CVE-2023-38831 KEV
7.8
HIGH · CVSS 3.1 · EPSS 99.8% (pctl 100)
Patch first
On CISA KEV — known exploited in the wild, due 2023-09-14.
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.
Scoring
| CVSS | 7.8 (HIGH, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| EPSS | 99.82% — more likely to be exploited than 100% of all CVEs |
| Weakness | CWE-345 |
| On CISA KEV | yes — remediate by 2023-09-14 |
| Public exploit | none known |
| Published | 2023-08-23 |
| Last modified | 2026-08-05 |
CISA KEV
| Name | RARLAB WinRAR Code Execution Vulnerability |
|---|---|
| Added | 2023-08-24 |
| Due | 2023-09-14 |
| Vendor / product | RARLAB / WinRAR |
| Ransomware use | known |
Affected (1)
| Vendor | Product |
|---|---|
| rarlab | winrar |
References
- http://packetstormsecurity.com/files/174573/WinRAR-Remote-Code-Execution.html
- https://blog.google/threat-analysis-group/government-backed-actors-exploiting-winrar-vulnerability/
- https://news.ycombinator.com/item?id=37236100
- https://www.bleepingcomputer.com/news/security/winrar-zero-day-exploited-since-april-to-hack-trading-accounts/
- https://www.group-ib.com/blog/cve-2023-38831-winrar-zero-day/
- http://packetstormsecurity.com/files/174573/WinRAR-Remote-Code-Execution.html
- https://blog.google/threat-analysis-group/government-backed-actors-exploiting-winrar-vulnerability/
- https://news.ycombinator.com/item?id=37236100
- https://www.bleepingcomputer.com/news/security/winrar-zero-day-exploited-since-april-to-hack-trading-accounts/
- 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
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