CVE-2016-9793

Impact:
Moderate
Public Date:
2016-12-02
CWE:
CWE-190
Bugzilla:
1402013: CVE-2016-9793 kernel: Signed overflow for SO_{SND|RCV}BUFFORCE
A flaw was found in the Linux kernel's implementation of setsockopt for the SO_{SND|RCV}BUFFORCE setsockopt() system call. Users with non-namespace CAP_NET_ADMIN are able to trigger this call and create a situation in which the sockets sendbuff data size could be negative. This could adversely affect memory allocations and create situations where the system could crash or cause memory corruption.

Find out more about CVE-2016-9793 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

This issue does not affect the kernels as shipping with Red Hat Enterprise Linux 5 and 6. This issue does affect kernels 7, MRG-2 and realtime kernels and plans to be fixed in a future update.

CVSS v2 metrics

Base Score 6.9
Base Metrics AV:L/AC:M/Au:N/C:C/I:C/A:C
Access Vector Local
Access Complexity Medium
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete

CVSS v3 metrics

CVSS3 Base Score 6.7
CVSS3 Base Metrics CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required High
User Interaction None
Scope Unchanged
Confidentiality High
Integrity Impact High
Availability Impact High

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat MRG Grid for RHEL 6 Server v.2 (kernel-rt) RHSA-2017:0932 2017-04-12
Red Hat Enterprise Linux 7 (kernel) RHSA-2017:0933 2017-04-12
Red Hat Enterprise Linux for Real Time for NFV (v. 7) (kernel-rt) RHSA-2017:0931 2017-04-12

Affected Packages State

Platform Package State
Red Hat Enterprise MRG 2 realtime-kernel Will not fix
Red Hat Enterprise Linux 6 kernel Not affected
Red Hat Enterprise Linux 5 kernel Not affected

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