Bug 680799

Summary: logrotate: Improper administration of log files located in world-writable directories
Product: [Other] Security Response Reporter: Jan Lieskovsky <jlieskov>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: jkaluza, petr.uzel, tsmetana
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-03-11 06:37:34 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description Flags
Adds "su" option none

Description Jan Lieskovsky 2011-02-27 19:47:34 UTC
A security flaw was found in the way the logrotate utility
performed administration of log files, located in group / world
writable directories. A local attacker could use this flaw
to disclose sensitive information, execute arbitrary code
or cause a denial of service, via unintended / unprivileged
later modifications of log file directory in question.

Different vulnerability than:
[1] https://bugzilla.redhat.com/show_bug.cgi?id=680787 ,
[2] https://bugzilla.redhat.com/show_bug.cgi?id=680789 ,
[3] https://bugzilla.redhat.com/show_bug.cgi?id=680790 ,
[4] https://bugzilla.redhat.com/show_bug.cgi?id=680792 ,
[5] https://bugzilla.redhat.com/show_bug.cgi?id=680795 ,
[6] https://bugzilla.redhat.com/show_bug.cgi?id=680796 ,
[7] https://bugzilla.redhat.com/show_bug.cgi?id=680797 , and
[8] https://bugzilla.redhat.com/show_bug.cgi?id=680798 .

Comment 2 Jan Kalu┼ża 2011-03-10 09:47:51 UTC
Created attachment 483400 [details]
Adds "su" option

This patch adds "su" option variable which can be used to tell logrotate to switch EUID/EGID to specified user/group for rotation of particular log set. We can't use setfsuid/setfsgid because it's Linux specific and logrotate should run also on different posix systems.

With this patch, logrotate does not rotate logs in unsafe directories (world-writable directories or group-writable directories where group is not "root"). It shows error message and skip rotation of log files in unsafe directory.