CVE-2016-9793: Buffer Overflow
First published: Fri Dec 02 2016(Updated: )
The sock_setsockopt function in net/core/sock.c in the Linux kernel before 4.8.14 mishandles negative values of sk_sndbuf and sk_rcvbuf, which allows local users to cause a denial of service (memory corruption and system crash) or possibly have unspecified other impact by leveraging the CAP_NET_ADMIN capability for a crafted setsockopt system call with the (1) SO_SNDBUFFORCE or (2) SO_RCVBUFFORCE option.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:3.10.0-514.16.1.rt56.437.el7 | 0:3.10.0-514.16.1.rt56.437.el7 |
| redhat/kernel | <0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| redhat/kernel-rt | <1:3.10.0-514.rt56.219.el6 | 1:3.10.0-514.rt56.219.el6 |
| redhat/kernel | <4.9 | 4.9 |
| Linux Kernel | >=3.5<3.12.69 | |
| Linux Kernel | >=3.13<3.16.40 | |
| Linux Kernel | >=3.17<3.18.52 | |
| Linux Kernel | >=3.19<4.1.50 | |
| Linux Kernel | >=4.2<4.4.38 | |
| Linux Kernel | >=4.5<4.8.14 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 | |
| Android |
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Reference Links
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b98b0bc8c431e3ceb4b26b0dfc8db509518fb290
- https://source.android.com/docs/security/bulletin/2017-03-01 (Advisory)
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14
- http://www.openwall.com/lists/oss-security/2016/12/03/1
- http://www.securityfocus.com/bid/94655
- http://www.securitytracker.com/id/1037968
- https://access.redhat.com/errata/RHSA-2017:0931
- https://access.redhat.com/errata/RHSA-2017:0932
- https://access.redhat.com/errata/RHSA-2017:0933
- https://bugzilla.redhat.com/show_bug.cgi?id=1402013
- https://github.com/torvalds/linux/commit/b98b0bc8c431e3ceb4b26b0dfc8db509518fb290
- https://github.com/xairy/kernel-exploits/tree/master/CVE-2016-9793
- https://source.android.com/security/bulletin/2017-03-01.html
- https://access.redhat.com/security/cve/CVE-2012-6704
- http://seclists.org/oss-sec/2016/q4/574
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1402014
- https://www.cve.org/CVERecord?id=CVE-2016-9793 https://nvd.nist.gov/vuln/detail/CVE-2016-9793
- https://access.redhat.com/security/cve/CVE-2016-9793
- https://git.kernel.org/linus/b98b0bc8c431e3ceb4b26b0dfc8db509518fb290
- https://security-tracker.debian.org/tracker/CVE-2016-9793
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the severity of CVE-2016-9793?
CVE-2016-9793 has been rated as a high severity vulnerability due to its potential to cause denial of service and memory corruption.
How do I fix CVE-2016-9793?
To fix CVE-2016-9793, upgrade to a kernel version newer than 4.8.14 or apply the specific patches provided by your Linux distribution.
What systems are affected by CVE-2016-9793?
CVE-2016-9793 affects various versions of the Linux kernel prior to 4.8.14 as well as several specific distributions such as Red Hat and Debian.
What type of vulnerability is CVE-2016-9793?
CVE-2016-9793 is a local denial of service vulnerability that arises from improper handling of socket options in the Linux kernel.
Can CVE-2016-9793 be exploited remotely?
No, CVE-2016-9793 requires local user access to be exploited, making it a local privilege escalation nor denial of service issue.
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