CVE-2017-16853

Debian Security Advisory 4039-1

Severity Score

8.1

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

La clase DynamicMetadataProvider en saml/saml2/metadata/impl/DynamicMetadataProvider.cpp en OpenSAML-C en OpenSAML, en versiones anteriores a la 2.6.1, no se configura correctamente con los plugins MetadataFilter y no realiza las verificaciones de seguridad críticas como la verificación de firmas, cumplimiento de los periodos de validez y otras comprobaciones específicas de despliegues. Esta vulnerabilidad también se conoce como CPPOST-105.

Rod Widdowson of Steading System Software LLP discovered a coding error in the OpenSAML library, causing the DynamicMetadataProvider class to fail configuring itself with the filters provided and omitting whatever checks they are intended to perform.

*Credits: N/A

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-11-16 CVE Reserved
2017-11-16 CVE Published
2024-08-05 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-347: Improper Verification of Cryptographic Signature

CAPEC

References (6)

URL	Tag	Source
http://www.securityfocus.com/bid/101898	Third Party Advisory
https://bugs.debian.org/881856	Issue Tracking
https://git.shibboleth.net/view/?p=cpp-opensaml.git%3Ba=commit%3Bh=6182b0acf2df670e75423c2ed7afe6950ef11c9d	X_refsource_confirm
https://lists.debian.org/debian-lts-announce/2017/11/msg00024.html	Mailing List

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://shibboleth.net/community/advisories/secadv_20171115.txt	2023-11-07
https://www.debian.org/security/2017/dsa-4039	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Shibboleth Search vendor "Shibboleth"		Opensaml Search vendor "Shibboleth" for product "Opensaml"				< 2.6.1 Search vendor "Shibboleth" for product "Opensaml" and version " < 2.6.1"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected