CVE-2021-42613
CVE-2021-42613 is a high-severity vulnerability in Halibut Project Halibut with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-415.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- CVSS v2: 6.8
- EPSS exploit prediction: 1% (53rd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-415
- Affected product: Halibut Project Halibut
- Published:
- Last modified:
Description
A double free in cleanup_index in index.c in Halibut 1.2 allows an attacker to cause a denial of service or possibly have other unspecified impact via a crafted text document.
Frequently asked questions
- What is CVE-2021-42613?
- A double free in cleanup_index in index.c in Halibut 1.2 allows an attacker to cause a denial of service or possibly have other unspecified impact via a crafted text document.
- How severe is CVE-2021-42613?
- CVE-2021-42613 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-42613 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-42613?
- CVE-2021-42613 primarily affects Halibut Project Halibut. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2021-42613?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2021-42613 published?
- CVE-2021-42613 was published on 2022-05-24 and last updated on 2026-06-17.
References
- https://carteryagemann.com/halibut-case-study.html#poc-halibut-winhelp-df
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CC7UZ7NRXDA7YSCSGWE2CBQM7OZS3K2R/
Affected products (2)
- cpe:2.3:a:halibut_project:halibut:1.2:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
More vulnerabilities in Halibut Project Halibut
- CVE-2021-42614 — High (CVSS 7.8): A use after free in info_width_internal in bk_info.c in Halibut 1.2 allows an attacker to cause a segmentation fault or…
- CVE-2021-42612 — High (CVSS 7.8): A use after free in cleanup_index in index.c in Halibut 1.2 allows an attacker to cause a segmentation fault or…
All CVEs affecting Halibut Project Halibut →
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