CVE Vulnerabilities

CVE-2017-5924

Use After Free

Published: Apr 03, 2017 | Modified: Apr 20, 2025
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM

libyara/grammar.y in YARA 3.5.0 allows remote attackers to cause a denial of service (use-after-free and application crash) via a crafted rule that is mishandled in the yr_compiler_destroy function.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

Name Vendor Start Version End Version
Yara Virustotal 3.5.0 (including) 3.5.0 (including)
Yara Ubuntu artful *
Yara Ubuntu esm-apps/xenial *
Yara Ubuntu trusty *
Yara Ubuntu upstream *
Yara Ubuntu xenial *
Yara Ubuntu yakkety *
Yara Ubuntu zesty *

Potential Mitigations

References