Vulnerability Monitor

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CVE-2012-0876

The XML parser (xmlparse.c) in expat before 2.1.0 computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via an XML file with many identifiers with the same value.

Security Impact Summary

CVE-2012-0876 is a security vulnerability that . Impacting 11 products from libexpat_project, from python, from debian and 8 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Documented in 2012, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.

Published

2012-07-03T19:55:02.210

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 4.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:N/A:P

  • Access Vector: NETWORK
  • Access Complexity: MEDIUM
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: PARTIAL
Exploitability Score

8.6

Impact Score

2.9

Weaknesses
  • Type: Primary
    CWE-400
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application libexpat_project libexpat < 2.1.0 Yes
Application python python < 2.6.8 Yes
Application python python < 2.7.3 Yes
Application python python < 3.1.5 Yes
Application python python < 3.2.3 Yes
Operating System debian debian_linux 6.0 Yes
Operating System debian debian_linux 7.0 Yes
Operating System canonical ubuntu_linux 8.04 Yes
Operating System canonical ubuntu_linux 10.04 Yes
Operating System canonical ubuntu_linux 11.04 Yes
Operating System canonical ubuntu_linux 11.10 Yes
Operating System canonical ubuntu_linux 12.04 Yes
Operating System oracle solaris 11.3 Yes
Application redhat storage 2.0 Yes
Operating System redhat enterprise_linux_desktop 5.0 Yes
Operating System redhat enterprise_linux_desktop 6.0 Yes
Operating System redhat enterprise_linux_eus 6.2 Yes
Operating System redhat enterprise_linux_server 5.0 Yes
Operating System redhat enterprise_linux_server 6.0 Yes
Operating System redhat enterprise_linux_server_aus 6.2 Yes
Operating System redhat enterprise_linux_workstation 5.0 Yes
Operating System redhat enterprise_linux_workstation 6.0 Yes
References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For libexpat_project's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.