What’s Vulnerable › Vulnerabilities

CVE-2021-31826

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-27 · updated 2026-06-17
• Weakness: CWE-476

Description

Shibboleth Service Provider 3.x before 3.2.2 is prone to a NULL pointer dereference flaw involving the session recovery feature. The flaw is exploitable (for a daemon crash) on systems not using this feature if a crafted cookie is supplied.

Affected products

• Shibboleth Service Provider: from 3.0.0 before 3.2.2 — fixed in 3.2.2

How to fix

Upgrade to a fixed version: Shibboleth Service Provider 3.2.2. Check the vendor advisory for mitigations.

References

• https://bugs.debian.org/987608
• https://git.shibboleth.net/view/?p=cpp-sp.git%3Ba=commit%3Bh=5a47c3b9378f4c49392dd4d15189b70956f9f2ec
• https://issues.shibboleth.net/jira/browse/SSPCPP-927
• https://shibboleth.net/community/advisories/secadv_20210426.txt
• https://www.debian.org/security/2021/dsa-4905
• https://bugs.debian.org/987608
• https://git.shibboleth.net/view/?p=cpp-sp.git%3Ba=commit%3Bh=5a47c3b9378f4c49392dd4d15189b70956f9f2ec
• https://issues.shibboleth.net/jira/browse/SSPCPP-927
• https://shibboleth.net/community/advisories/secadv_20210426.txt
• https://www.debian.org/security/2021/dsa-4905

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