CVE-2015-6818

Ubuntu Security Notice USN-2944-1

Severity Score

7.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The decode_ihdr_chunk function in libavcodec/pngdec.c in FFmpeg before 2.7.2 does not enforce uniqueness of the IHDR (aka image header) chunk in a PNG image, which allows remote attackers to cause a denial of service (out-of-bounds array access) or possibly have unspecified other impact via a crafted image with two or more of these chunks.

Vulnerabilidad en la función decode_ihdr_chunk en libavcodec/pngdec.c en FFmpeg en versiones anteriores a 2.7.2, no impone la singularidad del fragmento IHDR (también conocida como cabecera de imagen) en una imagen PNG, lo que permite a atacantes remotos causar una denegación de servicio (acceso a array fuera de rango) o posiblemente tener otro impacto no especificado a través de una imagen manipulada con dos o más de estos fragmentos.

It was discovered that Libav incorrectly handled certain malformed media files. If a user were tricked into opening a crafted media file, an attacker could cause a denial of service via application crash, or possibly execute arbitrary code with the privileges of the user invoking the program.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2015-09-05 CVE Reserved
2015-09-06 CVE Published
2024-08-06 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-17: DEPRECATED: Code

CAPEC

References (5)

URL	Tag	Source
http://ffmpeg.org/security.html	X_refsource_confirm
http://git.videolan.org/?p=ffmpeg.git%3Ba=commit%3Bh=47f4e2d8960ca756ca153ab8e3e93d80449b8c91	X_refsource_confirm
http://www.securitytracker.com/id/1033483	Vdb Entry
https://lists.debian.org/debian-lts-announce/2018/12/msg00009.html	Mailing List

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://www.ubuntu.com/usn/USN-2944-1	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Ffmpeg Search vendor "Ffmpeg"		Ffmpeg Search vendor "Ffmpeg" for product "Ffmpeg"				<= 2.7.1 Search vendor "Ffmpeg" for product "Ffmpeg" and version " <= 2.7.1"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				12.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04"		lts		Affected