Heap-based buffer overflow in the ldns_rr_new_frm_str_internal function in ldns before 1.6.11 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a Resource Record (RR) with an unknown type containing input that is longer than a specified length.

The Rocky Linux 9.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ ciqsa-2026_1473 advisory.

    This advisory aggregates security fixes for the ldns SRPM in CIQ LTS 9.6. It addresses 4 CVEs:
    CVE-2020-19860, CVE-2014-3209, CVE-2026-10846, CVE-2011-3581.

Tenable has extracted the preceding description block directly from the CIQ security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Rocky Linux 9.2 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ ciqsa-2026_1477 advisory.

    This advisory aggregates security fixes for the ldns SRPM in CIQ LTS 9.2. It addresses 4 CVEs:
    CVE-2020-19860, CVE-2014-3209, CVE-2026-10846, CVE-2011-3581.

Tenable has extracted the preceding description block directly from the CIQ security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

A boundary error in ldns_rr_new_frm_str_internal() could lead to a heap-based buffer overfow when processing RR records (CVE-2011-3581).

The remote host is affected by the vulnerability described in GLSA-201401-25 (ldns: Arbitrary code execution)

    ldns contains a heap-based buffer overflow in the       ldns_rr_new_frm_str_internal function.
  Impact :

    A remote attacker could execute arbitrary code or cause a Denial of       Service condition with a crafted Resource Record.
  Workaround :

    There is no known workaround at this time.

David Wheeler discovered a buffer overflow in ldns's code to parse RR records, which could lead to the execution of arbitrary code.

Fix for CVE-2011-3581, and other DNSSEC related fixes.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Type	Severity
356495	Rocky Linux 9.6 [CIQ] Security Update: ldns / ldns-debuginfo / ldns-debugsource / ldns-devel / ldns-doc / etc Multiple Vulnerabilities (ciqsa-2026_1473)	Nessus	Rocky Linux Local Security Checks	Local	high
355508	Rocky Linux 9.2 [CIQ] Security Update: ldns / ldns-debuginfo / ldns-debugsource / ldns-devel / ldns-doc / etc Multiple Vulnerabilities (ciqsa-2026_1477)	Nessus	Rocky Linux Local Security Checks	Local	high
75891	openSUSE Security Update : ldns (openSUSE-SU-2011:1161-1)	Nessus	SuSE Local Security Checks	Local	medium
75570	openSUSE Security Update : ldns (openSUSE-SU-2011:1161-1)	Nessus	SuSE Local Security Checks	Local	medium
72080	GLSA-201401-25 : ldns: Arbitrary code execution	Nessus	Gentoo Local Security Checks	Local	medium
56929	Debian DSA-2353-1 : ldns - buffer overflow	Nessus	Debian Local Security Checks	Local	medium
56542	Fedora 15 : ldns-1.6.11-2.fc15 (2011-13929)	Nessus	Fedora Local Security Checks	Local	medium
56541	Fedora 14 : ldns-1.6.11-2.fc14 (2011-13915)	Nessus	Fedora Local Security Checks	Local	medium
56520	Fedora 16 : ldns-1.6.11-2.fc16 (2011-13895)	Nessus	Fedora Local Security Checks	Local	medium

Detections

Analytics

CVE-2011-3581

critical

Tenable Plugins

high

high

medium

medium

medium

medium

medium

medium

medium