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CVE-2009-1086

6.4 · MEDIUM

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 vi…

Published Mar 25, 2009nlnetlabsCWE-399EPSS 3.47%

Overview

CVE-2009-1086 is a medium-severity vulnerability affecting nlnetlabs ldns. It was published on March 25, 2009 and has a CVSS 2.0 base score of 6.4 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 6.4, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories and patches from nlnetlabs. Update ldns to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Reflists.opensuse.org/opensuse-security-announce/2009-05/msg00000.htmlRefsecunia.com/advisories/35013Refsecunia.com/advisories/35065Refwww.debian.org/security/2009/dsa-1795Refwww.nlnetlabs.nl/bugs/show_bug.cgi?id=232Refwww.nlnetlabs.nl/svn/ldns/tags/release-1.5.0/ChangelogRefwww.openwall.com/lists/oss-security/2009/03/24/4Refwww.securityfocus.com/bid/34233Reflists.opensuse.org/opensuse-security-announce/2009-05/msg00000.htmlRefsecunia.com/advisories/35013

How CyberStrike helps

Frequently asked questions

What is CVE-2009-1086?

CVE-2009-1086 is a medium-severity vulnerability affecting nlnetlabs ldns. It was published on March 25, 2009 and has a CVSS 2.0 base score of 6.4 (MEDIUM).

How severe is CVE-2009-1086?

This vulnerability has a CVSS 2.0 base score of 6.4, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2009-1086?

Check the references section for vendor advisories and patches from nlnetlabs. Update ldns to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2009-1086?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-1086 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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