CVE-2021-39856

Adobe Acrobat Reader DC NTLMv2 SSO Information Disclosure via LoadFile

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Acrobat Reader DC ActiveX Control versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by an Information Disclosure vulnerability. An unauthenticated attacker could leverage this vulnerability to obtain NTLMv2 credentials. Exploitation of this issue requires user interaction in that a victim must visit an attacker controlled web page.

Acrobat Reader DC versiones ActiveX Control 2021.005.20060 (y anteriores), versiones 2020.004.30006 (y anteriores), y versiones 2017.011.30199 (y anteriores), están afectadas por una vulnerabilidad de divulgación de información. Un atacante no autenticado podría aprovechar esta vulnerabilidad para obtener las credenciales de NTLMv2. Es requerida una interacción del usuario para explotar este problema, ya que la víctima debe visitar una página web controlada por el atacante

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-08-23 CVE Reserved
2021-09-29 CVE Published
2024-05-30 EPSS Updated
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://helpx.adobe.com/security/products/acrobat/apsb21-55.html	2022-02-05

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Adobe Search vendor "Adobe"	Acrobat Search vendor "Adobe" for product "Acrobat"	>= 17.011.30059 <= 17.011.30199 Search vendor "Adobe" for product "Acrobat" and version " >= 17.011.30059 <= 17.011.30199"	classic	Affected	in	Apple Search vendor "Apple"	Macos Search vendor "Apple" for product "Macos"	-	-	Safe
Adobe Search vendor "Adobe"	Acrobat Search vendor "Adobe" for product "Acrobat"	>= 17.011.30059 <= 17.011.30199 Search vendor "Adobe" for product "Acrobat" and version " >= 17.011.30059 <= 17.011.30199"	classic	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe
Adobe Search vendor "Adobe"	Acrobat Reader Search vendor "Adobe" for product "Acrobat Reader"	>= 17.011.30059 <= 17.011.30199 Search vendor "Adobe" for product "Acrobat Reader" and version " >= 17.011.30059 <= 17.011.30199"	classic	Affected	in	Apple Search vendor "Apple"	Macos Search vendor "Apple" for product "Macos"	-	-	Safe
Adobe Search vendor "Adobe"	Acrobat Reader Search vendor "Adobe" for product "Acrobat Reader"	>= 17.011.30059 <= 17.011.30199 Search vendor "Adobe" for product "Acrobat Reader" and version " >= 17.011.30059 <= 17.011.30199"	classic	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe
Adobe Search vendor "Adobe"	Acrobat Search vendor "Adobe" for product "Acrobat"	>= 20.001.30005 <= 20.004.30006 Search vendor "Adobe" for product "Acrobat" and version " >= 20.001.30005 <= 20.004.30006"	classic	Affected	in	Apple Search vendor "Apple"	Macos Search vendor "Apple" for product "Macos"	-	-	Safe
Adobe Search vendor "Adobe"	Acrobat Search vendor "Adobe" for product "Acrobat"	>= 20.001.30005 <= 20.004.30006 Search vendor "Adobe" for product "Acrobat" and version " >= 20.001.30005 <= 20.004.30006"	classic	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe
Adobe Search vendor "Adobe"	Acrobat Reader Search vendor "Adobe" for product "Acrobat Reader"	>= 20.001.30005 <= 20.004.30006 Search vendor "Adobe" for product "Acrobat Reader" and version " >= 20.001.30005 <= 20.004.30006"	classic	Affected	in	Apple Search vendor "Apple"	Macos Search vendor "Apple" for product "Macos"	-	-	Safe
Adobe Search vendor "Adobe"	Acrobat Reader Search vendor "Adobe" for product "Acrobat Reader"	>= 20.001.30005 <= 20.004.30006 Search vendor "Adobe" for product "Acrobat Reader" and version " >= 20.001.30005 <= 20.004.30006"	classic	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe
Adobe Search vendor "Adobe"	Acrobat Dc Search vendor "Adobe" for product "Acrobat Dc"	>= 15.008.20082 <= 21.005.20058 Search vendor "Adobe" for product "Acrobat Dc" and version " >= 15.008.20082 <= 21.005.20058"	continuous	Affected	in	Apple Search vendor "Apple"	Macos Search vendor "Apple" for product "Macos"	-	-	Safe
Adobe Search vendor "Adobe"	Acrobat Reader Dc Search vendor "Adobe" for product "Acrobat Reader Dc"	>= 15.008.20082 <= 21.005.20058 Search vendor "Adobe" for product "Acrobat Reader Dc" and version " >= 15.008.20082 <= 21.005.20058"	continuous	Affected	in	Apple Search vendor "Apple"	Macos Search vendor "Apple" for product "Macos"	-	-	Safe
Adobe Search vendor "Adobe"	Acrobat Dc Search vendor "Adobe" for product "Acrobat Dc"	>= 15.008.20082 <= 21.005.20060 Search vendor "Adobe" for product "Acrobat Dc" and version " >= 15.008.20082 <= 21.005.20060"	continuous	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe
Adobe Search vendor "Adobe"	Acrobat Reader Dc Search vendor "Adobe" for product "Acrobat Reader Dc"	>= 15.008.20082 <= 21.005.20060 Search vendor "Adobe" for product "Acrobat Reader Dc" and version " >= 15.008.20082 <= 21.005.20060"	continuous	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe