CVE-2023-38831
What it is
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.
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
- 2023-08-24 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
- 2023-09-14 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: 99.8% 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
- 2023-08-24
- Exploit probability
- 99.8% · EPSS, next 30 days
- Weakness
- CWE-345
- Record status
- Analyzed
Affected
- Rarlab Winrar < 6.23
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-2023-38831.md and follow it. Check whether this project is affected by CVE-2023-38831. 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/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