CVE-2011-2939 (GCVE-0-2011-2939)
Vulnerability from cvelistv5 – Published: 2012-01-13 18:00 – Updated: 2024-08-06 23:15
VLAI
EPSS
VEX
Summary
Off-by-one error in the decode_xs function in Unicode/Unicode.xs in the Encode module before 2.44, as used in Perl before 5.15.6, might allow context-dependent attackers to cause a denial of service (memory corruption) via a crafted Unicode string, which triggers a heap-based buffer overflow.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
14 references
Date Public
2011-08-09 00:00
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"value": "Off-by-one error in the decode_xs function in Unicode/Unicode.xs in the Encode module before 2.44, as used in Perl before 5.15.6, might allow context-dependent attackers to cause a denial of service (memory corruption) via a crafted Unicode string, which triggers a heap-based buffer overflow."
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{
"lang": "es",
"value": "Error \"Off-by-one\" en la funci\u00f3n decode_xs en Unicode/Unicode.xs en el m\u00f3dulo Encode anterior a v2.44, utilizado en Perl anterior a v5.15.6 , podr\u00eda permitir a atacantes dependientes de contexto causar una denegaci\u00f3n de servicio (corrupci\u00f3n de memoria) a trav\u00e9s de un cadena de Unicode especialmente creada, provocando un desbordamiento de b\u00fafer basado en memoria din\u00e1mica (heap)."
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"version": "2.0"
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"cveTags": [],
"descriptions": [
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"lang": "en",
"value": "Off-by-one error in the decode_xs function in Unicode/Unicode.xs in the Encode module before 2.44, as used in Perl before 5.15.6, might allow context-dependent attackers to cause a denial of service (memory corruption) via a crafted Unicode string, which triggers a heap-based buffer overflow."
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{
"lang": "es",
"value": "Error \"Off-by-one\" en la funci\u00f3n decode_xs en Unicode/Unicode.xs en el m\u00f3dulo Encode anterior a v2.44, utilizado en Perl anterior a v5.15.6 , podr\u00eda permitir a atacantes dependientes de contexto causar una denegaci\u00f3n de servicio (corrupci\u00f3n de memoria) a trav\u00e9s de un cadena de Unicode especialmente creada, provocando un desbordamiento de b\u00fafer basado en memoria din\u00e1mica (heap)."
}
],
"id": "CVE-2011-2939",
"lastModified": "2026-04-29T01:13:23.040",
"metrics": {
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"baseSeverity": "MEDIUM",
"cvssData": {
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"accessVector": "NETWORK",
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"version": "2.0"
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"source": "nvd@nist.gov",
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"published": "2012-01-13T18:55:02.987",
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"current_release_date": "2025-11-21T12:54:40+00:00",
"cve": "CVE-2011-2939",
"id": "CVE-2011-2939",
"initial_release_date": "2011-08-09T00:00:00+00:00",
"product_status:fixed": "187",
"product_status:known_affected": "2",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "Perl decode_xs heap-based buffer overflow",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2011/cve-2011-2939.json",
"version": "3"
},
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"current_release_date": "2023-12-08T05:05:01Z",
"cve": "CVE-2011-2939",
"id": "CVE-2011-2939",
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"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2011-2939",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2011-2939.json",
"version": "3"
}
}
}
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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.
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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.
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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.
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