Vulnerability record · CVE-2009-1086 · published 25 March 2009

CVE-2009-1086: Nlnetlabs ldns vulnerability

Nlnetlabs · Ldns

Heap-based buffer overflow in the ldns_rr_new_frm_str_internal function in ldns 1.4.x allows remote attackers to cause a denial of service (memory corruption) and possibly execute arbitrary code via a DNS resource record (RR) with a long (1) class field (clas variable) and possibly (2) TTL field.

6.4 CVSS 2.0 Medium EPSS 3.5% · top 11.3% CWE-399 · CWE-399

6.4CVSS 2.0 base score

3.5%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

16References

16 Jun 2026Last modified by NVD

Description

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

Affected products

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

Ldns Nlnetlabs

References

Link	Tags
http://lists.opensuse.org/opensuse-security-announce/2009-05/msg00000.html
http://secunia.com/advisories/35013
http://secunia.com/advisories/35065
http://www.debian.org/security/2009/dsa-1795
http://www.nlnetlabs.nl/bugs/show_bug.cgi?id=232
http://www.nlnetlabs.nl/svn/ldns/tags/release-1.5.0/Changelog
http://www.openwall.com/lists/oss-security/2009/03/24/4
http://www.securityfocus.com/bid/34233
http://lists.opensuse.org/opensuse-security-announce/2009-05/msg00000.html
http://secunia.com/advisories/35013
http://secunia.com/advisories/35065
http://www.debian.org/security/2009/dsa-1795
http://www.nlnetlabs.nl/bugs/show_bug.cgi?id=232
http://www.nlnetlabs.nl/svn/ldns/tags/release-1.5.0/Changelog
http://www.openwall.com/lists/oss-security/2009/03/24/4
http://www.securityfocus.com/bid/34233

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Related vulnerabilities

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

9.8CVE-2017-1000231Nlnetlabs ldns double free vulnerabilityA double-free vulnerability in parse.c in ldns 1.7.0 have unspecified impact and attack vectors.EPSS 2.7%17 Nov 2017 9.8CVE-2017-1000232Nlnetlabs ldns double free vulnerabilityA double-free vulnerability in str2host.c in ldns 1.7.0 have unspecified impact and attack vectors.EPSS 2.3%17 Nov 2017 8.2CVE-2026-10846Nlnetlabs ldns origin validation error vulnerabilityNLnet Labs ldns 1.2.0 up to and including versions 1.9.0, when used in applications as (stub) resolver over UDP, lacks matching the query destination…EPSS 0.15%10 Jun 2026 7.5CVE-2020-19861Nlnetlabs ldns out-of-bounds read vulnerabilityWhen a zone file in ldns 1.7.1 is parsed, the function ldns_nsec3_salt_data is too trusted for the length value obtained from the zone file. When the…EPSS 1.5%21 Jan 2022 6.8CVE-2011-3581Nlnetlabs ldns memory buffer overflow vulnerabilityHeap-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 (c…EPSS 4.1%4 Nov 2011 6.5CVE-2020-19860Nlnetlabs ldns out-of-bounds read vulnerabilityWhen ldns version 1.7.1 verifies a zone file, the ldns_rr_new_frm_str_internal function has a heap out of bounds read vulnerability. An attacker can …EPSS 1.3%21 Jan 2022 2.1CVE-2014-3209Nlnetlabs ldns permissions and access controls vulnerabilityThe ldns-keygen tool in ldns 1.6.x uses the current umask to set the privileges of the private key, which might allow local users to obtain the priva…EPSS 0.38%16 Nov 2014 8.8CVE-2010-0806Microsoft Internet Explorer Peer Objects use-after-free allows remote code executionInternet Explorer 6, 6 SP1 and 7 contain a use-after-free in the Peer Objects component (iepeers.dll), where an object is accessed after deletion, le…KEVEPSS 82%analysed10 Mar 2010

Source: NIST National Vulnerability Database (record CVE-2009-1086), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.