Vulnerability · Published Apr 6, 2023 · Assigned by mitre
CVE-2023-29421
High 8.8
In plain English
A high-severity out-of-bounds write in the bzip3 package (Debian). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.9%top 39.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
An issue was discovered in libbzip3.a in bzip3 before 1.2.3. There is an out-of-bounds write in bz3_decode_block.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | bzip3 | 1.2.2-2 | DEBIAN-CVE-2023-29421 |
| Debian:13 | bzip3 | 1.2.2-2 | DEBIAN-CVE-2023-29421 |
| Debian:14 | bzip3 | 1.2.2-2 | DEBIAN-CVE-2023-29421 |
| Ubuntu:24.04:LTS | bzip3 | no fix listed | UBUNTU-CVE-2023-29421 |
Affected products (as reported)
Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References
- https://github.com/kspalaiologos/bzip3/compare/1.2.2...1.2.3
- https://github.com/kspalaiologos/bzip3/issues/94
- FEDORA-2023-3a821e6e73 vendor-advisory
- FEDORA-2023-c08f9dfc16 vendor-advisory
- FEDORA-2023-3589ad1c55 vendor-advisory