CVE-2007-1841: The isakmp_info_recv function in src/racoon/isakmp_inf.c in racoon in Ipsec-tools before 0.6.7 allows remote a

Q: How do I fix CVE-2007-1841?

ipsec-tools: upgrade to newer than 0.6.2. Exact commands for each OS are on this page.

Q: Is CVE-2007-1841 being exploited?

CVE-2007-1841 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2007-1841 affect?

CVE-2007-1841 affects ipsec-tools. Severity is medium (CVSS 4.3). The isakmp_info_recv function in src/racoon/isakmp_inf.c in racoon in Ipsec-tools before 0.6.7 allows remote attackers to cause a denial of service (tunnel crash) via crafted (1) DELETE (ISAKMP_NPTYPE_D) and (2) NOTIFY (ISAKMP_NPTYPE_N) mes

Q: How urgent is CVE-2007-1841?

Priority 37/100. No elevated risk signals yet.

Routine

MEDIUM 4.3UPGRADE

CVE-2007-1841 is a medium-severity flaw (CVSS 4.3) affecting ipsec-tools. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The isakmp_info_recv function in src/racoon/isakmp_inf.c in racoon in Ipsec-tools before 0.6.7 allows remote attackers to cause a denial of service (tunnel crash) via crafted (1) DELETE (ISAKMP_NPTYPE_D) and (2) NOTIFY (ISAKMP_NPTYPE_N) messages.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	2.9% (top 13%)
CISA exploited list	No
Published	2007-04-10
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: ipsec-tools

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

Am I affected?

Timeline

2007-04-10 22:19 UTCPublished CVE record published
2026-06-16 22:38 UTCUpdated Record last modified

ipsec-tools ipsec-tools UPGRADE

Affected: <= 0.6.2

Fixed in: newer than 0.6.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ipsec-tools || rpm -q ipsec-tools || ipsec-tools --version

2. UPGRADE to newer than 0.6.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ipsec-tools

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ipsec-tools

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2007-1841?

ipsec-tools: upgrade to newer than 0.6.2. Exact commands for each OS are on this page.

Is CVE-2007-1841 being exploited?

CVE-2007-1841 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-2007-1841 affect?

CVE-2007-1841 affects ipsec-tools. Severity is medium (CVSS 4.3). The isakmp_info_recv function in src/racoon/isakmp_inf.c in racoon in Ipsec-tools before 0.6.7 allows remote attackers to cause a denial of service (tunnel crash) via crafted (1) DELETE (ISAKMP_NPTYPE_D) and (2) NOTIFY (ISAKMP_NPTYPE_N) mes

How urgent is CVE-2007-1841?

Priority 37/100. No elevated risk signals yet.

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References

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