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CVE-2018-7644

Published: 5 March 2018

The XmlSecLibs library as used in the saml2 library in SimpleSAMLphp before 1.15.3 incorrectly verifies signatures on SAML assertions, allowing a remote attacker to construct a crafted SAML assertion on behalf of an Identity Provider that would pass as cryptographically valid, thereby allowing them to impersonate a user from that Identity Provider, aka a key confusion issue.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
simplesamlphp
Launchpad, Ubuntu, Debian
artful Ignored
(end of life)
bionic Not vulnerable
(1.15.3-1)
cosmic Ignored
(end of life)
disco Not vulnerable
(1.15.3-1)
eoan Not vulnerable
(1.15.3-1)
focal Not vulnerable
(1.15.3-1)
trusty Does not exist
(trusty was needs-triage)
upstream
Released (1.15.3-1)
groovy Not vulnerable
(1.15.3-1)
xenial Needed

jammy Not vulnerable
(1.15.3-1)
kinetic Not vulnerable
(1.15.3-1)
lunar Not vulnerable
(1.15.3-1)
hirsute Not vulnerable
(1.15.3-1)
impish Not vulnerable
(1.15.3-1)
mantic Not vulnerable
(1.15.3-1)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact High
Availability impact None
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N