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CVE-2017-5923

Published: 3 April 2017

libyara/grammar.y in YARA 3.5.0 allows remote attackers to cause a denial of service (heap-based out-of-bounds read and application crash) via a crafted rule that is mishandled in the yara_yyparse function.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
yara
Launchpad, Ubuntu, Debian
artful Ignored
(end of life)
bionic Not vulnerable
(3.5.0+dfsg-9)
cosmic Not vulnerable
(3.5.0+dfsg-9)
impish Not vulnerable
(3.5.0+dfsg-9)
groovy Not vulnerable
(3.5.0+dfsg-9)
xenial Needed

kinetic Not vulnerable
(3.5.0+dfsg-9)
lunar Not vulnerable
(3.5.0+dfsg-9)
disco Not vulnerable
(3.5.0+dfsg-9)
eoan Not vulnerable
(3.5.0+dfsg-9)
focal Not vulnerable
(3.5.0+dfsg-9)
hirsute Not vulnerable
(3.5.0+dfsg-9)
jammy Not vulnerable
(3.5.0+dfsg-9)
precise Does not exist

trusty Does not exist
(trusty was needs-triage)
upstream Needed

yakkety Ignored
(end of life)
zesty Ignored
(end of life)
mantic Not vulnerable
(3.5.0+dfsg-9)
Patches:
upstream: https://github.com/VirusTotal/yara/commit/ab906da53ff2a68c6fd6d1fa73f2b7c7bf0bc636

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H