Bug 1564639 (CVE-2018-9275)

Summary:	CVE-2018-9275 pam_yubico: Information disclosure in check_user_token in util.c
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	maxim, nb, oliver
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-11-16 17:22:19 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1564640, 1564641
Bug Blocks:

Description Pedro Sampaio 2018-04-06 18:38:46 UTC

In check_user_token in util.c in the Yubico PAM module (aka pam_yubico) 2.18 through 2.25, successful logins can leak file descriptors to the auth mapping file, which can lead to information disclosure (serial number of a device) and/or DoS (reaching the maximum number of file descriptors).

Upstream Issue:

https://github.com/Yubico/yubico-pam/issues/136

Upstream patch:

https://github.com/Yubico/yubico-pam/commit/0f6ceabab0a8849b47f67d727aa526c2656089ba

Comment 1 Pedro Sampaio 2018-04-06 18:39:15 UTC

Created pam_yubico tracking bugs for this issue:

Affects: fedora-all [bug 1564641]
Affects: epel-all [bug 1564640]

Comment 2 Nick Bebout 2018-07-23 16:02:44 UTC

updates are pending push to testing.