CVE-2016-3707
First published: Fri Apr 15 2016(Updated: )
A flaw was found in the kernel-rt in which an attacker could submit a specially crafted ICMP echo request which can trigger a sysrq function based on values in the ICMP packet. This feature was introduced in the kernel-rt only and is not shipping with standard Red Hat Enterprise Linux kernels. Remote attacker could exploit this feature using bruteforce to submit arbitrary SysRq commands. Resources: <a href="https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patch-4.4.7-rt16.patch.gz">https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patch-4.4.7-rt16.patch.gz</a> Upstream discussion: <a href="https://lwn.net/Articles/448790/">https://lwn.net/Articles/448790/</a> CVE request: <a href="http://seclists.org/oss-sec/2016/q2/349">http://seclists.org/oss-sec/2016/q2/349</a>
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel RT | <=3.10.0 | |
| Red Hat Enterprise Linux for Real Time | =7 | |
| Red Hat Enterprise Linux for Real Time for NFV | =7 | |
| SUSE Linux Enterprise Real Time Extension | =12.0-sp1 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00005.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00007.html
- http://www.openwall.com/lists/oss-security/2016/05/17/1
- https://access.redhat.com/errata/RHSA-2016:1301
- https://access.redhat.com/errata/RHSA-2016:1341
- https://bugzilla.redhat.com/show_bug.cgi?id=1327484
- https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patch-4.4.7-rt16.patch.gz
- https://lwn.net/Articles/448790/
- http://seclists.org/oss-sec/2016/q2/349
Frequently Asked Questions
What is the severity of CVE-2016-3707?
CVE-2016-3707 has been classified as a moderate severity vulnerability.
How do I fix CVE-2016-3707?
To fix CVE-2016-3707, it is recommended to update the kernel-rt to a version that is higher than 3.10.0.
Who is affected by CVE-2016-3707?
CVE-2016-3707 affects systems running kernel-rt versions up to 3.10.0, specifically Red Hat Enterprise Linux for Real Time and SUSE Linux Enterprise Real Time Extension.
What type of attack does CVE-2016-3707 enable?
CVE-2016-3707 allows an attacker to submit a crafted ICMP echo request, potentially triggering unintended kernel behavior.
Is CVE-2016-3707 present in standard Red Hat kernels?
No, CVE-2016-3707 specifically affects the kernel-rt and is not present in standard Red Hat Enterprise Linux kernels.
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