National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

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.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 7.5 HIGH
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (V3 legend)
Impact Score: 3.6
Exploitability Score: 3.9


Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 7.8 HIGH
Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:C) (V2 legend)
Impact Subscore: 6.9
Exploitability Subscore: 10.0


Access Vector (AV): Network
Access Complexity (AC): Insufficient_Info
Authentication (AU): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Complete
Additional Information:
Allows disruption of service

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

Technical Details

Vulnerability Type (View All)

  • Improper Validation of Array Index (CWE-129)

Known Affected Software Configurations Switch to CPE 2.3

Configuration 1 ( hide )
 cpe:/o:linux:linux_kernel
     Show Matching CPE(s)
Up to (including)
4.11.2


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