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CVE-2016-9793

Status Candidate

Overview

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.

Related Files

Linux Kernel SO_SNDBUFFORCE / SO_RCVBUFFORCE Local Privilege Escalation
Posted May 12, 2017
Authored by Andrey Konovalov

Linux kernel versions 3.11 through 4.8 O_SNDBUFFORCE and SO_RCVBUFFORCE local privilege escalation exploit.

tags | exploit, kernel, local
systems | linux
advisories | CVE-2016-9793
SHA-256 | 3f9a6416a28509909106dbad3e284de2a20f84d964933b9948e0de462f67f961
Red Hat Security Advisory 2017-0933-01
Posted Apr 12, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-0933-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. These updated kernel packages include several security issues and numerous bug fixes. Space precludes documenting all of these bug fixes in this advisory.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2016-8650, CVE-2016-9793, CVE-2017-2618, CVE-2017-2636
SHA-256 | d62a22056f77c69b85be3432a3ddad3618fb07b8bf190c3dd156126b15c687aa
Red Hat Security Advisory 2017-0932-01
Posted Apr 12, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-0932-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix: A race condition flaw was found in the N_HLDC Linux kernel driver when accessing n_hdlc.tbuf list that can lead to double free. A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2016-8650, CVE-2016-9793, CVE-2017-2618, CVE-2017-2636, CVE-2017-6074
SHA-256 | b6e837c5c6ec5d457e2ca9d9145c07e4d2242405330b287dec280775937eae69
Red Hat Security Advisory 2017-0931-01
Posted Apr 12, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-0931-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix: A race condition flaw was found in the N_HLDC Linux kernel driver when accessing n_hdlc.tbuf list that can lead to double free. A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2016-8650, CVE-2016-9793, CVE-2017-2618, CVE-2017-2636
SHA-256 | 714e1be0b6af4319eb0e7f445bb8e74fce8c80e69b24a9160355e5649e77166a
Ubuntu Security Notice USN-3168-2
Posted Jan 11, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3168-2 - USN-3168-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 14.04 LTS for Ubuntu 12.04 LTS. Dmitry Vyukov discovered that the KVM implementation in the Linux kernel did not properly initialize the Code Segment in certain error cases. A local attacker could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2016-9756, CVE-2016-9793, CVE-2016-9794, CVE-2016-9806
SHA-256 | 9012cf3de066704f3448524d520c803cb2d915bc3249eb551d28620e06df1168
Ubuntu Security Notice USN-3170-2
Posted Jan 11, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3170-2 - Andrey Konovalov discovered that the ipv6 icmp implementation in the Linux kernel did not properly check data structures on send. A remote attacker could use this to cause a denial of service. Andrey Konovalov discovered that signed integer overflows existed in the setsockopt system call when handling the SO_SNDBUFFORCE and SO_RCVBUFFORCE options. A local attacker with the CAP_NET_ADMIN capability could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2016-9793, CVE-2016-9919
SHA-256 | 5786a48bfee937cace3b7751bb9c0eb7fbf315f58862c75f47d84d7b98c0176a
Ubuntu Security Notice USN-3170-1
Posted Jan 11, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3170-1 - Dmitry Vyukov discovered that the KVM implementation in the Linux kernel did not properly initialize the Code Segment in certain error cases. A local attacker could use this to expose sensitive information. Andrey Konovalov discovered that signed integer overflows existed in the setsockopt system call when handling the SO_SNDBUFFORCE and SO_RCVBUFFORCE options. A local attacker with the CAP_NET_ADMIN capability could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2016-9756, CVE-2016-9793
SHA-256 | 8b5deb1e0f7e97d4868b245412489de596a91259b71ec62afa0324b5a3cfb218
Ubuntu Security Notice USN-3169-4
Posted Jan 11, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3169-4 - Baozeng Ding discovered a race condition that could lead to a use-after- free in the Advanced Linux Sound Architecture subsystem of the Linux kernel. A local attacker could use this to cause a denial of service. Andrey Konovalov discovered that signed integer overflows existed in the setsockopt system call when handling the SO_SNDBUFFORCE and SO_RCVBUFFORCE options. A local attacker with the CAP_NET_ADMIN capability could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2016-9793, CVE-2016-9794
SHA-256 | 2a5b1accc9fa7ee63cafa4ed9b4df84e0ac64f121f269ac3933f510b64ce879b
Ubuntu Security Notice USN-3169-2
Posted Jan 11, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3169-2 - USN-3169-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 LTS. Dmitry Vyukov discovered that the KVM implementation in the Linux kernel did not properly initialize the Code Segment in certain error cases. A local attacker could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2016-9756, CVE-2016-9793, CVE-2016-9794
SHA-256 | eec4c4078812efef1c4d5f58451bc04fdbbba03ff36f6b8f1101a3d55a08e61d
Ubuntu Security Notice USN-3169-1
Posted Jan 11, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3169-1 - Dmitry Vyukov discovered that the KVM implementation in the Linux kernel did not properly initialize the Code Segment in certain error cases. A local attacker could use this to expose sensitive information. Andrey Konovalov discovered that signed integer overflows existed in the setsockopt system call when handling the SO_SNDBUFFORCE and SO_RCVBUFFORCE options. A local attacker with the CAP_NET_ADMIN capability could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2016-9756, CVE-2016-9793, CVE-2016-9794
SHA-256 | b205b7bca26c5804b31607e4396a608147e37d7a7cf4e77f7c062bf109ca668e
Ubuntu Security Notice USN-3169-3
Posted Jan 11, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3169-3 - Baozeng Ding discovered a race condition that could lead to a use-after- free in the Advanced Linux Sound Architecture subsystem of the Linux kernel. A local attacker could use this to cause a denial of service. Andrey Konovalov discovered that signed integer overflows existed in the setsockopt system call when handling the SO_SNDBUFFORCE and SO_RCVBUFFORCE options. A local attacker with the CAP_NET_ADMIN capability could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2016-9793, CVE-2016-9794
SHA-256 | d3403b1006b1e8fd0657e2be84c9345e2be906fd30489b587982b7e306ba0409
Ubuntu Security Notice USN-3168-1
Posted Jan 11, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3168-1 - Dmitry Vyukov discovered that the KVM implementation in the Linux kernel did not properly initialize the Code Segment in certain error cases. A local attacker could use this to expose sensitive information. Andrey Konovalov discovered that signed integer overflows existed in the setsockopt system call when handling the SO_SNDBUFFORCE and SO_RCVBUFFORCE options. A local attacker with the CAP_NET_ADMIN capability could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2016-9756, CVE-2016-9793, CVE-2016-9794, CVE-2016-9806
SHA-256 | 6ae254d390465843f0520c113fcc5fac33d391e5003e4cab5a57c6df6966df42
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