CVE-2013-7446: Use After Free
First published: Tue Nov 17 2015(Updated: )
A flaw was found in the Linux kernels implementation of Unix sockets. A server polling for data coming from a client socket may put the peer socket on a wait list. This peer may close the connection making the reference on the wait list no longer valid. This could lead to bypssing the permissions on a unix socket, and packets being injected into the stream. This may also panic the machine. Additional resources: <a href="https://groups.google.com/forum/#!topic/syzkaller/3twDUI4Cpm8">https://groups.google.com/forum/#!topic/syzkaller/3twDUI4Cpm8</a> <a href="http://seclists.org/oss-sec/2015/q4/321">http://seclists.org/oss-sec/2015/q4/321</a> <a href="https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=7d267278a9ece963d77eefec61630223fce08c6c">https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=7d267278a9ece963d77eefec61630223fce08c6c</a>
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <=4.3.2 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.11.10-1 6.12.5-1 |
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Reference Links
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7d267278a9ece963d77eefec61630223fce08c6c
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00033.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00034.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00035.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00037.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00038.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00039.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00040.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00041.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00042.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00043.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00044.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00045.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00003.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00008.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00009.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00014.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00015.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00016.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00017.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00018.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00019.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00020.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00021.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00022.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00023.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00026.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html
- http://www.debian.org/security/2015/dsa-3426
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.3
- http://www.openwall.com/lists/oss-security/2015/11/18/16
- http://www.securityfocus.com/bid/77638
- http://www.securitytracker.com/id/1034557
- http://www.spinics.net/lists/netdev/msg318826.html
- http://www.ubuntu.com/usn/USN-2886-1
- http://www.ubuntu.com/usn/USN-2887-1
- http://www.ubuntu.com/usn/USN-2887-2
- http://www.ubuntu.com/usn/USN-2888-1
- http://www.ubuntu.com/usn/USN-2889-1
- http://www.ubuntu.com/usn/USN-2889-2
- http://www.ubuntu.com/usn/USN-2890-1
- http://www.ubuntu.com/usn/USN-2890-2
- http://www.ubuntu.com/usn/USN-2890-3
- https://bugzilla.redhat.com/show_bug.cgi?id=1282688
- https://forums.grsecurity.net/viewtopic.php?f=3&t=4150
- https://github.com/torvalds/linux/commit/7d267278a9ece963d77eefec61630223fce08c6c
- https://groups.google.com/forum/#!topic/syzkaller/3twDUI4Cpm8
- https://lkml.org/lkml/2013/10/14/424
- https://lkml.org/lkml/2014/5/15/532
- https://lkml.org/lkml/2015/9/13/195
- https://forums.grsecurity.net/viewtopic.php?f=3&t=4150
- https://groups.google.com/forum/#%21topic/syzkaller/3twDUI4Cpm8
- https://launchpad.net/bugs/cve/CVE-2013-7446
- http://seclists.org/oss-sec/2015/q4/321
- https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=7d267278a9ece963d77eefec61630223fce08c6c
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1282712
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1273845
- https://access.redhat.com/support/policy/updates/errata/
- https://bugzilla.redhat.com/show_bug.cgi?id=1273845
- https://www.openwall.com/lists/oss-security/2015/11/18/9
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ec0d215f9420564fc8286dcf93d2d068bb53a07e
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7d267278a9ece963d77eefec61630223fce08c6c
- https://security-tracker.debian.org/tracker/CVE-2013-7446
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-7446
- https://nvd.nist.gov/vuln/detail/CVE-2013-7446
- https://ubuntu.com/security/CVE-2013-7446
Frequently Asked Questions
What is CVE-2013-7446?
CVE-2013-7446 is a use-after-free vulnerability in net/unix/af_unix.c in the Linux kernel before 4.3.3.
How does CVE-2013-7446 affect the Linux kernel?
CVE-2013-7446 allows local users to bypass intended AF_UNIX socket permissions or cause a denial of service (panic) via crafted epoll_ctl calls.
What is the severity of CVE-2013-7446?
CVE-2013-7446 has a severity level of medium.
Which versions of the Linux kernel are affected by CVE-2013-7446?
The Linux kernel versions before 4.3.3 are affected by CVE-2013-7446.
How can I fix CVE-2013-7446?
To fix CVE-2013-7446, you need to update your Linux kernel to version 4.3.3 or later.
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