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Bug 1510927 - (CVE-2016-10089) CVE-2016-10089 nagios: Privilege escalation due to incomplete fix for CVE-2016-8641
CVE-2016-10089 nagios: Privilege escalation due to incomplete fix for CVE-201...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20161230,reported=2...
: Security
Depends On: 1510928 1510929
Blocks: 1510935
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Reported: 2017-11-08 08:05 EST by Adam Mariš
Modified: 2018-02-12 04:03 EST (History)
42 users (show)

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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.
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Description Adam Mariš 2017-11-08 08:05:57 EST 
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 08:06:40 EST 
Created nagios tracking bugs for this issue:

Affects: epel-all [bug 1510929]
Affects: fedora-all [bug 1510928]
Comment 5 Joshua Padman 2017-11-09 18:35:18 EST 
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 16:43:23 EST 
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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