RARLAB WinRAR before 6.23 allows attackers to execute arbitrary code when a user attempts to view a benign file within a ZIP archive.
WinRAR versions before 6.23 are affected when a user opens a file inside a ZIP archive. CVSS scores this 7.8 (high), and no vendor severity rating is given. Fixed in WinRAR 6.23.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Fix
- Fixed in 6.23
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
WinRAR, the file archiving application for Windows, is affected. An attacker can craft a ZIP archive that, when a user simply tries to view a harmless file inside it, causes arbitrary code to run on the user's computer.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
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.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- n/a n/a
Version range not reported
References 5
group-ib.com
bleepingcomputer.com
news.ycombinator.com
packetstormsecurity.com
Questions about CVE-2023-38831
What does this mean?
The bug lets attackers run arbitrary code when a user tries to view a file inside a ZIP archive, even if that file is benign.Source: bleepingcomputer.com, group-ib.com
Am I affected, and how do I check?
WinRAR versions before 6.23 are affected. To check, compare the installed WinRAR version number against 6.23.Source: bleepingcomputer.com, group-ib.com
What should I do about it?
Update WinRAR to version 6.23, the fixed release that the vendor made available on August 2, 2023.Source: bleepingcomputer.com, group-ib.com
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2023-08-24, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data