Vulnerability in Rarlab Winrar
CVE-2023-40477
RARLAB WinRAR Recovery Volume Improper Validation of Array Index Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of RARLAB WinRAR. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the processing of recovery volumes. The issue results from the lack of proper validation of user-supplied data, which can result in a memory access past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-21233.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.114 (95.9th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.114 · newest: 0.114 · change: 0.000
Affected products
- Rarlab Winrar — versions 6.21
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.zerodayinitiative.com/advisories/ZDI-23-1152/ (x_research-advisory, VDB Entry, Third Party Advisory)
- www.win-rar.com/singlenewsview.html (vendor-advisory, Release Notes)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2023-40477?
- CVE-2023-40477 is a high-severity vulnerability in Rarlab Winrar, classified under Improper Validation of Array Index. CVSS score: 7.8/10. Published 2024-05-03.
- How severe is CVE-2023-40477?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2023-40477 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.