CVE-2017-16853

Name: CVE-2017-16853
Creator: NVD / NIST
Published: 2017-11-16T17:29:00.497+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.40%

Last modified Jun 17, 2026

CVE-2017-16853 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 1.40% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

1.40%

69.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-347

Affected Software

Vendor	Product	Versions
Shibboleth	Opensaml	< 2.6.1
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0

References

http://www.securityfocus.com/bid/101898Third Party Advisory, VDB Entry
https://bugs.debian.org/881856Issue Tracking, Third Party Advisory
https://git.shibboleth.net/view/?p=cpp-opensaml.git%3Ba=commit%3Bh=6182b0acf2df670e75423c2ed7afe6950ef11c9d
https://lists.debian.org/debian-lts-announce/2017/11/msg00024.html
https://shibboleth.net/community/advisories/secadv_20171115.txtIssue Tracking, Vendor Advisory
https://www.debian.org/security/2017/dsa-4039Issue Tracking, Third Party Advisory
http://www.securityfocus.com/bid/101898Third Party Advisory, VDB Entry
https://bugs.debian.org/881856Issue Tracking, Third Party Advisory
https://git.shibboleth.net/view/?p=cpp-opensaml.git%3Ba=commit%3Bh=6182b0acf2df670e75423c2ed7afe6950ef11c9d
https://lists.debian.org/debian-lts-announce/2017/11/msg00024.html
https://shibboleth.net/community/advisories/secadv_20171115.txtIssue Tracking, Vendor Advisory
https://www.debian.org/security/2017/dsa-4039Issue Tracking, Third Party Advisory

Timeline

Published: Nov 16, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-16853?

How severe is CVE-2017-16853?

Severity scoring for CVE-2017-16853 is pending analysis. The EPSS model estimates a 1.40% probability of exploitation in the next 30 days.

How do I fix CVE-2017-16853?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-16853?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST