# CVE-2023-38831

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.

- Page: https://www.vulneraibility.com/cve/CVE-2023-38831
- CVSS: 7.8
- Known exploited: yes, in CISA KEV since 2023-08-24; CISA due date 2023-09-14; known ransomware use
- EPSS: 99.81% (percentile 100.0)
- Public exploit code: 1 Metasploit module · 60 GitHub proofs of concept (first 2023-08-24)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2023-08-23)
- Weakness: CWE-351
- Published: 2023-08-23

## Affected

- rarlab:winrar

## References

- [other] https://www.group-ib.com/blog/cve-2023-38831-winrar-zero-day/
- [other] https://www.bleepingcomputer.com/news/security/winrar-zero-day-exploited-since-april-to-hack-trading-accounts/
- [other] https://news.ycombinator.com/item?id=37236100
- [other] http://packetstormsecurity.com/files/174573/WinRAR-Remote-Code-Execution.html
- [other] https://blog.google/threat-analysis-group/government-backed-actors-exploiting-winrar-vulnerability/
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-38831

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.