isakmpd in OpenBSD 3.4 and earlier allows remote attackers to cause a denial of service via an ISAKMP packet with a malformed Cert Request…

Description

isakmpd in OpenBSD 3.4 and earlier allows remote attackers to cause a denial of service via an ISAKMP packet with a malformed Cert Request payload, which causes an integer underflow that is used in a malloc operation that is not properly handled, as demonstrated by the Striker ISAKMP Protocol Test Suite.

Scores

EPSS (exploitation in 30 days)

4.6% · top 8.3% of all CVEs (5 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 10.0.

Weakness

• n/a
• CWE-119 (opens in a new tab)All about CWE-119 and its CVEs

Affected products

• n/a

  • affected n/a

References (7)

• 1009468 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• 9907 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• 20040317 015: RELIABILITY FIX: March 17, 2004 (opens in a new tab)vendor-advisoryx_refsource_OPENBSDx_transferred
• 20040323 R7-0018: OpenBSD isakmpd payload handling denial-of-service vulnerabilities (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• VU#223273 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
• openbsd-isakmp-integer-underflow(15629) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
• http://www.rapid7.com/advisories/R7-0018.html (opens in a new tab)x_refsource_MISCx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2004-0220](https://trackcve.app/badge/CVE-2004-0220.svg)](https://trackcve.app/cve/CVE-2004-0220)

Record last updated 8 Aug 2024, 00:10 UTC.