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samlr XML nodes comment attack

High severity GitHub Reviewed Published Jul 31, 2019 to the GitHub Advisory Database • Updated Aug 17, 2023

Package

bundler samlr (RubyGems)

Affected versions

< 2.6.2

Patched versions

2.6.2

Description

Zendesk Samlr before 2.6.2 allows an XML nodes comment attack such as a name_id node with user@example.com followed by <!---->. and then the attacker's domain name.

References

Published by the National Vulnerability Database Jul 26, 2019
Reviewed Jul 31, 2019
Published to the GitHub Advisory Database Jul 31, 2019
Last updated Aug 17, 2023

Severity

High
7.5
/ 10

CVSS base metrics

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

Weaknesses

CVE ID

CVE-2018-20857

GHSA ID

GHSA-qpxp-5j56-gg3x

Source code

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