Link following in Ansible and Fedora - CVE-2016-3096
Published: June 3, 2016 / Updated: August 9, 2020
Vulnerability identifier: #VU40252
CSH Severity: Low
CVSS v4: 8.5 [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]
CVE-ID: CVE-2016-3096
CWE-ID: CWE-59
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Ansible
Fedora
Gentoo Linux
ansible1.9
ansible
Fedora
Gentoo Linux
ansible1.9
ansible
How to mitigate CVE-2016-3096
Install update from vendor's website.
ansible1.9 - addressed in versions 1.9.6-1.el6, 1.9.6-1.el7, 1.9.6-1.fc22, 1.9.6-1.fc23, 1.9.6-2.el6, 1.9.6-2.el7
ansible - addressed in versions 2.0.2.0-1.el6, 2.0.2.0-1.el7, 2.0.2.0-1.fc22, 2.0.2.0-1.fc23, 2.0.2.0-1.fc24
ansible - addressed in versions 2.0.2.0-1.el6, 2.0.2.0-1.el7, 2.0.2.0-1.fc22, 2.0.2.0-1.fc23, 2.0.2.0-1.fc24
External References
- 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
Related Security Bulletins
- Link following in Fedoraproject Fedora
- Gentoo update for Ansible
- Fedora 23 update for ansible1.9
- Fedora 22 update for ansible1.9
- Fedora EPEL 7 update for ansible1.9
- Fedora EPEL 6 update for ansible1.9
- Fedora 24 update for ansible
- Fedora 23 update for ansible
- Fedora 22 update for ansible
- Fedora EPEL 7 update for ansible
- Fedora EPEL 6 update for ansible
- Fedora EPEL 7 update for ansible1.9
- Fedora EPEL 6 update for ansible1.9