Buffer overflow in 7-Zip
CVE-2018-5996
Insufficient exception handling in the method NCompress::NRar3::CDecoder::Code of 7-Zip before 18.00 and p7zip can lead to multiple memory corruptions within the PPMd code, allows remote attackers to cause a denial of service (segmentation fault) or execute arbitrary code via a crafted RAR archive.
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: 0.029 (86.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.029 · newest: 0.029 · change: 0.000
Affected products
- 7-Zip
- 7-Zip P7zip
- Debian Linux — versions 7.0, 8.0, 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- landave.io/2018/01/7-zip-multiple-memory-corruptions-via-rar-and-zip/ (Technical Description, Exploit, Third Party Advisory)
- www.securitytracker.com/id/1040831 (vdb-entry)
- 0patch.blogspot.si/2018/02/two-interesting-micropatches-for-7-zip.html
- github.com/p7zip-project/p7zip/issues/8
- github.com/p7zip-project/p7zip/issues/32
Frequently asked questions
- What is CVE-2018-5996?
- CVE-2018-5996 is a high-severity vulnerability in 7-Zip, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2018-01-31.
- How severe is CVE-2018-5996?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2018-5996 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.