Vulnerability Monitor

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CVE-2012-2135

The utf-16 decoder in Python 3.1 through 3.3 does not update the aligned_end variable after calling the unicode_decode_call_errorhandler function, which allows remote attackers to obtain sensitive information (process memory) or cause a denial of service (memory corruption and crash) via unspecified vectors.

Security Impact Summary

CVE-2012-2135 is a security vulnerability that . Impacting 3 products from python, from canonical, from debian 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

2012-08-14T22:55:01.253

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 6.4 (MEDIUM)

CVSSv2 Vector

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

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

4.9

Weaknesses

Type: Primary
NVD-CWE-Other

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	python	python	< 2.7.4	Yes
Application	python	python	< 3.2.4	Yes
Application	python	python	< 3.3.3	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	canonical	ubuntu_linux	12.10	Yes
Operating System	debian	debian_linux	6.0	Yes

References

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=670389 Third Party Advisory ([email protected])
http://bugs.python.org/issue14579 Vendor Advisory ([email protected])
http://secunia.com/advisories/51087 Third Party Advisory ([email protected])
http://secunia.com/advisories/51089 Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2012/04/25/2 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2012/04/25/4 Mailing List, Third Party Advisory ([email protected])
http://www.ubuntu.com/usn/USN-1615-1 Third Party Advisory ([email protected])
http://www.ubuntu.com/usn/USN-1616-1 Third Party Advisory ([email protected])
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=670389 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://bugs.python.org/issue14579 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/51087 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/51089 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2012/04/25/2 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2012/04/25/4 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.ubuntu.com/usn/USN-1615-1 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.ubuntu.com/usn/USN-1616-1 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

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 python'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.