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CVE-2017-7308

Status Candidate

Overview

The packet_set_ring function in net/packet/af_packet.c in the Linux kernel through 4.10.6 does not properly validate certain block-size data, which allows local users to cause a denial of service (integer signedness error and out-of-bounds write), or gain privileges (if the CAP_NET_RAW capability is held), via crafted system calls.

Related Files

Red Hat Security Advisory 2018-1854-01
Posted Jun 19, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-1854-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include bypass, denial of service, and null pointer vulnerabilities.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2012-6701, CVE-2015-8830, CVE-2016-8650, CVE-2017-12190, CVE-2017-15121, CVE-2017-18203, CVE-2017-2671, CVE-2017-6001, CVE-2017-7308, CVE-2017-7616, CVE-2017-7889, CVE-2017-8890, CVE-2017-9075, CVE-2017-9076, CVE-2017-9077, CVE-2018-1130, CVE-2018-3639, CVE-2018-5803
MD5 | 735a86a96b8c149318b97e23daba46be
AF_PACKET packet_set_ring Privilege Escalation
Posted May 17, 2018
Authored by Brendan Coles, Andrey Konovalov | Site metasploit.com

This Metasploit module exploits a heap-out-of-bounds write in the packet_set_ring function in net/packet/af_packet.c (AF_PACKET) in the Linux kernel to execute code as root (CVE-2017-7308). The bug was initially introduced in 2011 and patched in version 4.10.6, potentially affecting a large number of kernels; however this exploit targets only systems using Ubuntu Xenial kernels 4.8.0 < 4.8.0-46, including Linux distros based on Ubuntu Xenial, such as Linux Mint. The target system must have unprivileged user namespaces enabled and two or more CPU cores. Bypasses for SMEP, SMAP and KASLR are included. Failed exploitation may crash the kernel. This Metasploit module has been tested successfully on Linux Mint 18 (x86_64) with kernel versions: 4.8.0-34-generic; 4.8.0-36-generic; 4.8.0-39-generic; 4.8.0-41-generic; 4.8.0-42-generic; 4.8.0-44-generic; 4.8.0-45-generic.

tags | exploit, kernel, root
systems | linux, ubuntu
advisories | CVE-2017-7308
MD5 | 619464075778b62a92b3753066e120ba
Red Hat Security Advisory 2017-1298-01
Posted May 26, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-1298-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix: It was found that the packet_set_ring() function of the Linux kernel's networking implementation did not properly validate certain block-size data. A local attacker with CAP_NET_RAW capability could use this flaw to trigger a buffer overflow, resulting in the crash of the system. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.

tags | advisory, overflow, kernel, local
systems | linux, redhat
advisories | CVE-2016-10208, CVE-2016-7910, CVE-2016-8646, CVE-2017-7308
MD5 | 68246d6f7e533ab05baff2d7cbd62ba1
Red Hat Security Advisory 2017-1297-01
Posted May 26, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-1297-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix: It was found that the packet_set_ring() function of the Linux kernel's networking implementation did not properly validate certain block-size data. A local attacker with CAP_NET_RAW capability could use this flaw to trigger a buffer overflow, resulting in the crash of the system. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.

tags | advisory, overflow, kernel, local
systems | linux, redhat
advisories | CVE-2016-10208, CVE-2016-7910, CVE-2016-8646, CVE-2017-7308
MD5 | 4b41d19f3dbd1570049ac04179f9d1a3
Red Hat Security Advisory 2017-1308-01
Posted May 26, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-1308-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: It was found that the packet_set_ring() function of the Linux kernel's networking implementation did not properly validate certain block-size data. A local attacker with CAP_NET_RAW capability could use this flaw to trigger a buffer overflow, resulting in the crash of the system. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.

tags | advisory, overflow, kernel, local
systems | linux, redhat
advisories | CVE-2016-10208, CVE-2016-7910, CVE-2016-8646, CVE-2017-5986, CVE-2017-7308
MD5 | 1a4da6d2bc02d3fd97903c280961b160
Kernel Live Patch Security Notice LSN-0021-1
Posted Apr 15, 2017
Authored by Benjamin M. Romer

Several security issues were fixed in the kernel. Andrey Konovalov discovered that the AF_PACKET implementation in the Linux kernel did not properly validate certain block-size data. A local attacker could use this to cause a denial of service (system crash). Andrey Konovalov discovered a use-after-free vulnerability in the DCCP implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly gain administrative privileges. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux
advisories | CVE-2016-5195, CVE-2016-7910, CVE-2016-7911, CVE-2016-7912, CVE-2016-7916, CVE-2016-8399, CVE-2016-8630, CVE-2016-8633, CVE-2016-9191, CVE-2016-9555, CVE-2016-9756, CVE-2017-2583, CVE-2017-6074, CVE-2017-7308
MD5 | 878ad898ccfcd692664025f15c5ea754
Ubuntu Security Notice USN-3256-2
Posted Apr 5, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3256-2 - USN-3256-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 16.10. This update provides the corresponding updates for the Linux Hardware Enablement kernel for each of the respective prior Ubuntu LTS releases. Andrey Konovalov discovered that the AF_PACKET implementation in the Linux kernel did not properly validate certain block-size data. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-7308
MD5 | f8656c64a6b04856b436af63a16837e2
Ubuntu Security Notice USN-3256-1
Posted Apr 5, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3256-1 - Andrey Konovalov discovered that the AF_PACKET implementation in the Linux kernel did not properly validate certain block-size data. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2017-7308
MD5 | cc98d7a3d09a559b20ce332f3280ac93
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