CVE-2005-3670: Multiple unspecified vulnerabilities in the Internet Key Exchange version 1 (IKEv1) implementation in HP HP-UX

This week

HIGH 7.8MITIGATEMITIGATEMITIGATE

CVE-2005-3670 is a high-severity flaw (CVSS 7.8) affecting jetdirect 635n, hp-ux, tru64. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple unspecified vulnerabilities in the Internet Key Exchange version 1 (IKEv1) implementation in HP HP-UX B.11.00, B.11.11, and B.11.23 running IPSec, HP Jetdirect 635n IPv6/IPsec Print Server, and HP Tru64 UNIX 5.1B-3 and 5.1B-2/PK4, allow remote attackers to cause a denial of service via certain IKE packets, as demonstrated by the PROTOS ISAKMP Test Suite for IKEv1. NOTE: due to the lack of details in the HP advisory, it is unclear which

Why this priority

High severity
EPSS top 5%: very likely to be exploited
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
EPSS exploit chance	9.1% (top 5%)
CISA exploited list	No
Published	2005-11-18
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: hp

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2005-11-18 21:03 UTCPublished CVE record published
2026-06-16 22:17 UTCUpdated Record last modified

hp jetdirect 635n MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Firmware

Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.

hp hp-ux MITIGATE

Affected: 11.00 · 11.11 · 11.23

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.00

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

hp tru64 MITIGATE

Affected: 5.1b1 pk4 · 5.1b3

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.1b1

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2005-3670?

jetdirect 635n: mitigate or apply the listed mitigation; hp-ux: mitigate or apply the listed mitigation; tru64: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2005-3670 being exploited?

CVE-2005-3670 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2005-3670 affect?

CVE-2005-3670 affects jetdirect 635n, hp-ux, tru64. Severity is high (CVSS 7.8). Multiple unspecified vulnerabilities in the Internet Key Exchange version 1 (IKEv1) implementation in HP HP-UX B.11.00, B.11.11, and B.11.23 running IPSec, HP Jetdirect 635n IPv6/IPsec Print Server, and HP Tru64 UNIX 5.1B-3 and 5.1B-2/PK4,

How urgent is CVE-2005-3670?

Priority 56/100. High severity; EPSS top 5%: very likely to be exploited; Public exploit reference

References

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