Bug 1510927 (CVE-2016-10089) - CVE-2016-10089 nagios: Privilege escalation due to incomplete fix for CVE-2016-8641
Summary: CVE-2016-10089 nagios: Privilege escalation due to incomplete fix for CVE-201...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2016-10089
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1510928 1510929
Blocks: 1510935
TreeView+ depends on / blocked
 
Reported: 2017-11-08 13:05 UTC by Adam Mariš
Modified: 2021-02-17 01:16 UTC (History)
40 users (show)

Fixed In Version:
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Doc Text:
A vulnerability was found in Nagios 4.2.4, and earlier, which allows local users to gain root privileges via a hard link attack on the Nagios init script file, related to CVE-2016-8641.
Clone Of:
Environment:
Last Closed: 2019-06-08 03:30:47 UTC
Embargoed:

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Description Adam Mariš 2017-11-08 13:05:57 UTC 
Nagios 4.2.4 and earlier allows local users to gain root privileges via a hard link attack on the Nagios init script file, related to CVE-2016-8641.

External References:

http://www.openwall.com/lists/oss-security/2016/12/30/5
Comment 1 Adam Mariš 2017-11-08 13:06:40 UTC 
Created nagios tracking bugs for this issue:

Affects: epel-all [bug 1510929]
Affects: fedora-all [bug 1510928]
Comment 5 Joshua Padman 2017-11-09 23:35:18 UTC 
Statement:

Red Hat Product Security has rated this issue as having Low security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Comment 9 Joshua Padman 2017-11-12 21:43:23 UTC 
Mitigation:

This flaw, and others like it, are mitigated by enabling hardlink and symlink protections. These protections are enabled by default in Red Hat Enterprise Linux 7 and this vulnerability will only be exploitable if disabled.
Ensure the following protections are enabled:
  sysctl -w fs.protected_hardlinks=1
  sysctl -w fs.protected_symlinks=1
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