Path Traversal in Check Point Software Technologies Ltd. Winrar
CVE-2018-20251
In WinRAR versions prior to and including 5.61, there is path traversal vulnerability when crafting the filename field of the ACE format. The UNACE module (UNACEV2.dll) creates files and folders as written in the filename field even when WinRAR validator noticed the traversal attempt and requestd to abort the extraction process. the operation is cancelled only after the folders and files were created but prior to them being written, therefore allowing the attacker to create empty files and folders everywhere in the file system.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.315 (98.2th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.315 · newest: 0.315 · change: 0.000
Affected products
- Check Point Software Technologies Ltd. Winrar — versions All versions prior and including 5.61
- Rarlab Winrar
Weakness classification (CWE)
Public proof-of-concept exploits
References
- research.checkpoint.com/extracting-code-execution-from-winrar/ (Exploit, Third Party Advisory)
- www.securityfocus.com/bid/106948 (VDB Entry, Third Party Advisory, vdb-entry)
- www.win-rar.com/whatsnew.html (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2018-20251?
- CVE-2018-20251 is a medium-severity vulnerability in Check Point Software Technologies Ltd. Winrar, classified under Protection Mechanism Failure. CVSS score: 5.5/10. Published 2019-02-05.
- How severe is CVE-2018-20251?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2018-20251 known to be exploited?
- 10 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.