Python up to 3.3 unicode_decode_call_errorhandler aligned_end memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Python up to 3.3. It has been declared as critical. This impacts the function unicode_decode_call_errorhandler. The manipulation of the argument aligned_end results in memory corruption. This vulnerability is known as CVE-2012-2135. No exploit is available.

Detailsinfo

A vulnerability was found in Python up to 3.3 (Programming Language Software). It has been classified as critical. Affected is the function unicode_decode_call_errorhandler. The manipulation of the argument aligned_end with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, and availability. CVE summarizes:

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.

The weakness was published 08/14/2012 (Website). The advisory is shared for download at ubuntu.com. This vulnerability is traded as CVE-2012-2135 since 04/04/2012. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 74675 (openSUSE Security Update : python3 (openSUSE-SU-2012:0861-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195410 (Ubuntu Security Notification for Python3.1 Vulnerabilities (USN-1616-1)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (77783), Tenable (74675), Secunia (SA51089†) and Vulnerability Center (SBV-40259†). Similar entries are available at VDB-10932, VDB-10931, VDB-10939 and VDB-10937. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 6.5
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 74675
Nessus Name: openSUSE Security Update : python3 (openSUSE-SU-2012:0861-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 841197
OpenVAS Name: Ubuntu Update for python3.2 USN-1615-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/04/2012 🔍
04/14/2012 +10 days 🔍
08/14/2012 +122 days 🔍
08/14/2012 +0 days 🔍
07/01/2013 +321 days 🔍
06/13/2014 +347 days 🔍
03/23/2015 +283 days 🔍
12/07/2021 +2451 days 🔍

Sourcesinfo

Advisory: USN-1615-1
Status: Not defined

CVE: CVE-2012-2135 (🔍)
GCVE (CVE): GCVE-0-2012-2135
GCVE (VulDB): GCVE-100-61620

OVAL: 🔍

X-Force: 77783
Secunia: 51089
Vulnerability Center: 40259 - Python 3.1 - 3.3 Remote Denial of Service or Leakage of Information, Medium

See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 12/07/2021 18:00
Changes: 03/23/2015 16:50 (66), 05/04/2017 10:33 (3), 12/07/2021 17:53 (3), 12/07/2021 18:00 (1)
Complete: 🔍
Cache ID: 216::103

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