CVE-2018-5996

moderate-risk
Published 2018-01-31

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.

Do I need to act?

~
4.5% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.8/10 High
LOCAL / LOW complexity

Affected Products (5)

P7Zip

Affected Vendors

Debian 7-Zip

References (8)

http://www.securitytracker.com/id/1040831
https://0patch.blogspot.si/2018/02/two-interesting-micropatches-for-7-zip.html
https://github.com/p7zip-project/p7zip/issues/32
https://github.com/p7zip-project/p7zip/issues/8
Exploit https://landave.io/2018/01/7-zip-multiple-memory-corruptions-via-rar-and-zip/
http://www.securitytracker.com/id/1040831
https://0patch.blogspot.si/2018/02/two-interesting-micropatches-for-7-zip.html
Exploit https://landave.io/2018/01/7-zip-multiple-memory-corruptions-via-rar-and-zip/
44
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 8/34 · Low
Exposure 12/34 · Low