Vulnerability CVE-2021-28637

Vulnerability Name:

CVE-2021-28637 (CCN-205049)

Assigned:

2021-07-13

Published:

2021-07-13

Updated:

2021-08-31

Summary:

Acrobat Reader DC versions 2021.005.20054 (and earlier), 2020.004.30005 (and earlier) and 2017.011.30197 (and earlier) are affected by an out-of-bounds read vulnerability. An unauthenticated attacker could leverage this vulnerability achieve arbitrary read / write system information in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

CVSS v3 Severity:

7.1 High (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N)
6.2 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C)

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

6.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N)
5.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): High Privileges Required (PR): None User Interaction (UI): Required
Scope:	Scope (S): Changed
Impact Metrics:	Confidentiality (C): High Integrity (I): Low Availibility (A): None

CVSS v2 Severity:

8.8 High (CVSS v2 Vector: AV:N/AC:M/Au:N/C:C/I:C/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Medium Authentication (Au): None
Impact Metrics:	Confidentiality (C): Complete Integrity (I): Complete Availibility (A): None

4.5 Medium (CCN CVSS v2 Vector: AV:L/AC:H/Au:S/C:C/I:P/A:N)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): High Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): Complete Integrity (I): Partial Availibility (A): None

Vulnerability Type:

CWE-125

Vulnerability Consequences:

Obtain Information

References:

Source: MITRE
Type: CNA
CVE-2021-28637

Source: XF
Type: UNKNOWN
adobe-reader-cve202128637-info-disc(205049)

Source: CCN
Type: Adobe Security Bulletin APSB21-51
Security update available for Adobe Acrobat and Reader

Source: MISC
Type: Release Notes, Vendor Advisory
https://helpx.adobe.com/security/products/acrobat/apsb21-51.html

Vulnerable Configuration:

Configuration 1:

cpe:/a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:* (Version >= 15.008.20082 and <= 21.005.20054)

OR cpe:/a:adobe:acrobat_dc:*:*:*:*:classic:*:*:* (Version >= 17.011.30059 and <= 17.011.30197)

OR cpe:/a:adobe:acrobat_dc:*:*:*:*:classic:*:*:* (Version >= 20.001.30005 and <= 20.004.30005)

OR cpe:/a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:* (Version >= 15.008.20082 and <= 21.005.20054)

OR cpe:/a:adobe:acrobat_reader_dc:*:*:*:*:classic:*:*:* (Version >= 17.011.30059 and <= 17.011.30197)

OR cpe:/a:adobe:acrobat_reader_dc:*:*:*:*:classic:*:*:* (Version >= 20.001.30005 and <= 20.004.30005)

Denotes that component is vulnerable

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