Executive Summary

Summary
Title kernel security and bug fix update
Informations
Name RHSA-2016:1815 First vendor Publication 2016-09-06
Vendor RedHat Last vendor Modification 2016-09-06
Severity (Vendor) N/A Revision 01

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:N/I:P/A:P)
Cvss Base Score 5.8 Attack Range Network
Cvss Impact Score 4.9 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Problem Description:

An update for kernel is now available for Red Hat Enterprise Linux 6.7 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux HPC Node EUS (v. 6.7) - noarch, x86_64 Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) - x86_64 Red Hat Enterprise Linux Server EUS (v. 6.7) - i386, noarch, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional EUS (v. 6.7) - i386, ppc64, s390x, x86_64

3. Description:

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

* It was found that the RFC 5961 challenge ACK rate limiting as implemented in the Linux kernel's networking subsystem allowed an off-path attacker to leak certain information about a given connection by creating congestion on the global challenge ACK rate limit counter and then measuring the changes by probing packets. An off-path attacker could use this flaw to either terminate TCP connection and/or inject payload into non-secured TCP connection between two endpoints on the network. (CVE-2016-5696, Important)

Red Hat would like to thank Yue Cao (Cyber Security Group of the CS department of University of California in Riverside) for reporting this issue.

Bug Fix(es):

* When an interrupt request occurred and the new API was scheduled on a different CPU, the enic driver previously generated a warning message. This behavior was caused by a race condition between the vnic_intr_unmask() function and the enic_poll_unlock_napi() function. This update fixes the napi_poll() function to unlock before unmasking the interrupt. As a result, the warning message no longer occurs in the described situation. (BZ#1351192)

4. Solution:

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

5. Bugs fixed (https://bugzilla.redhat.com/):

1354708 - CVE-2016-5696 kernel: challenge ACK counter information disclosure.

Original Source

Url : https://rhn.redhat.com/errata/RHSA-2016-1815.html

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-200 Information Exposure

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 2
Application 1
Application 2
Os 58
Os 2596

Snort® IPS/IDS

Date Description
2018-05-23 Linux Kernel Challenge ACK provocation attempt
RuleID : 40063-community - Revision : 5 - Type : OS-LINUX
2016-10-11 Linux Kernel Challenge ACK provocation attempt
RuleID : 40063 - Revision : 5 - Type : OS-LINUX

Nessus® Vulnerability Scanner

Date Description
2018-02-28 Name : The version of Arista Networks EOS running on the remote device is affected b...
File : arista_eos_sa0023.nasl - Type : ACT_GATHER_INFO
2017-05-25 Name : The remote host is affected by multiple vulnerabilities.
File : palo_alto_pan-os_7_0_15.nasl - Type : ACT_GATHER_INFO
2017-05-01 Name : The remote EulerOS host is missing multiple security updates.
File : EulerOS_SA-2016-1043.nasl - Type : ACT_GATHER_INFO
2017-04-03 Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2017-0057.nasl - Type : ACT_GATHER_INFO
2017-02-16 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-0471-1.nasl - Type : ACT_GATHER_INFO
2017-02-10 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-0437-1.nasl - Type : ACT_GATHER_INFO
2016-12-07 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2016-1410.nasl - Type : ACT_GATHER_INFO
2016-12-05 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2016-2976-1.nasl - Type : ACT_GATHER_INFO
2016-11-28 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2016-2912-1.nasl - Type : ACT_GATHER_INFO
2016-10-27 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2016-1227.nasl - Type : ACT_GATHER_INFO
2016-09-28 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2016-1939.nasl - Type : ACT_GATHER_INFO
2016-09-23 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2016-3617.nasl - Type : ACT_GATHER_INFO
2016-09-13 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2016-1076.nasl - Type : ACT_GATHER_INFO
2016-09-08 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2016-2245-1.nasl - Type : ACT_GATHER_INFO
2016-09-08 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2016-1815.nasl - Type : ACT_GATHER_INFO
2016-09-08 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2016-1814.nasl - Type : ACT_GATHER_INFO
2016-09-06 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-3659.nasl - Type : ACT_GATHER_INFO
2016-09-06 Name : The remote Debian host is missing a security update.
File : debian_DLA-609.nasl - Type : ACT_GATHER_INFO
2016-08-31 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3070-4.nasl - Type : ACT_GATHER_INFO
2016-08-31 Name : The remote Ubuntu host is missing a security-related patch.
File : ubuntu_USN-3070-3.nasl - Type : ACT_GATHER_INFO
2016-08-31 Name : The remote Ubuntu host is missing a security-related patch.
File : ubuntu_USN-3070-2.nasl - Type : ACT_GATHER_INFO
2016-08-30 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3072-1.nasl - Type : ACT_GATHER_INFO
2016-08-30 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3071-2.nasl - Type : ACT_GATHER_INFO
2016-08-30 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3071-1.nasl - Type : ACT_GATHER_INFO
2016-08-30 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3070-1.nasl - Type : ACT_GATHER_INFO
2016-08-29 Name : The remote device is missing a vendor-supplied security patch.
File : f5_bigip_SOL46514822.nasl - Type : ACT_GATHER_INFO
2016-08-25 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2016-1664.nasl - Type : ACT_GATHER_INFO
2016-08-24 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20160823_kernel_on_SL6_x.nasl - Type : ACT_GATHER_INFO
2016-08-24 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2016-1664.nasl - Type : ACT_GATHER_INFO
2016-08-24 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2016-1657.nasl - Type : ACT_GATHER_INFO
2016-08-24 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2016-1664.nasl - Type : ACT_GATHER_INFO
2016-08-22 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2016-1633.nasl - Type : ACT_GATHER_INFO
2016-08-22 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20160818_kernel_on_SL7_x.nasl - Type : ACT_GATHER_INFO
2016-08-19 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2016-1633.nasl - Type : ACT_GATHER_INFO
2016-08-19 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2016-1632.nasl - Type : ACT_GATHER_INFO
2016-08-19 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2016-1631.nasl - Type : ACT_GATHER_INFO
2016-08-19 Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2016-0098.nasl - Type : ACT_GATHER_INFO
2016-08-19 Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2016-0097.nasl - Type : ACT_GATHER_INFO
2016-08-19 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2016-1633.nasl - Type : ACT_GATHER_INFO
2016-08-16 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2016-3595.nasl - Type : ACT_GATHER_INFO
2016-08-16 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2016-3594.nasl - Type : ACT_GATHER_INFO
2016-08-02 Name : The remote Amazon Linux AMI host is missing a security update.
File : ala_ALAS-2016-726.nasl - Type : ACT_GATHER_INFO
2016-07-20 Name : The remote Fedora host is missing a security update.
File : fedora_2016-784d5526d8.nasl - Type : ACT_GATHER_INFO
2016-07-20 Name : The remote Fedora host is missing a security update.
File : fedora_2016-9a16b2e14e.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
Date Informations
2016-09-09 13:24:12
  • Multiple Updates
2016-09-06 13:23:33
  • First insertion