Description
In YARA 3.8.1, bytecode in a specially crafted compiled rule can read data from any arbitrary address in memory, in libyara/exec.c. Specifically, OP_COUNT can read a DWORD.
Metrics
CVSS 3.0 5.5/10
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
References
- https://bnbdr.github.io/posts/extracheese/Exploit, Third Party Advisory
- https://github.com/VirusTotal/yara/issues/999Exploit, Issue Tracking, Third Party Advisory
- https://github.com/bnbdr/swisscheese/Exploit, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DFFXDAMP6GJ337LIOTVF5I4T6QGMN3ZR/
- https://bnbdr.github.io/posts/extracheese/Exploit, Third Party Advisory
- https://github.com/VirusTotal/yara/issues/999Exploit, Issue Tracking, Third Party Advisory
- https://github.com/bnbdr/swisscheese/Exploit, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DFFXDAMP6GJ337LIOTVF5I4T6QGMN3ZR/
Timeline
- Published
- Dec 17, 2018
- Last modified
- Jun 17, 2026
- NVD status
- Modified