CVE-2021-21066

Adobe Bridge Font Parsing Out-Of-Bounds Write Arbitrary Code Execution Vulnerability

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Adobe Bridge version 11.0 (and earlier) is affected by an out-of-bounds write vulnerability when parsing TTF files that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Adobe Bridge versiones 11.0 (y anteriores) está afectada por una vulnerabilidad de escritura fuera de límites al analizar archivos TTF que podría resultar en una ejecución de código arbitraria en el contexto del usuario actual. Una explotación de este problema requiere la interacción del usuario, ya que la víctima debe abrir un archivo malicioso

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Adobe Bridge. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the processing of embedded fonts. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

*Credits: Tran Van Khang \xe2\x80\x93 khangkito (VinCSS)

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

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-12-18 CVE Reserved
2021-01-12 CVE Published
2024-09-16 CVE Updated
2024-10-25 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-787: Out-of-bounds Write

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://helpx.adobe.com/security/products/bridge/apsb21-07.html	2023-11-07

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Adobe Search vendor "Adobe"	Bridge Search vendor "Adobe" for product "Bridge"	< 11.0.1 Search vendor "Adobe" for product "Bridge" and version " < 11.0.1"	-	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe