CVE-2009-2661The asn1_length function in strongSwan 2.8 before 2.8.11, 4.2 before 4.2.17, and 4.3 before 4.3.3 does not properly handle X.509…
- 5.0MediumCVSS base score
- 1.6%Exploitation in 30 daysEPSS · top 24% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The asn1_length function in strongSwan 2.8 before 2.8.11, 4.2 before 4.2.17, and 4.3 before 4.3.3 does not properly handle X.509 certificates with crafted Relative Distinguished Names (RDNs), which allows remote attackers to cause a denial of service (pluto IKE daemon crash) via malformed ASN.1 data. NOTE: this is due to an incomplete fix for CVE-2009-2185.
Timeline
ID reserved
By mitre
Published
- 15 years later
· 15 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
- EPSS (exploitation in 30 days)
- 1.6% · top 24% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.
Affected products
n/a
- affected n/a
References
References10
- [oss-security] 20090727 CVE id request: strongswan (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- http://download.strongswan.org/patches/07_asn1_length_patch/strongswan-4.x.x_asn1_length.patch (opens in a new tab)x_refsource_CONFIRMx_transferred
- SUSE-SR:2009:018 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- 36922 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- DSA-1899 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- ADV-2009-2247 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- http://up2date.astaro.com/2009/08/up2date_7505_released.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- SUSE-SR:2009:016 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- http://download.strongswan.org/patches/07_asn1_length_patch/strongswan-4.3.x_asn1_length.patch (opens in a new tab)x_refsource_CONFIRMx_transferred
- [Announce] 20090723 ANNOUNCE: strongswan-2.8.11 and strongswan-4.2.17 released (opens in a new tab)mailing-listx_refsource_MLISTx_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)
- EUVD EUVD-2009-2654 (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
[](https://cveledger.app/cve/CVE-2009-2661)Record last updated .