Buffer overflow in Bzip3 - CVE-2023-29420
Published: August 18, 2023
Vulnerability identifier: #VU79706
CSH Severity: High
CVSS v4: 9.3 [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]
CVE-ID: CVE-2023-29420
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the bz3_decode_block() function in libbzip3.a. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Bzip3
Fedora
bzip3
Fedora
bzip3
How to mitigate CVE-2023-29420
Install updates from vendor's website.
Bzip3 - update to 1.2.3
bzip3 - addressed in versions 1.3.0-1.el8, 1.3.0-1.el9, 1.3.0-1.fc36, 1.3.0-1.fc37, 1.3.0-1.fc38
bzip3 - addressed in versions 1.3.0-1.el8, 1.3.0-1.el9, 1.3.0-1.fc36, 1.3.0-1.fc37, 1.3.0-1.fc38
External References
- https://github.com/kspalaiologos/bzip3/commit/bb06deb85f1c249838eb938e0dab271d4194f8fa
- https://github.com/kspalaiologos/bzip3/compare/1.2.2...1.2.3
- https://github.com/kspalaiologos/bzip3/issues/92
- 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/