Vulnerability · Published May 24, 2022 · Assigned by mitre
CVE-2021-42612
High 7.8
In plain English
A high-severity security flaw in the halibut package (Debian). There are no confirmed reports of exploitation so far. 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 NVD)7.8High
Exploit odds (30 days)0.9%top 40.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
A use after free in cleanup_index in index.c in Halibut 1.2 allows an attacker to cause a segmentation fault or possibly have other unspecified impact via a crafted text document.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | halibut | 1.3-1 | DEBIAN-CVE-2021-42612 |
| Debian:13 | halibut | 1.3-1 | DEBIAN-CVE-2021-42612 |
| Debian:14 | halibut | 1.3-1 | DEBIAN-CVE-2021-42612 |
| Ubuntu:22.04:LTS | halibut | no fix listed | UBUNTU-CVE-2021-42612 |
| Ubuntu:24.04:LTS | halibut | no fix listed | UBUNTU-CVE-2021-42612 |
| Ubuntu:25.10 | halibut | no fix listed | UBUNTU-CVE-2021-42612 |
| Ubuntu:26.04:LTS | halibut | no fix listed | UBUNTU-CVE-2021-42612 |
| Ubuntu:26.10 | halibut | no fix listed | UBUNTU-CVE-2021-42612 |
Affected products (as reported)
References
- https://carteryagemann.com/halibut-case-study.html#poc-halibut-text-uaf x_refsource_MISC
- FEDORA-2022-9a9abd295b vendor-advisory, x_refsource_FEDORA