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Vulnerability Details : CVE-2017-7308

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.
Publish Date : 2017-03-29 Last Update Date : 2018-01-04
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of ServiceOverflowGain privileges
CWE ID 119

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2017:1298: kernel-rt security and bug fix update (Important) oval:com.redhat.rhsa:def:20171298 unix
RHSA-2017:1308: kernel security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20171308 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2017-7308

# Product Type Vendor Product Version Update Edition Language
1 OS Linux Linux Kernel 4.10.6 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Linux Linux Kernel 1

- References For CVE-2017-7308 CONFIRM CONFIRM CONFIRM
BID 97234 Linux kernel CVE-2017-7308 Local Denial of Service Vulnerability Release Date:2017-08-01
REDHAT RHSA-2017:1308
REDHAT RHSA-2017:1298

- Metasploit Modules Related To CVE-2017-7308

AF_PACKET packet_set_ring Privilege Escalation
This 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 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.
Module type : exploit Rank : good Platforms : Linux

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