CVE-2018-20250
What it is
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.
At a glance
- Exploitability
- Can be exploited locally on the machine without logging in, but needs a user to act. High risk of data exposure, data tampering, service disruption.
- In the wild
- CISA lists this as exploited in real attacks. Treat as urgent.
- Fix
- No patch or advisory is linked yet. Look at mitigations or restrict exposure.
Timeline
- ReservedThe CVE id was reserved by its CNA
- PublishedDisclosed publicly on CVE.org and NVD
- 2022-02-15 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
- 2022-08-15 Remediation deadlineCISA's due date for federal agencies to fix it
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
- Exploit odds: 96.0% in the next 30 days (EPSS).
- Severity: 7.8 HIGH (CVSS).
- Fix: none linked yet, which raises it.
Details
- Published
- Last modified
- Added to CISA KEV
- 2022-02-15
- Exploit probability
- 96.0% · EPSS, next 30 days
- Weakness
- CWE-36
- Record status
- Analyzed
Affected
- Rarlab Winrar ≤ 5.61
Attack profile CVSS 3.1 · 7.8
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2018-20250.md and follow it. Check whether this project is affected by CVE-2018-20250. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
References
- http://packetstormsecurity.com/files/152618/RARLAB-WinRAR-ACE-Format-Input-Validation-Remote-Code-Execution.html
- http://www.rapid7.com/db/modules/exploit/windows/fileformat/winrar_ace
- http://www.securityfocus.com/bid/106948
- https://github.com/blau72/CVE-2018-20250-WinRAR-ACE
- https://research.checkpoint.com/extracting-code-execution-from-winrar/
- https://www.exploit-db.com/exploits/46552/
- https://www.exploit-db.com/exploits/46756/
- https://www.win-rar.com/whatsnew.html
- http://packetstormsecurity.com/files/152618/RARLAB-WinRAR-ACE-Format-Input-Validation-Remote-Code-Execution.html
- http://www.rapid7.com/db/modules/exploit/windows/fileformat/winrar_ace
- http://www.securityfocus.com/bid/106948
- https://github.com/blau72/CVE-2018-20250-WinRAR-ACE
- https://research.checkpoint.com/extracting-code-execution-from-winrar/
- https://www.exploit-db.com/exploits/46552/
- https://www.exploit-db.com/exploits/46756/
- https://www.win-rar.com/whatsnew.html
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-20250