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CVE-2005-0039

6.4 · MEDIUM

Certain configurations of IPsec, when using Encapsulating Security Payload (ESP) in tunnel mode, integrity protection at a higher layer, or Authentication Header (AH), allow remote attackers to dec…

Published May 10, 2005nisscEPSS 4.08%

Overview

CVE-2005-0039 is a medium-severity vulnerability affecting nissc ipsec. It was published on May 10, 2005 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

Certain configurations of IPsec, when using Encapsulating Security Payload (ESP) in tunnel mode, integrity protection at a higher layer, or Authentication Header (AH), allow remote attackers to decrypt IPSec communications by modifying the outer packet in ways that cause plaintext data from the inner packet to be returned in ICMP messages, as demonstrated using bit-flipping attacks and (1) Destination Address Rewriting, (2) a modified header length that causes portions of the packet to be interpreted as IP Options, or (3) a modified protocol field and source address.

Remediation

Check the references section for vendor advisories and patches from nissc. Update ipsec 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

Refmarc.info/?l=bugtraq&m=111566201610350&w=2Refsecunia.com/advisories/17938Refsecuritytracker.com/id?1015320Refwww.kb.cert.org/vuls/id/302220Refwww.niscc.gov.uk/niscc/docs/al-20050509-00386.html?lang=enRefwww.securityfocus.com/archive/1/407774Refwww.securityfocus.com/bid/13562Refwww.vupen.com/english/advisories/2005/0507Refwww.vupen.com/english/advisories/2005/2806Refmarc.info/?l=bugtraq&m=111566201610350&w=2

How CyberStrike helps

Frequently asked questions

What is CVE-2005-0039?

CVE-2005-0039 is a medium-severity vulnerability affecting nissc ipsec. It was published on May 10, 2005 and has a CVSS 2.0 base score of 6.4 (MEDIUM).

How severe is CVE-2005-0039?

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-2005-0039?

Check the references section for vendor advisories and patches from nissc. Update ipsec 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-2005-0039?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2005-0039 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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