Check_MK through 1.2.5i2p1 allows local users to read arbitrary files via a symlink attack to a file in /var/lib/check_mk_agent/job.

The version of Check_MK running on the remote web server is 1.2.3i prior to 1.2.5i3. It is, therefore, affected by a flaw due to the /var/lib/check_mk_agent/job directory creating temporary files with insufficiently secure permissions. A local attacker can exploit this issue by creating a symbolic link in the directory so that it points to a file the attacker normally would not have access to (e.g., /etc/shadow). Since the agent expects output from jobs using the mk-job Tool in that directory, it will output the content of all files in the directory on TCP port 6556 by default.

- Install the mk-job binary on /usr/bin.

    - Make sure the proper permissions are given to       /var/lib/check_mk_agent/job to prevent any hard or       symlink to be created by a normal user and pointing to       any file on the filesystem exposing it on the       check-mk-agent output being run as root.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
101088	Check_MK Agent for Linux 1.2.3i < 1.2.5i3 Arbitrary File Disclosure	Nessus	CGI abuses	medium
74389	Fedora 19 : check-mk-1.2.4p2-2.fc19 (2014-6818)	Nessus	Fedora Local Security Checks	medium
74388	Fedora 20 : check-mk-1.2.4p2-2.fc20 (2014-6810)	Nessus	Fedora Local Security Checks	medium

Detections

Analytics

CVE-2014-0243

medium

Tenable Plugins

medium

medium

medium