Link following in Fedora and Ansible - CVE-2016-3096
Published: June 3, 2016 / Updated: August 9, 2020
Vulnerability identifier: #VU40252
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2016-3096
CWE-ID: CWE-59
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Fedoraproject
Red Hat Inc.
Red Hat Inc.
Affected software:
Fedora
Ansible
Fedora
Ansible
Detailed vulnerability description
The vulnerability allows a local authenticated user to execute arbitrary code.
The create_script function in the lxc_container module in Ansible before 1.9.6-1 and 2.x before 2.0.2.0 allows local users to write to arbitrary files or gain privileges via a symlink attack on (1) /opt/.lxc-attach-script, (2) the archived container in the archive_path directory, or the (3) lxc-attach-script.log or (4) lxc-attach-script.err files in the temporary directory.
How to mitigate CVE-2016-3096
Install update from vendor's website.
Sources
- http://lists.fedoraproject.org/pipermail/package-announce/2016-April/183103.html
- http://lists.fedoraproject.org/pipermail/package-announce/2016-April/183132.html
- http://lists.fedoraproject.org/pipermail/package-announce/2016-April/183252.html
- http://lists.fedoraproject.org/pipermail/package-announce/2016-April/183274.html
- http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184175.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1322925
- https://github.com/ansible/ansible/blob/v1.9.6-1/CHANGELOG.md#196-dancing-in-the-street---tbd
- https://github.com/ansible/ansible/blob/v2.0.2.0-1/CHANGELOG.md#202-over-the-hills-and-far-away
- https://github.com/ansible/ansible-modules-extras/pull/1941
- https://github.com/ansible/ansible-modules-extras/pull/1941/commits/8c6fe646ee79f5e55361b885b7efed5bec72d4a4
- https://groups.google.com/forum/#!topic/ansible-announce/E80HLZilTU0
- https://groups.google.com/forum/#!topic/ansible-announce/tqiZbcWxYig
- https://security.gentoo.org/glsa/201607-14