Bug 1651869 (CVE-2018-19046)

Summary: CVE-2018-19046 keepalived: Insecure use of temporary files allows attackers read sensitive information from pre-existing files
Product: [Other] Security Response Reporter: Sam Fowler <sfowler>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: apevec, athmanem, bperkins, chrisw, cluster-maint, markmc, matthias, rbryant, rohara, tdecacqu
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: keepalived 2.0.10 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-06-10 10:42:52 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: 1651870, 1652398    
Bug Blocks: 1651865    

Description Sam Fowler 2018-11-21 05:42:30 UTC 
keepalived before version 2.0.10 didn't check for existing plain files when writing data to a temporary file upon a call to PrintData or PrintStats. If a local attacker had previously created a file with the expected name (e.g., /tmp/keepalived.data or /tmp/keepalived.stats), with read access for the attacker and write access for the keepalived process, then this potentially leaked sensitive information.


Upstream Issue:

https://github.com/acassen/keepalived/issues/1048


Reference:

https://bugzilla.suse.com/show_bug.cgi?id=1015141
Comment 1 Sam Fowler 2018-11-21 05:43:00 UTC 
Created keepalived tracking bugs for this issue:

Affects: fedora-all [bug 1651870]
Comment 4 Adam Mariš 2018-11-22 15:32:40 UTC 
Upstream fixes:

https://github.com/acassen/keepalived/commit/ac8e2ef053de273ce7a0cf0cb611e599dca4b298
https://github.com/acassen/keepalived/commit/26c8d6374db33bcfcdcd758b1282f12ceef4b94f
https://github.com/acassen/keepalived/commit/17f944144b3d9c5131569b1cc988cc90fd676671
Comment 5 Adam Mariš 2018-11-29 14:23:11 UTC 
Statement:

This issue did not affect the versions of keepalived as shipped with Red Hat Enterprise Linux 6 and 7 as the packages are not built with dbus support, therefore the vulnerable code is not available in resulting RPM and the issue cannot be exploited.