| Descripción: | Summary:
The remote host is missing an update for the 'kernel'
package(s) announced via the referenced advisory.
Vulnerability Insight:
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)
* It was found that the Linux kernel's Datagram Congestion Control Protocol
(DCCP) implementation used the IPv4-only inet_sk_rebuild_header() function
for both IPv4 and IPv6 DCCP connections, which could result in memory
corruptions. A remote attacker could use this flaw to crash the system.
(CVE-2017-2634, Moderate)
Important: This update disables the DCCP kernel module at load time by
using the kernel module blacklist method. The module is disabled in an
attempt to reduce further exposure to additional issues. Please see Red Hat
Bugzilla (BZ#1425177) for additional information.
Red Hat would like to thank Andrey Konovalov (Google) for reporting
CVE-2017-6074. The CVE-2017-2634 issue was discovered by Wade Mealing (Red
Hat Product Security).
Affected Software/OS:
kernel on Red Hat Enterprise Linux (v. 5 server)
Solution:
Please Install the Updated Packages.
CVSS Score:
7.8
CVSS Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:C
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