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CVE-2009-1755

5.0 · MEDIUM

Off-by-one error in the packet_read_query_section function in packet.c in nsd 3.2.1, and process_query_section in query.c in nsd 2.3.7, allows remote attackers to cause a denial of service (crash)…

Published May 22, 2009nlnetlabsCWE-189EPSS 3.16%

Overview

CVE-2009-1755 is a medium-severity vulnerability affecting nlnetlabs nsd. It was published on May 22, 2009 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Off-by-one error in the packet_read_query_section function in packet.c in nsd 3.2.1, and process_query_section in query.c in nsd 2.3.7, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unspecified vectors that trigger a buffer overflow.

Remediation

Check the references section for vendor advisories and patches from nlnetlabs. Update nsd 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

Refbugs.debian.org/cgi-bin/bugreport.cgi?bug=529418Refbugs.debian.org/cgi-bin/bugreport.cgi?bug=529420Refwww.nlnetlabs.nl/publications/NSD_vulnerability_announcement.htmlRefwww.openwall.com/lists/oss-security/2009/05/19/1Refbugs.debian.org/cgi-bin/bugreport.cgi?bug=529418Refbugs.debian.org/cgi-bin/bugreport.cgi?bug=529420Refwww.nlnetlabs.nl/publications/NSD_vulnerability_announcement.htmlRefwww.openwall.com/lists/oss-security/2009/05/19/1

How CyberStrike helps

Frequently asked questions

What is CVE-2009-1755?

CVE-2009-1755 is a medium-severity vulnerability affecting nlnetlabs nsd. It was published on May 22, 2009 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2009-1755?

This vulnerability has a CVSS 2.0 base score of 5.0, 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-2009-1755?

Check the references section for vendor advisories and patches from nlnetlabs. Update nsd 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-2009-1755?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-1755 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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