CVE-2023-40890

Publication date 29 August 2023

Last updated 2 July 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A stack-based buffer overflow vulnerability exists in the lookup_sequence function of ZBar 0.23.90. Specially crafted QR codes may lead to information disclosure and/or arbitrary code execution. To trigger this vulnerability, an attacker can digitally input the malicious QR code, or prepare it to be physically scanned by the vulnerable scanner.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
zbar	25.10 questing	Needs evaluation
	25.04 plucky	Needs evaluation
	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Ignored end of life, was needs-triage
	23.04 lunar	Ignored end of life, was needs-triage
	22.04 LTS jammy	Fixed 0.23.92-4ubuntu0.1~esm1
	20.04 LTS focal	Fixed 0.23-1.3ubuntu0.1~esm1
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
zbar	Upstream: 012a030

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-7118-1
ZBar vulnerabilities
21 November 2024