PT-2021-6144 · Adobe · Acrobat Reader

Published 2021-07-13 · Updated 2021-08-31 · CVE-2021-28636

Positive Technologies (AI Summary)

CVSS v2.0

8.5

High

Base vector

AV:N/AC:M/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Acrobat Reader DC versions 2021.005.20054 and earlier Acrobat Reader DC versions 2020.004.30005 and earlier Acrobat Reader DC versions 2017.011.30197 and earlier

Description The issue is related to an Uncontrolled Search Path Element vulnerability. An attacker with access to the victim's C:/ folder could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction, where a victim must open a malicious file.

Recommendations For Acrobat Reader DC versions 2021.005.20054 and earlier, update to a version later than 2021.005.20054 to resolve the issue. For Acrobat Reader DC versions 2020.004.30005 and earlier, update to a version later than 2020.004.30005 to resolve the issue. For Acrobat Reader DC versions 2017.011.30197 and earlier, update to a version later than 2017.011.30197 to resolve the issue. As a temporary workaround, consider restricting access to the C:/ folder to minimize the risk of exploitation.

Fix

Uncontrolled Search Path Element

Weakness Enumeration

CWE-427

Related Identifiers

BDU:2022-01009

CVE-2021-28636

Affected Products

Acrobat Reader

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2021-28636 · Security Note
• https://bdu.fstec.ru/vul/2022-01009 · Security Note
• https://osv.dev/vulnerability/CVE-2021-28636 · Vendor Advisory
• https://helpx.adobe.com/security/products/acrobat/apsb21-51.html · Vendor Advisory
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28636 · Note
• https://t.me/cibsecurity/27652 · Telegram Post