Out-of-bounds write in Bzip3 - CVE-2023-29421
Published: August 18, 2023
Vulnerability identifier: #VU79707
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2023-29421
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Bzip3 Project
Affected software:
Bzip3
Bzip3
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error within the bz3_decode_block() function in libbzip3.a. A remote attacker can trigger an out-of-bounds write and execute arbitrary code on the target system.
How to mitigate CVE-2023-29421
Install updates from vendor's website.
Sources
- https://github.com/kspalaiologos/bzip3/compare/1.2.2...1.2.3
- https://github.com/kspalaiologos/bzip3/issues/94
- 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/