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CVE-2008-4551

15
FAUCET Score

CVE-2008-4551 describes a denial-of-service vulnerability affecting strongSwan versions 4.2.6 and earlier. Remote attackers can crash the strongSwan daemon by sending a specially crafted IKE_SA_INIT message containing numerous NULL values in the Key Exchange payload, leading to a NULL pointer dereference. This vulnerability has a CVSS score of 5.0, indicating a medium severity with low attack complexity and no authentication required, resulting in a partial availability impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.2.6CPE matchmatch criteria
cpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
2.0.0CPE matchmatch criteria
cpe:2.3:a:strongswan:strongswan:2.0.0:*:*:*:*:*:*:*
2.0.1CPE matchmatch criteria
cpe:2.3:a:strongswan:strongswan:2.0.1:*:*:*:*:*:*:*
2.0.2CPE matchmatch criteria
cpe:2.3:a:strongswan:strongswan:2.0.2:*:*:*:*:*:*:*
2.1.0CPE matchmatch criteria
cpe:2.3:a:strongswan:strongswan:2.1.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.52%
Probability of exploitation in next 30 days
EPSS Percentile
83.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0252 is in the 75th percentile among its peer group of 23,725 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

download.strongswan.org / CHANGES4.txt
labs.mudynamics.com / advisories/MU-200809-01.txt
secunia.com / advisories/31963
Vendor Advisory
securityfocus.com / bid/31291
securitytracker.com / id
vupen.com / english/advisories/2008/2660