National Vulnerability Database

National Vulnerability Database

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    Vulnerabilities Detail

CVE-2017-7979 Detail

Current Description

The cookie feature in the packet action API implementation in net/sched/act_api.c in the Linux kernel 4.11.x through 4.11-rc7 mishandles the tb nlattr array, which allows local users to cause a denial of service (uninitialized memory access and refcount underflow, and system hang or crash) or possibly have unspecified other impact via "tc filter add" commands in certain contexts. NOTE: this does not affect stable kernels, such as 4.10.x, from kernel.org.

Source:  MITRE
Description Last Modified:  04/19/2017
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 7.8 HIGH
Vector: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (V3 legend)
Impact Score: 5.9
Exploitability Score: 1.8

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

CVSS v2.0 Severity and Metrics:

Base Score: 7.2 HIGH
Vector: (AV:L/AC:L/Au:N/C:C/I:C/A:C) (V2 legend)
Impact Subscore: 10.0
Exploitability Subscore: 3.9

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

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://marc.info/?l=linux-netdev&m=149200742616349 Mailing List Patch Third Party Advisory
http://marc.info/?l=linux-netdev&m=149200746116365 Mailing List Patch Third Party Advisory
http://marc.info/?l=linux-netdev&m=149200746116366 Mailing List Patch Third Party Advisory
http://marc.info/?l=linux-netdev&m=149251041420194 Mailing List Patch Third Party Advisory
http://marc.info/?l=linux-netdev&m=149251041420195 Mailing List Patch Third Party Advisory
http://www.securityfocus.com/bid/97969
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1682368 Issue Tracking Patch
https://bugzilla.proxmox.com/show_bug.cgi?id=1351 Issue Tracking Patch

Technical Details

Vulnerability Type (View All)

Change History

2 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-7979
NVD Published Date:
04/19/2017
NVD Last Modified:
04/25/2017