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Alerts This Week
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Red Hat: RHSA-2016:0045-1 Important: Kernel Denial of Service Issues

red hat
Calendar Grey January 19, 2016
Scroller Redhat
Significant kernel security patch from Red Hat addresses vulnerabilities in UDP, mitigating potential DoS threats and bolstering overall system defense.
Updated kernel packages that fix two security issues are now available for Red Hat Enterprise Linux 5

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

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

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.
* Two flaws were found in the way the Linux kernel's networking implementation handled UDP packets with incorrect checksum values. A remote attacker could potentially use these flaws to trigger an infinite loop in the kernel, resulting in a denial of service on the system, or cause a denial of service in applications using the edge triggered epoll functionality. (CVE-2015-5364, CVE-2015-5366, Important)
All kernel users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.

Topics%20covered

Topics Covered

security advisory Red Hat DoS kernel UDP important update networking issues

References

https://access.redhat.com/security/cve/CVE-2015-5364 https://access.redhat.com/security/cve/CVE-2015-5366 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Desktop (v. 5 client):
Source: kernel-2.6.18-408.el5.src.rpm
i386: kernel-2.6.18-408.el5.i686.rpm kernel-PAE-2.6.18-408.el5.i686.rpm kernel-PAE-debuginfo-2.6.18-408.el5.i686.rpm kernel-PAE-devel-2.6.18-408.el5.i686.rpm kernel-debug-2.6.18-408.el5.i686.rpm kernel-debug-debuginfo-2.6.18-408.el5.i686.rpm kernel-debug-devel-2.6.18-408.el5.i686.rpm kernel-debuginfo-2.6.18-408.el5.i686.rpm kernel-debuginfo-common-2.6.18-408.el5.i686.rpm kernel-devel-2.6.18-408.el5.i686.rpm kernel-headers-2.6.18-408.el5.i386.rpm kernel-xen-2.6.18-408.el5.i686.rpm kernel-xen-debuginfo-2.6.18-408.el5.i686.rpm kernel-xen-devel-2.6.18-408.el5.i686.rpm
noarch: kernel-doc-2.6.18-408.el5.noarch.rpm
x86_64: kernel-2.6.18-408.el5.x86_64.rpm kernel-debug-2.6.18-408.el5.x86_64.rpm kernel-debug-debuginfo-2.6.18-408.el5.x86_64.rpm kernel-debug-devel-2.6.18-408.el5.x86_64.rpm kernel-debuginfo-2.6.18-408.el5.x86_64.rpm kernel-debuginfo-common-2.6.18-408.el5.x86_64.rpm kernel-devel-2.6.18-408.el5.x86_64.rpm kernel-headers-2.6.18-408.el5.x86_64.rpm kernel-xen-2.6.18-408.el5.x86_64.rpm kernel-xen-debuginfo-2.6.18-408.el5.x86_64.rpm kernel-xen-devel-2.6.18-408.el5.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source: kernel-2.6.18-408.el5.src.rpm
i386:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2016:0045-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:0045.html
Issue date: 2016-01-19

Topic

Updated kernel packages that fix two security issues are now available forRed Hat Enterprise Linux 5.Red Hat Product Security has rated this update as having Important securityimpact. Common Vulnerability Scoring System (CVSS) base scores, which givedetailed severity ratings, are available for each vulnerability from theCVE links in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat DoS kernel UDP important update networking issues

Relevant Releases Architectures

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, noarch, ppc, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, noarch, x86_64

Bugs Fixed

1239029 - CVE-2015-5366 CVE-2015-5364 kernel: net: incorrect processing of checksums in UDP implementation

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