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CVE-2017-18122

Published: Feb 2, 2018Updated: Nov 21, 2024 Sources: CVE List NVD GHSACWE-347
NVD MITRE
8.1CVSSHIGH
EPSS Score
1.1%
Top 38.1%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

Description

A signature-validation bypass issue was discovered in SimpleSAMLphp through 1.14.16. A SimpleSAMLphp Service Provider using SAML 1.1 will regard as valid any unsigned SAML response containing more than one signed assertion, provided that the signature of at least one of the assertions is valid. Attributes contained in all the assertions received will be merged and the entityID of the first assertion received will be used, allowing an attacker to impersonate any user of any IdP given an assertion signed by the targeted IdP.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-347

Affected Products

simplesamlphpsimplesamlphp
Library
OSS Libraries / generic-library
debian linuxdebian
On-premOS
Operating Systems / linux-distro
n/an/a
simplesamlphp/simplesamlphpPackagistOSS Libraries
simplesamlphposs-projectOSS Librariesaka simplesamlphp, saml2, xml-security
debianoss-projectGBOperating Systemsaka debian gnu/linux
packagistpackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://lists.debian.org/debian-lts-announce/2018/02/msg00008.html
lists.debian.org
https://simplesamlphp.org/security/201710-01
simplesamlphp.org
https://www.debian.org/security/2018/dsa-4127
debian.org
and 4 more references View all →

Timeline

Published
Feb 2, 2018
Last Updated
Nov 21, 2024

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