National Vulnerability Database

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    Vulnerabilities Detail

CVE-2016-9793 Detail

Current Description

The sock_setsockopt function in net/core/sock.c in the Linux kernel before 4.8.14 mishandles negative values of sk_sndbuf and sk_rcvbuf, which allows local users to cause a denial of service (memory corruption and system crash) or possibly have unspecified other impact by leveraging the CAP_NET_ADMIN capability for a crafted setsockopt system call with the (1) SO_SNDBUFFORCE or (2) SO_RCVBUFFORCE option.

Source:  MITRE
Description Last Modified:  12/28/2016
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): Low
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://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b98b0bc8c431e3ceb4b26b0dfc8db509518fb290 Patch Vendor Advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14 Release Notes
http://www.openwall.com/lists/oss-security/2016/12/03/1 Mailing List Patch
http://www.securityfocus.com/bid/94655
http://www.securitytracker.com/id/1037968
https://access.redhat.com/errata/RHSA-2017:0931
https://access.redhat.com/errata/RHSA-2017:0932
https://access.redhat.com/errata/RHSA-2017:0933
https://bugzilla.redhat.com/show_bug.cgi?id=1402013 Issue Tracking
https://github.com/torvalds/linux/commit/b98b0bc8c431e3ceb4b26b0dfc8db509518fb290 Patch Vendor Advisory
https://github.com/xairy/kernel-exploits/tree/master/CVE-2016-9793
https://source.android.com/security/bulletin/2017-03-01.html

Technical Details

Vulnerability Type (View All)

Change History

6 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2016-9793
NVD Published Date:
12/28/2016
NVD Last Modified:
01/04/2018