VulnerabilityModified
CVE-2018-19975
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.
MEDIUM 5.5EPSS 1.35%
Does this matter?
Lower severity and a low EPSS score (1.35%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.0
- 5.5 MEDIUMCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- EPSS
- 1.35% probability · 70th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- virustotal/yara
- Source
- cve@mitre.org
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/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.