Improper Verification of Cryptographic Signature Affecting opensaml2 package, versions <2.6.0-4+deb9u1
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-DEBIAN9-OPENSAML2-284590
- published16 Nov 2017
- disclosed16 Nov 2017
Introduced: 16 Nov 2017
CVE-2017-16853 (opens in a new tab)How to fix?
Upgrade Debian:9 opensaml2 to version 2.6.0-4+deb9u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream opensaml2 package and not the opensaml2 package as distributed by Debian.
See How to fix? for Debian:9 relevant fixed versions and status.
The DynamicMetadataProvider class in saml/saml2/metadata/impl/DynamicMetadataProvider.cpp in OpenSAML-C in OpenSAML 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 CPPOST-105.
References
- https://bugs.debian.org/881856
- https://www.debian.org/security/2017/dsa-4039
- https://lists.debian.org/debian-lts-announce/2017/11/msg00024.html
- https://security-tracker.debian.org/tracker/CVE-2017-16853
- https://git.shibboleth.net/view/?p=cpp-opensaml.git;a=commit;h=6182b0acf2df670e75423c2ed7afe6950ef11c9d
- https://shibboleth.net/community/advisories/secadv_20171115.txt
- http://www.securityfocus.com/bid/101898
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-16853
- https://git.shibboleth.net/view/?p=cpp-opensaml.git%3Ba=commit%3Bh=6182b0acf2df670e75423c2ed7afe6950ef11c9d