CVE-2017-5923: 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…

PriorityP430high7.5CVSS 3.0

AVNACLPRNUINSUCNINAH

EPSS

1.65%

73.8th percentile

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.

Affected

9 ranges

Vendor	Product	Version range	Fixed in
debian	yara	< yara 3.5.0+dfsg-9 (bookworm)	yara 3.5.0+dfsg-9 (bookworm)
virustotal	yara	—	—
virustotal	yara	>= 0 < 3.5.0+dfsg-9	3.5.0+dfsg-9
virustotal	yara	>= 0 < 3.5.0+dfsg-9	3.5.0+dfsg-9
virustotal	yara	>= 0 < 3.5.0+dfsg-9	3.5.0+dfsg-9
virustotal	yara	>= 0 < 3.5.0+dfsg-9	3.5.0+dfsg-9
virustotal	yara	>= 0 < 3.4.0+dfsg-2ubuntu0.1~esm1	3.4.0+dfsg-2ubuntu0.1~esm1
virustotal	yara	>= 0 < 3.7.1-1ubuntu2+esm1	3.7.1-1ubuntu2+esm1
virustotal	yara	>= 0 < 3.9.0-1ubuntu0.1~esm1	3.9.0-1ubuntu0.1~esm1

CVSS provenance

nvdv3.07.5HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P

osv7.5HIGH

vendor_debian7.5HIGH

vendor_ubuntu7.5HIGH

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.