Improper Verification of Cryptographic Signature Affecting shibboleth-sp2 package, versions <2.6.0+dfsg1-4+deb9u1build0.17.04.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1704-SHIBBOLETHSP2-317692
- published16 Nov 2017
- disclosed16 Nov 2017
Introduced: 16 Nov 2017
CVE-2017-16852 (opens in a new tab)How to fix?
Upgrade Ubuntu:17.04 shibboleth-sp2 to version 2.6.0+dfsg1-4+deb9u1build0.17.04.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream shibboleth-sp2 package and not the shibboleth-sp2 package as distributed by Ubuntu.
See How to fix? for Ubuntu:17.04 relevant fixed versions and status.
shibsp/metadata/DynamicMetadataProvider.cpp in the Dynamic MetadataProvider plugin in Shibboleth Service Provider before 2.6.1 fails to properly configure itself with the MetadataFilter plugins and does not perform critical security checks such as signature verification, enforcement of validity periods, and other checks specific to deployments, aka SSPCPP-763.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-16852
- https://bugs.debian.org/881857
- https://www.debian.org/security/2017/dsa-4038
- https://lists.debian.org/debian-lts-announce/2017/11/msg00025.html
- https://security-tracker.debian.org/tracker/CVE-2017-16852
- https://git.shibboleth.net/view/?p=cpp-sp.git;a=commit;h=b66cceb0e992c351ad5e2c665229ede82f261b16
- https://shibboleth.net/community/advisories/secadv_20171115.txt
- https://git.shibboleth.net/view/?p=cpp-sp.git%3Ba=commit%3Bh=b66cceb0e992c351ad5e2c665229ede82f261b16