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.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Service_provider | Shibboleth | 3.0.0 (including) | 3.2.2 (excluding) |
| Shibboleth-sp | Ubuntu | esm-apps/focal | * |
| Shibboleth-sp | Ubuntu | focal | * |
| Shibboleth-sp | Ubuntu | groovy | * |
| Shibboleth-sp | Ubuntu | hirsute | * |
| Shibboleth-sp | Ubuntu | trusty | * |
| Shibboleth-sp | Ubuntu | upstream | * |
Potential 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