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Vulnerability Details : CVE-2017-8797

The NFSv4 server in the Linux kernel before 4.11.3 does not properly validate the layout type when processing the NFSv4 pNFS GETDEVICEINFO or LAYOUTGET operand in a UDP packet from a remote attacker. This type value is uninitialized upon encountering certain error conditions. This value is used as an array index for dereferencing, which leads to an OOPS and eventually a DoS of knfsd and a soft-lockup of the whole system.
Publish Date : 2017-07-02 Last Update Date : 2017-07-13
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- CVSS Scores & Vulnerability Types

CVSS Score
7.8
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
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)
CWE ID 129

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2017:1842: kernel security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20171842 unix
RHSA-2017:2077: kernel-rt security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20172077 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-2017-8797

# Product Type Vendor Product Version Update Edition Language
1 OS Linux Linux Kernel 4.11.2 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Linux Linux Kernel 1

- References For CVE-2017-8797

http://www.securitytracker.com/id/1038790
SECTRACK 1038790
https://bugzilla.redhat.com/show_bug.cgi?id=1466329
https://github.com/torvalds/linux/commit/b550a32e60a4941994b437a8d662432a486235a5
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f961e3f2acae94b727380c0b74e2d3954d0edf79
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.11.3
http://www.openwall.com/lists/oss-security/2017/06/27/5
http://www.securityfocus.com/bid/99298
BID 99298 Linux Kernel CVE-2017-8797 Denial of Service Vulnerability Release Date:2017-06-28
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b550a32e60a4941994b437a8d662432a486235a5
https://github.com/torvalds/linux/commit/f961e3f2acae94b727380c0b74e2d3954d0edf79

- Metasploit Modules Related To CVE-2017-8797

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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