CVE-2018-19974

In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memory in libyara/exec.c. This can allow attackers to discover addresses in the real stack (not the YARA virtual stack).
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.5 MEDIUM
LOCAL
LOW
NONE
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 50%
VendorProductVersion
virustotalyara
3.8.1
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
yara
bullseye
4.0.5-1
fixed
stretch
no-dsa
jessie
no-dsa
bookworm
4.2.3-4
fixed
sid
4.5.2-1
fixed
trixie
4.5.2-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
yara
noble
needs-triage
mantic
ignored
lunar
ignored
kinetic
ignored
jammy
needs-triage
impish
ignored
hirsute
ignored
groovy
ignored
focal
needs-triage
eoan
ignored
disco
not-affected
cosmic
ignored
bionic
needs-triage
xenial
needs-triage
trusty
dne
Common Weakness Enumeration
References
https://bnbdr.github.io/posts/extracheese/
https://github.com/VirusTotal/yara/issues/999
https://github.com/bnbdr/swisscheese/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DFFXDAMP6GJ337LIOTVF5I4T6QGMN3ZR/
https://bnbdr.github.io/posts/extracheese/
https://github.com/VirusTotal/yara/issues/999
https://github.com/bnbdr/swisscheese/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DFFXDAMP6GJ337LIOTVF5I4T6QGMN3ZR/