CVE-2017-8797

 

Published at: - 02-07-2017 07:29

Last modified: - 26-10-2022 01:44

Total changes: - 3

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

 

Verification logic

 

Reference

• https://github.com/torvalds/linux/commit/f961e3f2acae94b727380c0b74e2d3954d0edf79
• https://github.com/torvalds/linux/commit/b550a32e60a4941994b437a8d662432a486235a5
• https://bugzilla.redhat.com/show_bug.cgi?id=1466329
• http://www.openwall.com/lists/oss-security/2017/06/27/5
• http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.11.3
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f961e3f2acae94b727380c0b74e2d3954d0edf79
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b550a32e60a4941994b437a8d662432a486235a5
• 99298-Third Party Advisory, VDB Entry
• 1038790-Third Party Advisory, VDB Entry
• RHSA-2017:2669-
• RHSA-2017:2437-
• RHSA-2017:2077-
• RHSA-2017:1842-

 

Keywords

NVD

 

CVE-2017-8797

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures