Vulnerability CVE-2021-28546

Vulnerability Name:

CVE-2021-28546 (CCN-199321)

Assigned:

2021-02-09

Published:

2021-02-09

Updated:

2021-09-14

Summary:

Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are missing support for an integrity check. An unauthenticated attacker could leverage this vulnerability to modify content in a certified PDF without invalidating the certification. Exploitation of this issue requires user interaction in that a victim must open the tampered file.

CVSS v3 Severity:

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

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

7.1 High (CCN 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 (CCN 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

CVSS v2 Severity:

4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N)

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

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

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

Vulnerability Type:

CWE-353

Vulnerability Consequences:

Bypass Security

References:

Source: MITRE
Type: CNA
CVE-2021-28546

Source: XF
Type: UNKNOWN
adobe-reader-cve202128546-sec-bypass(199321)

Source: CCN
Type: Adobe Security Bulletin APSB21-09
Security bulletin for Adobe Acrobat and Reader

Source: MISC
Type: Vendor Advisory
https://helpx.adobe.com/security/products/acrobat/apsb21-09.html

Vulnerable Configuration:

Configuration 1:

cpe:/a:adobe:acrobat:*:*:*:*:classic:*:*:* (Version >= 17.011.30059 and <= 17.011.30188)

OR cpe:/a:adobe:acrobat:*:*:*:*:classic:*:*:* (Version >= 20.001.30005 and <= 20.001.30018)

OR cpe:/a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:* (Version >= 15.008.20082 and <= 20.013.20074)

OR cpe:/a:adobe:acrobat_reader:*:*:*:*:classic:*:*:* (Version >= 17.011.30059 and <= 17.011.30188)

OR cpe:/a:adobe:acrobat_reader:*:*:*:*:classic:*:*:* (Version >= 20.001.30005 and <= 20.001.30018)

OR cpe:/a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:* (Version >= 15.008.20082 and <= 20.013.20074)

AND

cpe:/o:apple:macos:-:*:*:*:*:*:*:*

OR cpe:/o:microsoft:windows:-:*:*:*:*:*:*:*

Denotes that component is vulnerable

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