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CVE-2017-16995

Status Candidate

Overview

The check_alu_op function in kernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local users to cause a denial of service (memory corruption) or possibly have unspecified other impact by leveraging incorrect sign extension.

Related Files

Linux BPF Sign Extension Local Privilege Escalation
Posted Jul 19, 2018
Authored by h00die, Jann Horn, vnik, rlarabee, bleidl, bcoles | Site metasploit.com

Linux kernel versions prior to 4.14.8 utilize the Berkeley Packet Filter (BPF) which contains a vulnerability where it may improperly perform signing for an extension. This can be utilized to escalate privileges. The target system must be compiled with BPF support and must not have kernel.unprivileged_bpf_disabled set to 1. This Metasploit module has been tested successfully on many different kernels.

tags | exploit, kernel
systems | linux
advisories | CVE-2017-16995
MD5 | 4596fc215a7899eb6de8fccca0e92708
Linux Kernel Local Privilege Escalation
Posted Jul 12, 2018
Authored by Rick Larabee

Linux kernels prior to version 4.13.9 (Ubuntu 16.04/Fedora 27) local privilege escalation exploit.

tags | exploit, kernel, local
systems | linux, fedora, ubuntu
advisories | CVE-2017-16995
MD5 | 337790c3978495619119dc00e3b271c4
Kernel Live Patch Security Notice LSN-0037-1
Posted May 7, 2018
Authored by Benjamin M. Romer

Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel improperly performed sign extension in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. It was discovered that a race condition leading to a use-after-free vulnerability existed in the ALSA PCM subsystem of the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux
advisories | CVE-2017-0861, CVE-2017-15129, CVE-2017-16995, CVE-2017-17448, CVE-2017-17450, CVE-2018-1000199, CVE-2018-5333, CVE-2018-5344, CVE-2018-8043
MD5 | 70c039f34496a5cffda6c354f241701c
Ubuntu Security Notice USN-3633-1
Posted Apr 24, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3633-1 - Jann Horn discovered that the Berkeley Packet Filter implementation in the Linux kernel improperly performed sign extension in some situations. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2017-16995
MD5 | cd1aaf13ff30c3ce6907068a0d37963f
Ubuntu Security Notice USN-3619-2
Posted Apr 6, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3619-2 - USN-3619-1 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. Jann Horn discovered that the Berkeley Packet Filter implementation in the Linux kernel improperly performed sign extension in some situations. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-0861, CVE-2017-1000407, CVE-2017-11472, CVE-2017-15129, CVE-2017-16528, CVE-2017-16532, CVE-2017-16536, CVE-2017-16537, CVE-2017-16645, CVE-2017-16646, CVE-2017-16649, CVE-2017-16650, CVE-2017-16911, CVE-2017-16912, CVE-2017-16913, CVE-2017-16914, CVE-2017-16994, CVE-2017-16995, CVE-2017-17448, CVE-2017-17449, CVE-2017-17450, CVE-2017-17558, CVE-2017-17741, CVE-2017-17805, CVE-2017-17806, CVE-2017-17807
MD5 | bc8d51fb1a6f01647ffe1a71b00640a3
Ubuntu Security Notice USN-3619-1
Posted Apr 4, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3619-1 - Jann Horn discovered that the Berkeley Packet Filter implementation in the Linux kernel improperly performed sign extension in some situations. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that a race condition leading to a use-after-free vulnerability existed in the ALSA PCM subsystem of the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2017-0861, CVE-2017-1000407, CVE-2017-11472, CVE-2017-15129, CVE-2017-16528, CVE-2017-16532, CVE-2017-16536, CVE-2017-16537, CVE-2017-16645, CVE-2017-16646, CVE-2017-16649, CVE-2017-16650, CVE-2017-16911, CVE-2017-16912, CVE-2017-16913, CVE-2017-16914, CVE-2017-16994, CVE-2017-16995, CVE-2017-17448, CVE-2017-17449, CVE-2017-17450, CVE-2017-17558, CVE-2017-17741, CVE-2017-17805, CVE-2017-17806, CVE-2017-17807
MD5 | 4b540e0a4bb9cc36651e6f4f0e104441
Kernel Live Patch Security Notice LSN-0036-1
Posted Apr 2, 2018
Authored by Benjamin M. Romer

Wi-Fi Protected Access (WPA and WPA2) allows re-installation of the Group Temporal Key (GTK) during the group key handshake, allowing an attacker within radio range to replay frames from access points to clients. Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel improperly performed sign extension in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux
advisories | CVE-2017-13080, CVE-2017-16995
MD5 | 5db75445369ea25794ef7fbcfd8160c8
Linux Kernel Local Privilege Escalation
Posted Mar 16, 2018
Authored by Bruce Leidl

Linux Kernel versions prior to 4.4.0-116 (Ubuntu 16.04.4) local privilege escalation exploit.

tags | exploit, kernel, local
systems | linux, ubuntu
advisories | CVE-2017-16995
MD5 | 98158a55b3dac308e46b37619937ac0e
Ubuntu Security Notice USN-3523-3
Posted Jan 11, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3523-3 - Jann Horn discovered that the Berkeley Packet Filter implementation in the Linux kernel did not properly check the relationship between pointer values and the BPF stack. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Jann Horn discovered that the Berkeley Packet Filter implementation in the Linux kernel improperly performed sign extension in some situations. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2017-16995, CVE-2017-17862, CVE-2017-17863, CVE-2017-17864
MD5 | 5d97b063cad48e5c8411fa2be179fa07
Ubuntu Security Notice USN-3532-2
Posted Jan 11, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3532-2 - USN-3523-1 fixed vulnerabilities in the Linux kernel for Ubuntu 17.10. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 17.10 for Ubuntu 16.04 LTS. Jann Horn discovered that microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized memory reads via sidechannel attacks. This flaw is known as Meltdown. A local attacker could use this to expose sensitive information, including kernel memory. Various other issues were also addressed.

tags | advisory, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-16995, CVE-2017-17862, CVE-2017-17863, CVE-2017-17864, CVE-2017-5754
MD5 | c5a3f8d746ddf39bee7abb6f9185111e
Ubuntu Security Notice USN-3523-1
Posted Jan 10, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3523-1 - Jann Horn discovered that microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized memory reads via sidechannel attacks. This flaw is known as Meltdown. A local attacker could use this to expose sensitive information, including kernel memory. Jann Horn discovered that the Berkeley Packet Filter implementation in the Linux kernel did not properly check the relationship between pointer values and the BPF stack. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2017-16995, CVE-2017-17862, CVE-2017-17863, CVE-2017-17864, CVE-2017-5754
MD5 | a70e4f6712a9f397feb49e6273bf2ee5
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