CVE-2021-21034 : 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 Read vulnerability. An unauthenticated attacker could leverage this vulnerability to locally elevate privileges 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 20:15:15

Updated 2021-09-14 18:42:28

Source Adobe Systems Incorporated

View at NVD, CVE.org

Products affected by CVE-2021-21034

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-2021-21034

EPSS FAQ

1.01%

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

~ 75 %

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

CVSS scores for CVE-2021-21034

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.3	MEDIUM	AV:N/AC:M/Au:N/C:P/I:N/A:N	8.6	2.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: Partial Integrity Impact: None Availability Impact: None
4.3	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N	2.8	1.4	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Unchanged Confidentiality: Low Integrity: None Availability: None
4.3	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N	2.8	1.4	Adobe Systems Incorporated
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Unchanged Confidentiality: Low Integrity: None Availability: None

CWE ids for CVE-2021-21034

CWE-125 Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.
Assigned by:
- nvd@nist.gov (Primary)
- psirt@adobe.com (Secondary)

References for CVE-2021-21034

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-2021-21034

Products affected by CVE-2021-21034

Exploit prediction scoring system (EPSS) score for CVE-2021-21034

CVSS scores for CVE-2021-21034

CWE ids for CVE-2021-21034

References for CVE-2021-21034