RARLAB WinRAR Code Execution Vulnerability
RARLAB WinRAR contains an unspecified vulnerability that allows an attacker to execute code when a user attempts to view a benign file within a ZIP archive.
A local attacker, without authentication, can achieve full data confidentiality loss, arbitrary modification of data, complete denial of service or system unavailability. CISA has confirmed use of this vulnerability in known ransomware campaigns — treat as high priority for remediation. Federal agencies are required to remediate by 2023-09-14 under CISA BOD 22-01.
This is a Software Vulnerability (CWE-345) (CWE-345) vulnerability in RARLAB WinRAR. Exploitation requires local access, low attack complexity, no authentication required, and user interaction required.
Probably yes if any of these apply:
Used in known ransomware campaigns. Threat-research write-up: http://packetstormsecurity.com/files/174573/WinRAR-Remote-Code-Execution.html
Manual remediation steps
Apply the Vendor Patch
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog — apply the vendor's security update as soon as possible.
CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
References
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References