CVE-2021-21044 : Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018

Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by an Out-of-bounds Write vulnerability when parsing a crafted jpeg 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.

Published 2021-02-11 20:15:16

Updated 2021-09-08 17:23:00

Source Adobe Systems Incorporated

View at NVD, CVE.org

Vulnerability category: Memory Corruption

Products affected by CVE-2021-21044

Adobe » Acrobat Reader » Classic Edition
Versions from including (>=) 17.0 and up to, including, (<=) 17.011.30188
cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:*
Matching versions
When used together with: Apple » Macos » Version: N/A
When used together with: Microsoft » Windows » Version: N/A
Adobe » Acrobat Reader » Classic Edition
Versions from including (>=) 20.0 and up to, including, (<=) 20.001.300183
cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:*
Matching versions
When used together with: Apple » Macos » Version: N/A
When used together with: Microsoft » Windows » Version: N/A
Adobe » Acrobat » Classic Edition
Versions from including (>=) 20.0 and up to, including, (<=) 20.001.30018
cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*
Matching versions
When used together with: Apple » Macos » Version: N/A
When used together with: Microsoft » Windows » Version: N/A
Adobe » Acrobat » Classic Edition
Versions from including (>=) 17.0 and up to, including, (<=) 17.011.30188
cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*
Matching versions
When used together with: Apple » Macos » Version: N/A
When used together with: Microsoft » Windows » Version: N/A
Adobe » Acrobat Dc » Continuous Edition
Versions up to, including, (<=) 20.013.20074
cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*
Matching versions
When used together with: Apple » Macos » Version: N/A
When used together with: Microsoft » Windows » Version: N/A
Adobe » Acrobat Reader Dc » Continuous Edition
Versions up to, including, (<=) 20.013.20074
cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*
Matching versions
When used together with: Apple » Macos » Version: N/A
When used together with: Microsoft » Windows » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2021-21044

EPSS FAQ

4.89%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 89 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-21044

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
9.3	HIGH	AV:N/AC:M/Au:N/C:C/I:C/A:C	8.6	10.0	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: Complete Integrity Impact: Complete Availability Impact: Complete
7.8	HIGH	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	1.8	5.9	Adobe Systems Incorporated
Attack Vector: Local Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2021-21044

CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

Assigned by: psirt@adobe.com (Primary)

References for CVE-2021-21044

https://helpx.adobe.com/security/products/acrobat/apsb21-09.html

Adobe Security Bulletin
Vendor Advisory

CVEs referencing this url

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Vulnerability Details : CVE-2021-21044

Products affected by CVE-2021-21044

Exploit prediction scoring system (EPSS) score for CVE-2021-21044

CVSS scores for CVE-2021-21044

CWE ids for CVE-2021-21044

References for CVE-2021-21044