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CVE-2009-3475

21
FAUCET Score

CVE-2009-3475 describes a critical vulnerability in Internet2 Shibboleth Service Provider software versions 1.3.x before 1.3.3 and 2.x before 2.2.1. When using PKIX trust validation, the software fails to properly handle null characters in certificate subject or subjectAltName fields, enabling remote man-in-the-middle attackers to spoof SSL servers using specially crafted certificates from legitimate Certificate Authorities. This vulnerability carries a CVSS score of 7.5, indicating a high severity with low attack complexity and potential for partial compromise of confidentiality, integrity, and availability. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage for this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.3.1CPE matchmatch criteria
cpe:2.3:a:internet2:shibboleth-sp:1.3.1:*:*:*:*:*:*:*
1.3.2CPE matchmatch criteria
cpe:2.3:a:internet2:shibboleth-sp:1.3.2:*:*:*:*:*:*:*
1.3fCPE matchmatch criteria
cpe:2.3:a:internet2:shibboleth-sp:1.3f:*:*:*:*:*:*:*
2.0CPE matchmatch criteria
cpe:2.3:a:internet2:shibboleth-sp:2.0:*:*:*:*:*:*:*
2.1CPE matchmatch criteria
cpe:2.3:a:internet2:shibboleth-sp:2.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.89%
Probability of exploitation in next 30 days
EPSS Percentile
55.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0089 is in the 30th percentile among its peer group of 51,466 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

secunia.com / advisories/36855
Vendor Advisory
secunia.com / advisories/36861
Vendor Advisory
secunia.com / advisories/36876
Vendor Advisory
shibboleth.internet2.edu / secadv/secadv_20090817.txt
Vendor Advisory
debian.org / security/2009/dsa-1895
debian.org / security/2009/dsa-1896