CVE-2023-38831

RARLAB WinRAR Code Execution Vulnerability

CVE-2023-38831 is fixed in WinRAR on 1 platform by WinRAR 6.23.0 (version 6.23.0), released August 2, 2023. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on August 24, 2023, with known ransomware use. Patch Radar priority: Patch now.

Patch nowCISA KEVKnown ransomware use

CVSS

7.8

No vendor severity

Exploitation

Exploited

Reported by the vendor

CISA KEV

Aug 24, 2023

Federal due date Sep 14, 2023. Known ransomware use

EPSS

0.9982

99th percentile

RARLAB WinRAR before 6.23 allows attackers to execute arbitrary code when a user attempts to view a benign file within a ZIP archive. The issue occurs because a ZIP archive may include a benign file (such as an ordinary .JPG file) and also a folder that has the same name as the benign file, and the contents of the folder (which may include executable content) are processed during an attempt to access only the benign file. This was exploited in the wild in April through October 2023.

Where it's fixed

Product	Fixed in	Fix	Released
Windows apps
WinRAR	6.23.0	WinRAR 6.23.0	Aug 2, 2023

Details

Published
August 23, 2023
Weakness
CWE-351: Insufficient Type Distinction
CISA required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Vendor advisory
https://nvd.nist.gov/vuln/detail/CVE-2023-38831

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