CVE-2018-20250

high-risk
Published 2019-02-05

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.

Do I need to act?

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93.5% chance of exploitation in next 30 days
EPSS score — higher than 7% of all CVEs
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CISA KEV: actively exploited in the wild
On the Known Exploited Vulnerabilities catalog — federal agencies must patch
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2 public exploits available
46756, 46552
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.8/10 High
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Rarlab

References (17)

Exploit http://packetstormsecurity.com/files/152618/RARLAB-WinRAR-ACE-Format-Input-Valid...
Third Party Advisory http://www.rapid7.com/db/modules/exploit/windows/fileformat/winrar_ace
Broken Link http://www.securityfocus.com/bid/106948
Exploit https://github.com/blau72/CVE-2018-20250-WinRAR-ACE
Exploit https://research.checkpoint.com/extracting-code-execution-from-winrar/
Exploit https://www.exploit-db.com/exploits/46552/
Exploit https://www.exploit-db.com/exploits/46756/
Release Notes https://www.win-rar.com/whatsnew.html
Exploit http://packetstormsecurity.com/files/152618/RARLAB-WinRAR-ACE-Format-Input-Valid...
Third Party Advisory http://www.rapid7.com/db/modules/exploit/windows/fileformat/winrar_ace
Broken Link http://www.securityfocus.com/bid/106948
Exploit https://github.com/blau72/CVE-2018-20250-WinRAR-ACE
Exploit https://research.checkpoint.com/extracting-code-execution-from-winrar/
Exploit https://www.exploit-db.com/exploits/46552/
Exploit https://www.exploit-db.com/exploits/46756/
Release Notes https://www.win-rar.com/whatsnew.html
US Government Resource https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-...
63
/ 100
high-risk
Severity 24/34 · High
Exploitability 34/34 · Critical
Exposure 5/34 · Minimal