Bug 1652593 (CVE-2018-17953)

Summary: CVE-2018-17953 pam: pam_access.so doesn't properly handle ip addresses and subnets filtering
Product: [Other] Security Response Reporter: Pedro Sampaio <psampaio>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: abhgupta, bmcclain, dbaker, dblechte, dfediuck, eedri, jokerman, mgoldboi, michal.skrivanek, sbonazzo, sherold, sthangav, tmraz, trankin
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: 2018-12-10 09:22:29 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: 1652594    
Bug Blocks: 1652595    

Description Pedro Sampaio 2018-11-22 12:59:07 UTC 
A flaw was found in Linux-PAM. Improper handle of ip and netmask values permits bypass of access controls by applications that uses pam for authorization/authentication such as sshd.

References:

https://bugzilla.novell.com/show_bug.cgi?id=1115640
Comment 1 Pedro Sampaio 2018-11-22 12:59:32 UTC 
Created pam tracking bugs for this issue:

Affects: fedora-all [bug 1652594]
Comment 2 Tomas Mraz 2018-11-22 14:06:58 UTC 
AFAIK this is SUSE only downstream bug.
Comment 3 Huzaifa S. Sidhpurwala 2018-12-10 09:22:29 UTC 
Based on information posted on the SUSE linux bug, this bug does not affect versions of PAM shipped with Red Hat Enterprise Linux and Fedora.
Comment 4 Huzaifa S. Sidhpurwala 2018-12-10 09:24:01 UTC 
Based on information posted on the SUSE linux bug, this bug does not affect versions of PAM shipped with Red Hat Enterprise Linux and Fedora.