Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2021-39839

Severity CVSS v4.0:
Pending analysis
Type:
CWE-416 Use After Free
Publication date:
29/09/2021
Last modified:
07/11/2023

Description

Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a use-after-free vulnerability in the processing of the AcroForm getItem action 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.

Impact

Vector 3.x
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
7.80
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:M/Au:N/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 6.80 MEDIUM
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0
6.80
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:* 20.001.30005 (including) 20.004.30006 (including)
cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:* 20.001.30005 (including) 20.004.30006 (including)
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:* 15.008.20082 (including) 21.005.20058 (including)
cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:* 15.008.20082 (including) 21.005.20058 (including)
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*
cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:* 15.008.20082 (including) 21.005.20060 (including)
cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:* 15.008.20082 (including) 21.005.20060 (including)
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:* 17.011.30059 (including) 17.011.30199 (including)
cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:* 17.011.30059 (including) 17.011.30199 (including)
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools