CVE-2019-5020
Published: 31 July 2019
An exploitable denial of service vulnerability exists in the object lookup functionality of Yara 3.8.1. A specially crafted binary file can cause a negative value to be read to satisfy an assert, resulting in Denial of Service. An attacker can create a malicious binary to trigger this vulnerability.
Notes
Author | Note |
---|---|
ebarretto | upstream fix introduced a regression, please check if all necessary commits are included when patching. |
Priority
Status
Package | Release | Status |
---|---|---|
yara Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not present)
|
disco |
Ignored
(end of life)
|
|
eoan |
Released
(3.9.0-1)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(3.9.0-1)
|
|
xenial |
Not vulnerable
(code not present)
|
|
Patches: upstream: https://github.com/VirusTotal/yara/commit/1ecb0e66431bf5c5b4c2fdf622be969eb5f4a7cc upstream: https://github.com/VirusTotal/yara/commit/a3784d3855029bd0ad24071e72746cc0c31b8cba |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 5.5 |
Attack vector | Local |
Attack complexity | Low |
Privileges required | None |
User interaction | Required |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |