CVE-2021-4156

libsndfile: heap out-of-bounds read in src/flac.c in flac_buffer_copy

Severity Score

7.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An out-of-bounds read flaw was found in libsndfile's FLAC codec functionality. An attacker who is able to submit a specially crafted file (via tricking a user to open or otherwise) to an application linked with libsndfile and using the FLAC codec, could trigger an out-of-bounds read that would most likely cause a crash but could potentially leak memory information that could be used in further exploitation of other flaws.

Se ha encontrado un fallo de lectura fuera de límites en la funcionalidad del códec FLAC de libsndfile. Un atacante que sea capaz de enviar un archivo especialmente diseñado (por medio de engañar a un usuario para que lo abra o de otro modo) a una aplicación enlazada con libsndfile y que use el códec FLAC, podría desencadenar una lectura fuera de límites que muy probablemente causaría un fallo, pero podría filtrar información de la memoria que podría usarse en una explotación posterior de otros fallos

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-12-22 CVE Reserved
2022-03-23 CVE Published
2023-11-12 EPSS Updated
2024-08-03 CVE Updated
2024-08-03 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-125: Out-of-bounds Read

CAPEC

References (7)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2022/06/msg00020.html	Mailing List
https://lists.debian.org/debian-lts-announce/2022/09/msg00036.html	Mailing List

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=2027690	2024-08-03
https://github.com/libsndfile/libsndfile/issues/731	2024-08-03

URL	Date	SRC
https://github.com/libsndfile/libsndfile/pull/732/commits/4c30646abf7834e406f7e2429c70bc254e18beab	2023-09-29

URL	Date	SRC
https://security.gentoo.org/glsa/202309-11	2023-09-29
https://access.redhat.com/security/cve/CVE-2021-4156	2022-05-10

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Libsndfile Project Search vendor "Libsndfile Project"		Libsndfile Search vendor "Libsndfile Project" for product "Libsndfile"				1.1.10 Search vendor "Libsndfile Project" for product "Libsndfile" and version "1.1.10"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected