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Vulnerability record · CVE-2011-3581 · published 4 November 2011

CVE-2011-3581: Nlnetlabs ldns memory buffer overflow vulnerability

Nlnetlabs · Ldns

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.

6.8 CVSS 2.0 Medium EPSS 4.1% · top 9.6% CWE-119 · Memory buffer overflow
6.8CVSS 2.0 base score
4.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
22References
16 Jun 2026Last modified by NVD

Description

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.

AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.fedoraproject.org/pipermail/package-announce/2011-October/068091.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-October/068201.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-October/068239.html
http://lists.opensuse.org/opensuse-security-announce/2011-10/msg00008.html
http://nlnetlabs.nl/svn/ldns/tags/release-1.6.11/Changelog
http://seclists.org/oss-sec/2011/q3/503
http://seclists.org/oss-sec/2011/q3/542
http://secunia.com/advisories/46470 Vendor Advisory
http://secunia.com/advisories/46476 Vendor Advisory
http://www.nlnetlabs.nl/bugs-script/show_bug.cgi?id=403
http://www.securityfocus.com/bid/49748
http://lists.fedoraproject.org/pipermail/package-announce/2011-October/068091.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-October/068201.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-October/068239.html
http://lists.opensuse.org/opensuse-security-announce/2011-10/msg00008.html
http://nlnetlabs.nl/svn/ldns/tags/release-1.6.11/Changelog
http://seclists.org/oss-sec/2011/q3/503
http://seclists.org/oss-sec/2011/q3/542
http://secunia.com/advisories/46470 Vendor Advisory
http://secunia.com/advisories/46476 Vendor Advisory
http://www.nlnetlabs.nl/bugs-script/show_bug.cgi?id=403
http://www.securityfocus.com/bid/49748

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2011-3581), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.