CVE-2017-8797 Detail

Current Description

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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  7.5 HIGH
Vector:  CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H


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Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b550a32e60a4941994b437a8d662432a486235a5 Exploit  Vendor Advisory 
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f961e3f2acae94b727380c0b74e2d3954d0edf79 Exploit  Vendor Advisory 
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.11.3 Release Notes  Vendor Advisory 
http://www.openwall.com/lists/oss-security/2017/06/27/5 Mailing List  Patch  VDB Entry 
http://www.securityfocus.com/bid/99298 Third Party Advisory  VDB Entry 
http://www.securitytracker.com/id/1038790 Third Party Advisory  VDB Entry 
https://access.redhat.com/errata/RHSA-2017:1842
https://access.redhat.com/errata/RHSA-2017:2077
https://access.redhat.com/errata/RHSA-2017:2437
https://access.redhat.com/errata/RHSA-2017:2669
https://bugzilla.redhat.com/show_bug.cgi?id=1466329 Issue Tracking  Third Party Advisory  VDB Entry 
https://github.com/torvalds/linux/commit/b550a32e60a4941994b437a8d662432a486235a5 Patch  Third Party Advisory 
https://github.com/torvalds/linux/commit/f961e3f2acae94b727380c0b74e2d3954d0edf79 Patch  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-129 Improper Validation of Array Index cwe source acceptance level NIST  

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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-8797
NVD Published Date:
07/02/2017
NVD Last Modified:
01/04/2018
Source:
MITRE