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Test ID:
Category:Red Hat Local Security Checks
Title:RedHat Update for kernel RHSA-2017:1308-01
Summary:The remote host is missing an update for the 'kernel'; package(s) announced via the referenced advisory.
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):

* It was found that the packet_set_ring() function of the Linux kernel's
networking implementation did not properly validate certain block-size
data. A local attacker with CAP_NET_RAW capability could use this flaw to
trigger a buffer overflow, resulting in the crash of the system. Due to the
nature of the flaw, privilege escalation cannot be fully ruled out.
(CVE-2017-7308, Important)

* Mounting a crafted EXT4 image read-only leads to an attacker controlled
memory corruption and SLAB-Out-of-Bounds reads. (CVE-2016-10208, Moderate)

* A flaw was found in the Linux kernel's implementation of seq_file where a
local attacker could manipulate memory in the put() function pointer. This
could lead to memory corruption and possible privileged escalation.
(CVE-2016-7910, Moderate)

* A vulnerability was found in the Linux kernel. An unprivileged local user
could trigger oops in shash_async_export() by attempting to force the
in-kernel hashing algorithms into decrypting an empty data set.
(CVE-2016-8646, Moderate)

* It was reported that with Linux kernel, earlier than version v4.10-rc8,
an application may trigger a BUG_ON in sctp_wait_for_sndbuf if the socket
tx buffer is full, a thread is waiting on it to queue more data, and
meanwhile another thread peels off the association being used by the first
thread. (CVE-2017-5986, Moderate)

Red Hat would like to thank Igor Redko (Virtuozzo kernel team) for
reporting CVE-2016-8646.

Additional Changes:

This update also fixes several bugs and adds various enhancements.
Documentation for these changes is available from the Technical Notes
document linked to in the References section.

Affected Software/OS:
kernel on Red Hat Enterprise Linux Server (v. 7)

Please Install the Updated Packages.

CVSS Score:

CVSS Vector:

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2016-7910
BugTraq ID: 94135
RedHat Security Advisories: RHSA-2017:0892
RedHat Security Advisories: RHSA-2017:1297
RedHat Security Advisories: RHSA-2017:1298
RedHat Security Advisories: RHSA-2017:1308
Common Vulnerability Exposure (CVE) ID: CVE-2016-8646
BugTraq ID: 94309
Common Vulnerability Exposure (CVE) ID: CVE-2017-5986
BugTraq ID: 96222
Debian Security Information: DSA-3804 (Google Search)
Common Vulnerability Exposure (CVE) ID: CVE-2017-7308
BugTraq ID: 97234
RedHat Security Advisories: RHSA-2018:1854
CopyrightCopyright (C) 2017 Greenbone Networks GmbH

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