rss-newsfeed.php in Nagios Core 3.4.4, 3.5.1, and earlier, when MAGPIE_CACHE_ON is set to 1, allows local users to overwrite arbitrary files via a symlink attack on /tmp/magpie_cache.
Weakness
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Nagios | Nagios | * | 3.5.1 (including) |
| Nagios | Nagios | 3.4.4 (including) | 3.4.4 (including) |
| Openstack | Redhat | 3.0 (including) | 3.0 (including) |
| OpenStack 3 for RHEL 6 | RedHat | nagios-0:3.5.1-2.el6ost | * |
| Nagios3 | Ubuntu | quantal | * |
| Nagios3 | Ubuntu | raring | * |
| Nagios3 | Ubuntu | saucy | * |
| Nagios3 | Ubuntu | upstream | * |
Potential Mitigations
- Follow the principle of least privilege when assigning access rights to entities in a software system.
- Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/132.html
- https://cwe.mitre.org/data/definitions/17.html
- https://cwe.mitre.org/data/definitions/35.html
- https://cwe.mitre.org/data/definitions/76.html
References
- http://rhn.redhat.com/errata/RHSA-2013-1526.html
- http://www.securityfocus.com/bid/61747
- https://bugzilla.redhat.com/show_bug.cgi?id=958002
- https://www.nagios.org/projects/nagios-core/history/4x/
- http://rhn.redhat.com/errata/RHSA-2013-1526.html
- http://www.securityfocus.com/bid/61747
- https://bugzilla.redhat.com/show_bug.cgi?id=958002
- https://www.nagios.org/projects/nagios-core/history/4x/