CVE-2023-40857

Publication date 28 August 2023

Last updated 3 March 2026

Ubuntu priority

Cvss 3 Severity Score

Description

Buffer Overflow vulnerability in VirusTotal yara v.4.3.2 allows a remote attacker to execute arbtirary code via the yr_execute_cod function in the exe.c component.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
yara	25.10 questing	Ignored rejected upstream
	25.04 plucky	Ignored end of life, was needs-triage
	24.10 oracular	Ignored end of life, was needs-triage
	24.04 LTS noble	Ignored rejected upstream
	23.10 mantic	Ignored end of life, was needs-triage
	23.04 lunar	Ignored end of life, was needs-triage
	22.04 LTS jammy	Ignored rejected upstream
	20.04 LTS focal	Ignored end of standard support, was needs-triage
	18.04 LTS bionic	Ignored end of standard support
	16.04 LTS xenial	Ignored end of standard support
	14.04 LTS trusty	Ignored end of standard support

Notes

john-breton

This is not a real security vulnerability per upstream. Marking as ignored since there's no fix due to the attack vector being an unsupported feature of yara that inherently comes with security risks when exercised.

Severity score breakdown

Parameter	Value
Base score	8.8 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H