CVE-2021-3402

An integer overflow and several buffer overflow reads in libyara/modul ...

Published 14 May 2021Modified 17 Jun 2026CWE 190

In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Ubuntu (medium).

Description

An integer overflow and several buffer overflow reads in libyara/modules/macho/macho.c in YARA v4.0.3 and earlier could allow an attacker to either cause denial of service or information disclosure via a malicious Mach-O file. Affects all versions before libyara 4.0.4

Affected packages and fixed versions

Source	Package	Fixed in
debian 10	yara	no fix listed
debian 11	yara	4.0.4-1
debian 12	yara	4.0.4-1
debian 13	yara	4.0.4-1
debian 14	yara	4.0.4-1
debian 9	yara	no fix listed
echo	yara	4.0.4-1
ubuntu 20.04-ESM	yara	3.9.0-1ubuntu0.1~esm1

References

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Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.