CVE-2012-2135 (GCVE-0-2012-2135)
Vulnerability from cvelistv5 – Published: 2012-08-14 22:00 – Updated: 2024-08-06 19:26
VLAI
EPSS
VEX
Summary
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.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
8 references
| URL | Tags |
|---|---|
| http://www.ubuntu.com/usn/USN-1615-1 | vendor-advisoryx_refsource_UBUNTU |
| http://secunia.com/advisories/51087 | third-party-advisoryx_refsource_SECUNIA |
| http://www.ubuntu.com/usn/USN-1616-1 | vendor-advisoryx_refsource_UBUNTU |
| http://bugs.python.org/issue14579 | x_refsource_MISC |
| http://secunia.com/advisories/51089 | third-party-advisoryx_refsource_SECUNIA |
| http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=670389 | x_refsource_MISC |
| http://www.openwall.com/lists/oss-security/2012/04/25/4 | mailing-listx_refsource_MLIST |
| http://www.openwall.com/lists/oss-security/2012/04/25/2 | mailing-listx_refsource_MLIST |
Date Public
2012-04-14 00:00
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-06T19:26:09.000Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"name": "USN-1615-1",
"tags": [
"vendor-advisory",
"x_refsource_UBUNTU",
"x_transferred"
],
"url": "http://www.ubuntu.com/usn/USN-1615-1"
},
{
"name": "51087",
"tags": [
"third-party-advisory",
"x_refsource_SECUNIA",
"x_transferred"
],
"url": "http://secunia.com/advisories/51087"
},
{
"name": "USN-1616-1",
"tags": [
"vendor-advisory",
"x_refsource_UBUNTU",
"x_transferred"
],
"url": "http://www.ubuntu.com/usn/USN-1616-1"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "http://bugs.python.org/issue14579"
},
{
"name": "51089",
"tags": [
"third-party-advisory",
"x_refsource_SECUNIA",
"x_transferred"
],
"url": "http://secunia.com/advisories/51089"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=670389"
},
{
"name": "[oss-security] 20120425 Re: CVE Request: Python 3.2/3.3 utf-16 decoder unicode_decode_call_errorhandler aligned_end is not updated",
"tags": [
"mailing-list",
"x_refsource_MLIST",
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2012/04/25/4"
},
{
"name": "[oss-security] 20120425 CVE Request: Python 3.2/3.3 utf-16 decoder unicode_decode_call_errorhandler aligned_end is not updated",
"tags": [
"mailing-list",
"x_refsource_MLIST",
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2012/04/25/2"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"datePublic": "2012-04-14T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "n/a",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2013-01-29T10:00:00.000Z",
"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"shortName": "redhat"
},
"references": [
{
"name": "USN-1615-1",
"tags": [
"vendor-advisory",
"x_refsource_UBUNTU"
],
"url": "http://www.ubuntu.com/usn/USN-1615-1"
},
{
"name": "51087",
"tags": [
"third-party-advisory",
"x_refsource_SECUNIA"
],
"url": "http://secunia.com/advisories/51087"
},
{
"name": "USN-1616-1",
"tags": [
"vendor-advisory",
"x_refsource_UBUNTU"
],
"url": "http://www.ubuntu.com/usn/USN-1616-1"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "http://bugs.python.org/issue14579"
},
{
"name": "51089",
"tags": [
"third-party-advisory",
"x_refsource_SECUNIA"
],
"url": "http://secunia.com/advisories/51089"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=670389"
},
{
"name": "[oss-security] 20120425 Re: CVE Request: Python 3.2/3.3 utf-16 decoder unicode_decode_call_errorhandler aligned_end is not updated",
"tags": [
"mailing-list",
"x_refsource_MLIST"
],
"url": "http://www.openwall.com/lists/oss-security/2012/04/25/4"
},
{
"name": "[oss-security] 20120425 CVE Request: Python 3.2/3.3 utf-16 decoder unicode_decode_call_errorhandler aligned_end is not updated",
"tags": [
"mailing-list",
"x_refsource_MLIST"
],
"url": "http://www.openwall.com/lists/oss-security/2012/04/25/2"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"assignerShortName": "redhat",
"cveId": "CVE-2012-2135",
"datePublished": "2012-08-14T22:00:00.000Z",
"dateReserved": "2012-04-04T00:00:00.000Z",
"dateUpdated": "2024-08-06T19:26:09.000Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2012-2135",
"date": "2026-09-22",
"epss": "0.04549",
"percentile": "0.9116"
},
"nvd": {
"cve": {
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"matchCriteriaId": "A599D400-4DFF-45E9-869D-4C51FC04B520",
"versionEndExcluding": "2.7.4",
"versionStartIncluding": "2.7.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"matchCriteriaId": "D2CC57DA-61B2-4C5D-BDC4-7430912BD702",
"versionEndExcluding": "3.2.4",
"versionStartIncluding": "3.2.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"matchCriteriaId": "FD5652D5-BBAF-4BEC-82C3-5CB960846578",
"versionEndExcluding": "3.3.3",
"versionStartIncluding": "3.3.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:-:*:*:*",
"matchCriteriaId": "01EDA41C-6B2E-49AF-B503-EB3882265C11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:11.04:*:*:*:*:*:*:*",
"matchCriteriaId": "EF49D26F-142E-468B-87C1-BABEA445255C",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:11.10:*:*:*:*:*:*:*",
"matchCriteriaId": "E4174F4F-149E-41A6-BBCC-D01114C05F38",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*",
"matchCriteriaId": "CB66DB75-2B16-4EBF-9B93-CE49D8086E41",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:12.10:*:*:*:*:*:*:*",
"matchCriteriaId": "E2076871-2E80-4605-A470-A41C1A8EC7EE",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*",
"matchCriteriaId": "036E8A89-7A16-411F-9D31-676313BB7244",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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."
},
{
"lang": "es",
"value": "El descodificador UTF-16 en Python v3.1 a v3.3 no actualiza la variable aligned_end despu\u00e9s de llamar a la funci\u00f3n unicode_decode_call_errorhandler, lo que permite a atacantes remotos obtener informaci\u00f3n sensible (la memoria del proceso) o provocar una denegaci\u00f3n de servicio (por corrupci\u00f3n de memoria y ca\u00edda la aplicaci\u00f3n) a trav\u00e9s de vectores no especificados.\r\n"
}
],
"id": "CVE-2012-2135",
"lastModified": "2026-04-29T01:13:23.040",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 6.4,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 4.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
]
},
"published": "2012-08-14T22:55:01.253",
"references": [
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory"
],
"url": "http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=670389"
},
{
"source": "secalert@redhat.com",
"tags": [
"Vendor Advisory"
],
"url": "http://bugs.python.org/issue14579"
},
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory"
],
"url": "http://secunia.com/advisories/51087"
},
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory"
],
"url": "http://secunia.com/advisories/51089"
},
{
"source": "secalert@redhat.com",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://www.openwall.com/lists/oss-security/2012/04/25/2"
},
{
"source": "secalert@redhat.com",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://www.openwall.com/lists/oss-security/2012/04/25/4"
},
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory"
],
"url": "http://www.ubuntu.com/usn/USN-1615-1"
},
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory"
],
"url": "http://www.ubuntu.com/usn/USN-1616-1"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=670389"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "http://bugs.python.org/issue14579"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://secunia.com/advisories/51087"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://secunia.com/advisories/51089"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://www.openwall.com/lists/oss-security/2012/04/25/2"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://www.openwall.com/lists/oss-security/2012/04/25/4"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://www.ubuntu.com/usn/USN-1615-1"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://www.ubuntu.com/usn/USN-1616-1"
}
],
"sourceIdentifier": "secalert@redhat.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-Other"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2025-11-21T12:51:24+00:00",
"cve": "CVE-2012-2135",
"id": "CVE-2012-2135",
"initial_release_date": "2012-04-14T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "python3: Data leaks, memory damage and possible crash in utf-16 decoder",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2012/cve-2012-2135.json",
"version": "3"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…