CVE-2023-38831
Act now ● On CISA KEV — actively exploited used in ransomware
Actively exploited — on the CISA KEV list.
CVSS base
7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
98.0%
99.9th percentile
CISA KEV
Listed
Added 2023-08-24 · patch by 2023-09-14
Weakness / dates
CWE-351
Published 2023-08-23 · modified 2026-08-05
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.
Affected
References
- exploit http://packetstormsecurity.com/files/174573/WinRAR-Remote-Code-Execution.html
- exploit https://blog.google/threat-analysis-group/government-backed-actors-exploiting-winrar-vulnerability/
- https://news.ycombinator.com/item?id=37236100
- exploit https://www.bleepingcomputer.com/news/security/winrar-zero-day-exploited-since-april-to-hack-trading-accounts/
- exploit https://www.group-ib.com/blog/cve-2023-38831-winrar-zero-day/
- exploit http://packetstormsecurity.com/files/174573/WinRAR-Remote-Code-Execution.html
- exploit https://blog.google/threat-analysis-group/government-backed-actors-exploiting-winrar-vulnerability/
- https://news.ycombinator.com/item?id=37236100
- exploit https://www.bleepingcomputer.com/news/security/winrar-zero-day-exploited-since-april-to-hack-trading-accounts/
- exploit https://www.group-ib.com/blog/cve-2023-38831-winrar-zero-day/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-38831