Détail du CWE-127

CWE-127

Buffer Under-read
Draft
2006-07-19
00h00 +00:00
2023-10-26
00h00 +00:00
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Nom: Buffer Under-read

The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations prior to the targeted buffer.

Description du CWE

This typically occurs when the pointer or its index is decremented to a position before the buffer, when pointer arithmetic results in a position before the beginning of the valid memory location, or when a negative index is used. This may result in exposure of sensitive information or possibly a crash.

Informations générales

Modes d'introduction

Implementation

Plateformes applicables

Langue

Name: C (Undetermined)
Name: C++ (Undetermined)

Conséquences courantes

Portée Impact Probabilité
ConfidentialityRead Memory
ConfidentialityBypass Protection Mechanism

Note: By reading out-of-bounds memory, an attacker might be able to get secret values, such as memory addresses, which can be bypass protection mechanisms such as ASLR in order to improve the reliability and likelihood of exploiting a separate weakness to achieve code execution instead of just denial of service.

Exemples observés

Références Description

CVE-2021-40985

HTML conversion package has a buffer under-read, allowing a crash

Notes de cartographie des vulnérabilités

Justification : This CWE entry is at the Variant level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.
Commentaire : Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.

NotesNotes

Under-studied.

Références

REF-1034

Breaking the memory secrecy assumption
Raoul Strackx, Yves Younan, Pieter Philippaerts, Frank Piessens, Sven Lachmund, Thomas Walter.
https://dl.acm.org/doi/10.1145/1519144.1519145

REF-1035

The info leak era on software exploitation
Fermin J. Serna.
https://media.blackhat.com/bh-us-12/Briefings/Serna/BH_US_12_Serna_Leak_Era_Slides.pdf

REF-44

24 Deadly Sins of Software Security
Michael Howard, David LeBlanc, John Viega.

Soumission

Nom Organisation Date Date de publication Version
PLOVER 2006-07-19 +00:00 2006-07-19 +00:00 Draft 3

Modifications

Nom Organisation Date Commentaire
CWE Content Team MITRE 2008-09-08 +00:00 updated Applicable_Platforms, Relationships, Taxonomy_Mappings, Weakness_Ordinalities
CWE Content Team MITRE 2009-10-29 +00:00 updated Description, Relationships
CWE Content Team MITRE 2011-06-01 +00:00 updated Common_Consequences
CWE Content Team MITRE 2012-05-11 +00:00 updated Relationships
CWE Content Team MITRE 2014-07-30 +00:00 updated Relationships, Taxonomy_Mappings
CWE Content Team MITRE 2017-11-08 +00:00 updated Causal_Nature
CWE Content Team MITRE 2019-09-19 +00:00 updated Common_Consequences, References
CWE Content Team MITRE 2020-02-24 +00:00 updated Relationships
CWE Content Team MITRE 2023-01-31 +00:00 updated Description
CWE Content Team MITRE 2023-04-27 +00:00 updated References, Relationships
CWE Content Team MITRE 2023-06-29 +00:00 updated Mapping_Notes
CWE Content Team MITRE 2023-10-26 +00:00 updated Observed_Examples