CVE-2021-21094

Adobe Bridge PDF File Parsing Out-Of-Bounds Write vulnerability could lead to arbitrary code execution

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 versions 10.1.1 (and earlier) and 11.0.1 (and earlier) are affected by an Out-of-bounds write vulnerability when parsing a specially crafted file. An unauthenticated attacker could leverage this vulnerability to achieve 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 10.1.1 (y anteriores) y versiones 11.0.1 (y anteriores), están afectadas por una vulnerabilidad de escritura fuera de límites cuando analiza un archivo especialmente diseñado. Un atacante no autenticado podría aprovechar esta vulnerabilidad para lograr una ejecución de código arbitraria en el contexto del usuario actual. Es requerida una interacción del usuario para explotar este problema, 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 PDF files. 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: Francis Provencher {PRL}

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
2021-04-15 CVE Published
2024-09-16 CVE Updated
2024-11-10 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-787: Out-of-bounds Write

CAPEC

References (2)

URL	Tag	Source
https://www.zerodayinitiative.com/advisories/ZDI-21-416	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://helpx.adobe.com/security/products/bridge/apsb21-23.html	2023-11-07

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"	>= 10.0 <= 10.1.1 Search vendor "Adobe" for product "Bridge" and version " >= 10.0 <= 10.1.1"	-	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe
Adobe Search vendor "Adobe"	Bridge Search vendor "Adobe" for product "Bridge"	>= 11.0 <= 11.0.1 Search vendor "Adobe" for product "Bridge" and version " >= 11.0 <= 11.0.1"	-	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe