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Zero Day Initiative Advisory 08-054

Zero Day Initiative Advisory 08-054
Posted Aug 29, 2008
Authored by Tipping Point | Site zerodayinitiative.com

A vulnerability allows remote attackers to execute arbitrary code on systems with vulnerable installations of messaging applications that make use of the libpurple library. User interaction is not required to exploit this vulnerability. The specific flaw exists in the implementation of the MSN protocol, specifically the handling of SLP messages. The function msn_slplink_process_msg() fails to properly validate an offset value specified in the SLP packet. By providing a specific value, an attacker can overflow a heap buffer resulting in arbitrary code execution.

tags | advisory, remote, overflow, arbitrary, code execution, protocol
advisories | CVE-2008-2927
SHA-256 | e15e4d5ffbe515920af88f4eecd3c1a6f1e9059e4b62cd784e5ab4422f7cbdf1

Zero Day Initiative Advisory 08-054

Change Mirror Download
ZDI-08-054: Multiple Vendor libpurple MSN Protocol SLP Message Heap 
Overflow Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-08-054
August 28, 2008

-- CVE ID:
CVE-2008-2927

-- Affected Vendors:
Adium
Pidgin

-- Affected Products:
Adium Adiumx
Pidgin Pidgin

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
systems with vulnerable installations of messaging applications that
make use of the libpurple library. User interaction is not required to
exploit this vulnerability.

The specific flaw exists in the implementation of the MSN protocol,
specifically the handling of SLP messages. The function
msn_slplink_process_msg() fails to properly validate an offset value
specified in the SLP packet. By providing a specific value, an attacker
can overflow a heap buffer resulting in arbitrary code execution.

-- Vendor Response:
Pidgin has issued an update to correct this vulnerability. More
details can be found at:

http://www.pidgin.im/news/security/?id=25

-- Disclosure Timeline:
2008-05-27 - Vulnerability reported to vendor
2008-08-28 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
* Anonymous

-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, The Zero Day Initiative (ZDI) represents
a best-of-breed model for rewarding security researchers for responsibly
disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint provides its customers with zero day protection through
its intrusion prevention technology. Explicit details regarding the
specifics of the vulnerability are not exposed to any parties until
an official vendor patch is publicly available. Furthermore, with the
altruistic aim of helping to secure a broader user base, TippingPoint
provides this vulnerability information confidentially to security
vendors (including competitors) who have a vulnerability protection or
mitigation product.

Our vulnerability disclosure policy is available online at:

http://www.zerodayinitiative.com/advisories/disclosure_policy/

CONFIDENTIALITY NOTICE: This e-mail message, including any attachments,
is being sent by 3Com for the sole use of the intended recipient(s) and
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