CVE-2009-3475

Internet2 Shibboleth Service Provider software 1.3.x before 1.3.3 and 2.x before 2.2.1, when using PKIX trust validation, does not properly handle a '\0' character in the subject or subjectAltName fields of a certificate, which allows remote man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.

Published: 2009-09-29 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-3475 is rated Moderate Risk (49.2/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.36%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2009-3475

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.54% 0.36% -0.18%
2 2025-03-29 0.36% 0.54% +0.18%
3 2025-03-17 — 0.36% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-3475

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2009-3475

OS Trackers for CVE-2009-3475

vendor priority summary link
debian not yet assigned CVE-2009-3475 not yet assigned priority: Debian including 3 source packages (opensaml, shibboleth-sp, xmltooling), 15 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 15. https://security-tracker.debian.org/tracker/CVE-2009-3475
ubuntu medium CVE-2009-3475 medium priority: Ubuntu including 3 source packages (opensaml, shibboleth-sp, xmltooling), 30 status rows across 10 suites (dapper, hardy, intrepid, jaunty, karmic, lucid, maverick, natty, oneiric, upstream): DNE 14, ignored 6, released 5, not-affected 4, needs-triage 1. https://ubuntu.com/security/CVE-2009-3475

Affected software / configurations for CVE-2009-3475

Vendor Product Version Raw CPE
internet2 shibboleth-sp 1.3.1 cpe:2.3:a:internet2:shibboleth-sp:1.3.1:*:*:*:*:*:*:*
internet2 shibboleth-sp 1.3.2 cpe:2.3:a:internet2:shibboleth-sp:1.3.2:*:*:*:*:*:*:*
internet2 shibboleth-sp 1.3f cpe:2.3:a:internet2:shibboleth-sp:1.3f:*:*:*:*:*:*:*
internet2 shibboleth-sp 2.0 cpe:2.3:a:internet2:shibboleth-sp:2.0:*:*:*:*:*:*:*
internet2 shibboleth-sp 2.1 cpe:2.3:a:internet2:shibboleth-sp:2.1:*:*:*:*:*:*:*
internet2 shibboleth-sp 2.2 cpe:2.3:a:internet2:shibboleth-sp:2.2:*:*:*:*:*:*:*

References for CVE-2009-3475

cvelogic Threat Intelligence