60797 : Expat libexpat lib/xmltok.c big2_toUtf8 Function UTF-8 XML Document Handling Overflow DoS
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Views This Week Views All Time Added to OSVDB Last Modified Modified (since 2008) Percent Complete
1 1248 over 4 years ago over 1 year ago 9 times 100%

Timeline

Disclosure Date
2009-11-05

Description

Expat contains a flaw in the handling of XML documents that may allow a remote denial of service. The issue is due to the 'big2_toUtf8()' function in lib/xmltok.c not validating user-supplied input. With a specially crafted XML file containing malformed UTF-8 sequences, a context-dependent attacker can cause the service to crash.

Classification

Location: Context Dependent
Impact: Loss of Availability
Solution: Third-Party Solution
Exploit: Exploit Unknown
Disclosure: Third-party Verified
OSVDB: Web Related

Solution

Multiple vendors have released an upgrade to address this vulnerability. Check the vendor advisory, changelog, or solution in the references section for details.

Products

Expat
Expat
2.0.1

References

Tools & Filters

50070

Credit

CVSSv2 Score

CVSSv2 Base Score = 5.0
Source: nvd.nist.gov | Generated: 2009-12-07 | Disagree?

Access_vector_2 Access_complexity_2 Authentication_2 Confidentiality_impact_0 Integrity_impact_0 Availability_impact_1

Comments

No Comments.

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