The Netlink implementation in the Linux kernel through 3.14.1 does not provide a mechanism for authorizing socket operations based on the opener of a socket, which allows local users to bypass intended access restrictions and modify network configurations by using a Netlink socket for the (1) stdout or (2) stderr of a setuid program.

References

• https://nvd.nist.gov/vuln/detail/CVE-2014-0181
• https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=90f62cf30a78721641e08737bda787552428061e
• https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.10.45
• https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.14.9
• http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00010.html
• http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00025.html
• http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00000.html
• http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00015.html
• http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00020.html
• http://marc.info/?l=linux-netdev&m=139828832919748&w=2
• http://rhn.redhat.com/errata/RHSA-2014-1959.html
• http://www.openwall.com/lists/oss-security/2014/04/23/6
• http://www.openwall.com/lists/oss-security/2023/04/16/3