linux, AIX, and
HP-UX)
* Sendmail Managed MTA 2.x, 3.0.x, and 3.1.x (Solaris, Linux, AIX,
and HP-UX)
* Sendmail Multi-Switch 2.x, 3.0.x, and 3.1.x (Solaris, Linux, AIX,
and HP-UX)
* Sendmail Message Store/SAMS 1.2.x, 2.0.x, 2.1.x, and 2.2.x
(Solaris, Linux, AIX, and HP-UX)
* Intelligent Quarantine 3.0 (Solaris or Linux)

SOLUTION:
Update to version 8.13.6 or apply patch.

Patch for version 8.13.5:
ftp://ftp.sendmail.org/pub/sendmail/8.13.5.p0

Patch for version 8.12.11:
ftp://ftp.sendmail.org/pub/sendmail/8.12.11.p0

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

PROVIDED AND/OR DISCOVERED BY:
Mark Dowd, ISS X-Force.

ORIGINAL ADVISORY:
ISS X-Force:
http://xforce.iss.net/xforce/alerts/id/216

Sendmail.org:
http://www.sendmail.org/8.13.6.html

Sendmail.com:
http://www.sendmail.com/company/advisory/

OTHER REFERENCES:
US-CERT VU#834865:
http://www.kb.cert.org/vuls/id/834865

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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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