CVE-2021-22564

Out of bounds Copy in Libjxl in large image groups

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

For certain valid JPEG XL images with a size slightly larger than an integer number of groups (256x256 pixels) when processing the groups out of order the decoder can perform an out of bounds copy of image pixels from an image buffer in the heap to another. This copy can occur when processing the right or bottom edges of the image, but only when groups are processed in certain order. Groups can be processed out of order in multi-threaded decoding environments with heavy thread load but also with images that contain the groups in an arbitrary order in the file. It is recommended to upgrade past 0.6.0 or patch with https://github.com/libjxl/libjxl/pull/775

Para determinadas imágenes JPEG XL válidas con un tamaño ligeramente superior a un número entero de grupos (256x256 píxeles), cuando son procesados los grupos fuera de orden, el descodificador puede llevar a cabo una copia fuera de límites de los píxeles de la imagen desde un búfer de imagen en la pila a otro. Esta copia puede producirse cuando son procesados los bordes derecho o inferior de la imagen, pero sólo cuando los grupos son procesados en un orden determinado. Los grupos pueden ser procesados fuera de orden en entornos de decodificación multihilo con gran carga de hilos, pero también con imágenes que contienen los grupos en un orden arbitrario en el archivo. Se recomienda actualizar a partir de la versión 0.6.0 o parchear con https://github.com/libjxl/libjxl/pull/775

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-05 CVE Reserved
2021-11-01 CVE Published
2023-05-25 EPSS Updated
2024-09-17 CVE Updated
2024-09-17 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-122: Heap-based Buffer Overflow
CWE-787: Out-of-bounds Write

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC
https://github.com/libjxl/libjxl/issues/708	2024-09-17

URL	Date	SRC
https://github.com/libjxl/libjxl/pull/775	2021-11-02

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Libjxl Project Search vendor "Libjxl Project"		Libjxl Search vendor "Libjxl Project" for product "Libjxl"				<= 0.6.0 Search vendor "Libjxl Project" for product "Libjxl" and version " <= 0.6.0"		-		Affected