CVE-2018-20250
HIGH severity · CVSS 7.8 · CWE-36 · actively exploited (CISA KEV)
7.8CVSS HIGH exploited ransomware
Actively exploited in the wild (CISA Known Exploited Vulnerabilities).
Known use in ransomware campaigns. Added to KEV 2022-02-15. US federal agencies must patch by 2022-08-15.
Summary
In WinRAR versions prior to and including 5.61, There is path traversal vulnerability when crafting the filename field of the ACE format (in UNACEV2.dll). When the filename field is manipulated with specific patterns, the destination (extraction) folder is ignored, thus treating the filename as an absolute path.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredNone
User interactionRequired
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)96%
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
This vulnerability is being actively exploited in the wild — patch affected products urgently. Open any affected product above for its exact safe version.
Additional information
- NVD record
- http://www.rapid7.com/db/modules/exploit/windows/fileformat/winrar_aceAdvisory
- http://www.securityfocus.com/bid/106948Advisory
- https://www.win-rar.com/whatsnew.html
- http://packetstormsecurity.com/files/152618/RARLAB-WinRAR-ACE-Format-Input-Validation-Remote-Code-Execution.htmlAdvisory
- https://github.com/blau72/CVE-2018-20250-WinRAR-ACEAdvisory
- https://research.checkpoint.com/extracting-code-execution-from-winrar/Advisory
- https://www.exploit-db.com/exploits/46552/Advisory
- https://www.exploit-db.com/exploits/46756/Advisory