Denial of service in bzip3

Published: 2023-08-18

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-29416 CVE-2023-29415
CWE-ID	CWE-787 CWE-20
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Bzip3 Universal components / Libraries / Libraries used by multiple products
Vendor	Bzip3 Project

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds write

EUVDB-ID: #VU79703

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-29416

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error when processing untrusted input in libbzip3.a. A remote attacker can trigger an out-of-bounds write and crash the application.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Bzip3: 1.0.0 - 1.2.3

CPE2.3

External links

https://github.com/kspalaiologos/bzip3/issues/92
https://github.com/kspalaiologos/bzip3/compare/1.2.3...1.3.0
https://github.com/kspalaiologos/bzip3/commit/bfa5bf82b53715dfedf048e5859a46cf248668ff
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NA7S7HDUAINOTCSWQZ5LIW756DYY22V2/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4JLSE25SV7K2NB6FTFT4UHJOJUHBHYHY/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NMLFV2FJK3CM7NJLVPZI5RUAFQZICPWW/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Input validation error

EUVDB-ID: #VU79702