Buffer overflow in 7-Zip
CVE-2023-40481
7-Zip SquashFS File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. 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 parsing of SQFS files. The issue results from the lack of proper validation of user-supplied data, which can result in a write 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-18589.
Vulnerability class: Buffer Overflow
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: 0.139 (96.4th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.253 · newest: 0.139 · change: -0.114
Affected products
- 7-Zip — versions 22.01
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.zerodayinitiative.com/advisories/ZDI-23-1164/ (x_research-advisory, Third Party Advisory)
- sourceforge.net/p/sevenzip/discussion/45797/thread/713c8a8269/ (Product, vendor-advisory, Release Notes)
Frequently asked questions
- What is CVE-2023-40481?
- CVE-2023-40481 is a high-severity vulnerability in 7-Zip, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2024-05-03.
- How severe is CVE-2023-40481?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2023-40481 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.