Overly broad permissions can turn one compromised account into a much larger security problem. Learn how to reduce unnecessary access, review privileges, and apply least privilege across modern Linux systems. Review Linux Privileges×

Alerts This Week
Warning Icon 1 542
Alerts This Week
Warning Icon 1 542

Red Hat 7 RHSA-2017:0294-01 Critical: Kernel Privilege Escalation

red hat
Calendar Grey February 22, 2017
Scroller Redhat
A significant kernel update for Red Hat Enterprise Linux 7 has launched, fixing critical security vulnerabilities. Users must adhere to the update guidelines for proper implementation
An update for kernel is now available for Red Hat Enterprise Linux 7

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.

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* A use-after-free flaw was found in the way the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation freed SKB (socket buffer) resources for a DCCP_PKT_REQUEST packet when the IPV6_RECVPKTINFO option is set on the socket. A local, unprivileged user could use this flaw to alter the kernel memory, allowing them to escalate their privileges on the system. (CVE-2017-6074, Important)

Topics%20covered

Topics Covered

security advisory Red Hat privilege escalation kernel system update important security DCCP flaw

References

https://access.redhat.com/security/cve/CVE-2017-6074 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: kernel-3.10.0-514.6.2.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-514.6.2.el7.noarch.rpm kernel-doc-3.10.0-514.6.2.el7.noarch.rpm
x86_64: kernel-3.10.0-514.6.2.el7.x86_64.rpm kernel-debug-3.10.0-514.6.2.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-514.6.2.el7.x86_64.rpm kernel-debug-devel-3.10.0-514.6.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.6.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.6.2.el7.x86_64.rpm kernel-devel-3.10.0-514.6.2.el7.x86_64.rpm kernel-headers-3.10.0-514.6.2.el7.x86_64.rpm kernel-tools-3.10.0-514.6.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.6.2.el7.x86_64.rpm kernel-tools-libs-3.10.0-514.6.2.el7.x86_64.rpm perf-3.10.0-514.6.2.el7.x86_64.rpm perf-debuginfo-3.10.0-514.6.2.el7.x86_64.rpm python-perf-3.10.0-514.6.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.6.2.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: kernel-debug-debuginfo-3.10.0-514.6.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.6.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.6.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.6.2.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-514.6.2.el7.x86_64.rpm perf-debuginfo-3.10.0-514.6.2.el7.x86_64.rpm

Read the Full Advisory


Severity
critical
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2017:0294-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:0294.html
Issue date: 2017-02-22

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat privilege escalation kernel system update important security DCCP flaw

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

1423071 - CVE-2017-6074 kernel: use after free in dccp protocol

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.