CVE-2018-7644: The XmlSecLibs library as used in the saml2 library in SimpleSAMLphp before 1.15.3 incorrectly verifies signatures on SAML assertions, allowing a remote…

PriorityP339high7.5CVSS 3.0

AVNACLPRNUINSUCNIHAN

EPSS

1.26%

66.2th percentile

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.

Affected

7 ranges

Vendor	Product	Version range	Fixed in
debian	simplesamlphp	< simplesamlphp 1.15.3-1 (bookworm)	simplesamlphp 1.15.3-1 (bookworm)
simplesamlphp	saml2	>= 0 < 1.10.5	1.10.5
simplesamlphp	saml2	>= 2.0 < 2.3.7	2.3.7
simplesamlphp	saml2	>= 3.0 < 3.1.3	3.1.3
simplesamlphp	simplesamlphp	< 1.15.3	1.15.3
simplesamlphp	simplesamlphp	>= 0 < 1.15.3-1	1.15.3-1
simplesamlphp	simplesamlphp	>= 0 < 1.15.3-1	1.15.3-1

CVSS provenance

nvdv3.07.5HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:P/A:N

osv7.5HIGH

vendor_debian7.5HIGH

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