How severe is CVE-2009-3475?

CVE-2009-3475 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2009-3475 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-3475?

CVE-2009-3475 primarily affects Internet2 Shibboleth-sp. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-3475?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2009-3475 published?

CVE-2009-3475 was published on 2009-09-29 and last updated on 2026-06-16.

CVE-2009-3475

CVE-2009-3475 is a high-severity vulnerability in Internet2 Shibboleth-sp with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-310.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-310
Affected product: Internet2 Shibboleth-sp
Published: 2009-09-29
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2009-3475?: CVE-2009-3475 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2009-3475 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-3475?: CVE-2009-3475 primarily affects Internet2 Shibboleth-sp. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-3475?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2009-3475 published?: CVE-2009-3475 was published on 2009-09-29 and last updated on 2026-06-16.

References

Affected products (6)

cpe:2.3:a:internet2:shibboleth-sp:1.3.1:*:*:*:*:*:*:*
cpe:2.3:a:internet2:shibboleth-sp:1.3.2:*:*:*:*:*:*:*
cpe:2.3:a:internet2:shibboleth-sp:1.3f:*:*:*:*:*:*:*
cpe:2.3:a:internet2:shibboleth-sp:2.0:*:*:*:*:*:*:*
cpe:2.3:a:internet2:shibboleth-sp:2.1:*:*:*:*:*:*:*
cpe:2.3:a:internet2:shibboleth-sp:2.2:*:*:*:*:*:*:*

More vulnerabilities in Internet2 Shibboleth-sp

CVE-2009-3476 — Critical (CVSS 9.3): Buffer overflow in OpenSAML before 1.1.3 as used in Internet2 Shibboleth Service Provider software 1.3.x before 1.3.4,…
CVE-2009-3474 — High (CVSS 7.5): OpenSAML 2.x before 2.2.1 and XMLTooling 1.x before 1.2.1, as used by Internet2 Shibboleth Service Provider 2.x before…

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