CVE-2020-21674

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Heap-based buffer overflow in archive_string_append_from_wcs() (archive_string.c) in libarchive-3.4.1dev allows remote attackers to cause a denial of service (out-of-bounds write in heap memory resulting into a crash) via a crafted archive file. NOTE: this only affects users who downloaded the development code from GitHub. Users of the product's official releases are unaffected.

Un desbordamiento del búfer en la región heap de la memoria en la función archive_string_append_from_wcs() (en el archivo archive_string.c) en libarchive-3.4.1dev, permite a atacantes remotos causar una denegación de servicio (una escritura fuera de límites en la memoria de la pila resultando en un bloqueo) por medio de un archivo de almacenamiento diseñado. NOTA: esto solo afecta a los usuarios que descargaron el código de desarrollo de GitHub. Los usuarios de los lanzamientos oficiales del producto no están afectados

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-08-13 CVE Reserved
2020-10-15 CVE Published
2023-07-01 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-787: Out-of-bounds Write

CAPEC

References (2)

URL	Tag	Source
https://github.com/libarchive/libarchive/issues/1298	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://github.com/libarchive/libarchive/commit/4f085eea879e2be745f4d9bf57e8513ae48157f4	2020-10-26

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Libarchive Search vendor "Libarchive"		Libarchive Search vendor "Libarchive" for product "Libarchive"				3.4.1 Search vendor "Libarchive" for product "Libarchive" and version "3.4.1"		-		Affected