CVE-2015-6937: Null Pointer Dereference
First published: Tue Sep 15 2015(Updated: )
It was found that the Linux kernel's Reliable Datagram Sockets (RDS) protocol implementation did not verify that an underlying transport exists when creating a connection to a remote server. This could happen on sockets that were not properly bound before attempting to send a message. A local attacker could use this flaw to crash the system by creating sockets at specific times to trigger a NULL pointer dereference on the system. Upstream patch: <a href="https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=74e98eb085889b0d2d4908f59f6e00026063014f">https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=74e98eb085889b0d2d4908f59f6e00026063014f</a> CVE assignment: <a href="http://seclists.org/oss-sec/2015/q3/545">http://seclists.org/oss-sec/2015/q3/545</a>
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <=4.2.3 | |
| Canonical Ubuntu Linux | =12.04 | |
| Canonical Ubuntu Linux | =14.04 | |
| Debian Debian Linux | =7.0 | |
| Debian Debian Linux | =8.0 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.5-1 6.11.7-1 |
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Reference Links
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=74e98eb085889b0d2d4908f59f6e00026063014f
- http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168447.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168539.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-September/167358.html
- http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00009.html
- http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00035.html
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00026.html
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00031.html
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00007.html
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00009.html
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00013.html
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00017.html
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00018.html
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00019.html
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00020.html
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00021.html
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00022.html
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00034.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html
- http://lists.opensuse.org/opensuse-updates/2015-12/msg00039.html
- http://www.debian.org/security/2015/dsa-3364
- http://www.openwall.com/lists/oss-security/2015/09/14/3
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- http://www.securityfocus.com/bid/76767
- http://www.securitytracker.com/id/1034453
- http://www.ubuntu.com/usn/USN-2773-1
- http://www.ubuntu.com/usn/USN-2774-1
- http://www.ubuntu.com/usn/USN-2777-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1263139
- https://github.com/torvalds/linux/commit/74e98eb085889b0d2d4908f59f6e00026063014f
- https://launchpad.net/bugs/cve/CVE-2015-6937
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=74e98eb085889b0d2d4908f59f6e00026063014f
- http://seclists.org/oss-sec/2015/q3/545
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1263140
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2015-7990
- http://seclists.org/oss-sec/2015/q4/179
- https://security-tracker.debian.org/tracker/CVE-2015-6937
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-6937
- https://nvd.nist.gov/vuln/detail/CVE-2015-6937
- https://ubuntu.com/security/CVE-2015-6937
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2015-6937.
What is the severity of CVE-2015-6937?
CVE-2015-6937 has a medium severity rating.
How does CVE-2015-6937 impact the Linux kernel?
CVE-2015-6937 allows local users to cause a denial of service or possibly have other unspecified impact by using a socket that was not properly bound.
Which software versions are affected by CVE-2015-6937?
The Linux kernel versions through 4.2.3 are affected.
How can I fix CVE-2015-6937?
Update your Linux kernel to version 4.3 or higher.
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