Buffer overflow in Linux kernel - CVE-2016-9793

Vulnerability identifier: #VU91211

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2016-9793

CWE-ID: CWE-119

Exploitation vector: Local access

Exploit availability: Public exploit is available

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to memory corruption within the sock_setsockopt() and max_t() functions in net/core/sock.c. A local user can execute arbitrary code.

Linux kernel
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux Server for ARM
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for Power, big endian - Extended Update Support
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - Extended Update Support
Fedora
MRG Realtime
Red Hat Virtualization Host
kernel-rt (Red Hat package)
kernel (Red Hat package)
kernel

Install update from vendor's website.

kernel-rt (Red Hat package) - addressed in versions 3.10.0-514.rt56.219.el6rt, 3.10.0-514.16.1.rt56.437.el7
kernel (Red Hat package) - update to 3.10.0-514.16.1.el7
kernel - addressed in versions 4.8.13-100.fc23, 4.8.13-200.fc24, 4.8.13-300.fc25

• Exploit #9920 - Linux Kernel 3.11 < 4.8 0 - 'SO_SNDBUFFORCE' & 'SO_RCVBUFFORCE' Local Privilege Escalation (June 5, 2024)

• https://github.com/torvalds/linux/commit/b98b0bc8c431e3ceb4b26b0dfc8db509518fb290
• https://bugzilla.redhat.com/show_bug.cgi?id=1402013
• http://www.openwall.com/lists/oss-security/2016/12/03/1
• http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b98b0bc8c431e3ceb4b26b0dfc8db509518fb290
• http://www.securityfocus.com/bid/94655
• https://source.android.com/security/bulletin/2017-03-01.html
• http://www.securitytracker.com/id/1037968
• https://github.com/xairy/kernel-exploits/tree/master/CVE-2016-9793
• https://access.redhat.com/errata/RHSA-2017:0933
• https://access.redhat.com/errata/RHSA-2017:0932
• https://access.redhat.com/errata/RHSA-2017:0931

• Buffer overflow in Linux kernel core
• Fedora 25 update for kernel
• Fedora 24 update for kernel
• Fedora 23 update for kernel
• Red Hat Enterprise Linux 7 update for kernel
• Red Hat Enterprise MRG 2 update for kernel-rt
• Red Hat Enterprise Linux 7 update for kernel-rt