Secunia Research: CUPS IPP Tags Memory Corruption Vulnerability

From: Secunia Research <remove-vuln(at)secunia.com>
Date: Wed Oct 31 2007 - 05:40:12 EDT

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                     Secunia Research 31/10/2007

           - CUPS IPP Tags Memory Corruption Vulnerability -

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Table of Contents

Affected Software....................................................1
Severity.............................................................2
Vendor's Description of Software.....................................3
Description of Vulnerability.........................................4
Solution.............................................................5
Time Table...........................................................6
Credits..............................................................7
References...........................................................8
About Secunia........................................................9
Verification........................................................10

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1) Affected Software

• CUPS 1.3.3.

NOTE: Other versions may also be affected.

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2) Severity

Rating: Moderately Critical
Impact: System Access
Where: Local network

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3) Vendor's Description of Software

"CUPS provides a portable printing layer for UNIX®-based operating systems. It was developed by Easy Software Products and is now owned and maintained by Apple Inc. to promote a standard printing solution. It is the standard printing system in Mac OS X and most Linux distributions".

Product Link:
http://www.cups.org/

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4) Description of Vulnerability

Secunia Research has discovered a vulnerability in CUPS, which can be exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a boundary error within the "ippReadIO()" function in cups/ipp.c when processing IPP (Internet Printing Protocol) tags. This can be exploited to overwrite one byte on the stack with a zero by sending an IPP request containing specially crafted "textWithLanguage" or "nameWithLanguage" tags.

Successful exploitation allows execution of arbitrary code.

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5) Solution

Patches for various Linux distributions should be available shortly.

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6) Time Table

16/10/2007 - Vendor notified.
22/10/2007 - vendor-sec notified.
31/10/2007 - Public disclosure.

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7) Credits

Discovered by Alin Rad Pop, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned CVE-2007-4351 for the vulnerability.

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9) About Secunia

Secunia offers vulnerability management solutions to corporate customers with verified and reliable vulnerability intelligence relevant to their specific system configuration:

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Secunia also provides a publicly accessible and comprehensive advisory database as a service to the security community and private individuals, who are interested in or concerned about IT-security.

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Secunia believes that it is important to support the community and to do active vulnerability research in order to aid improving the security and reliability of software in general:

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http://secunia.com/secunia_security_advisories/

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1. Verification

Please verify this advisory by visiting the Secunia website: http://secunia.com/secunia_research/2007-76/

Complete list of vulnerability reports published by Secunia Research: http://secunia.com/secunia_research/

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Received on Wed Oct 31 11:22:31 2007