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Test ID:
Category:Red Hat Local Security Checks
Title:RedHat Update for kernel RHSA-2015:1778-01
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.

* A flaw was found in the kernel's implementation of the Berkeley Packet
Filter (BPF). A local attacker could craft BPF code to crash the system by
creating a situation in which the JIT compiler would fail to correctly
optimize the JIT image on the last pass. This would lead to the CPU
executing instructions that were not part of the JIT code. (CVE-2015-4700,

* 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)

* A flaw was found in the way the Linux kernel's ext4 file system handled
the 'page size block size' condition when the fallocate zero range
functionality was used. A local attacker could use this flaw to crash the
system. (CVE-2015-0275, Moderate)

* It was found that the Linux kernel's keyring implementation would leak
memory when adding a key to a keyring via the add_key() function. A local
attacker could use this flaw to exhaust all available memory on the system.
(CVE-2015-1333, Moderate)

* A race condition flaw was found in the way the Linux kernel's SCTP
implementation handled Address Configuration lists when performing Address
Configuration Change (ASCONF). A local attacker could use this flaw to
crash the system via a race condition triggered by setting certain ASCONF
options on a socket. (CVE-2015-3212, Moderate)

* An information leak flaw was found in the way the Linux kernel's Virtual
Dynamic Shared Object (vDSO) implementation performed address
randomization. A local, unprivileged user could use this flaw to leak
kernel memory addresses to user-space. (CVE-2014-9585, Low)

Red Hat would like to thank Daniel Borkmann for reporting CVE-2015-4700,
and Canonical for reporting the CVE-2015-1333 issue. The CVE-2015-0275
issue was discovered by Xiong Zhou of Red Hat, and the CVE-2015-3212 issue
was discovered by Ji Jianwen of Red Hat Engineering.

This update also fixes several bugs. Refer to the linked Knowledgebase
article for further information.

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.

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-2014-9585
BugTraq ID: 71990
Debian Security Information: DSA-3170 (Google Search);a=commit;h=bc3b94c31d65e761ddfe150d02932c65971b74e2
RedHat Security Advisories: RHSA-2015:1081
RedHat Security Advisories: RHSA-2015:1778
RedHat Security Advisories: RHSA-2015:1787
SuSE Security Announcement: SUSE-SU-2015:0178 (Google Search)
SuSE Security Announcement: SUSE-SU-2015:0481 (Google Search)
SuSE Security Announcement: SUSE-SU-2015:0652 (Google Search)
SuSE Security Announcement: SUSE-SU-2015:0736 (Google Search)
SuSE Security Announcement: openSUSE-SU-2015:0566 (Google Search)
SuSE Security Announcement: openSUSE-SU-2015:0714 (Google Search)
Common Vulnerability Exposure (CVE) ID: CVE-2015-0275
BugTraq ID: 75139
Common Vulnerability Exposure (CVE) ID: CVE-2015-1333
BugTraq ID: 76050
Debian Security Information: DSA-3329 (Google Search)
Common Vulnerability Exposure (CVE) ID: CVE-2015-3212
BugTraq ID: 76082
SuSE Security Announcement: SUSE-SU-2015:1324 (Google Search)
SuSE Security Announcement: openSUSE-SU-2015:1382 (Google Search)
Common Vulnerability Exposure (CVE) ID: CVE-2015-4700
BugTraq ID: 75356
SuSE Security Announcement: SUSE-SU-2015:1224 (Google Search)
SuSE Security Announcement: SUSE-SU-2015:1478 (Google Search)
SuSE Security Announcement: SUSE-SU-2015:1487 (Google Search)
SuSE Security Announcement: SUSE-SU-2015:1488 (Google Search)
SuSE Security Announcement: SUSE-SU-2015:1489 (Google Search)
SuSE Security Announcement: SUSE-SU-2015:1490 (Google Search)
SuSE Security Announcement: SUSE-SU-2015:1491 (Google Search)
SuSE Security Announcement: SUSE-SU-2015:1592 (Google Search)
SuSE Security Announcement: SUSE-SU-2015:1611 (Google Search)
Common Vulnerability Exposure (CVE) ID: CVE-2015-5364
BugTraq ID: 75510
Debian Security Information: DSA-3313 (Google Search)
RedHat Security Advisories: RHSA-2015:1623
RedHat Security Advisories: RHSA-2016:0045
RedHat Security Advisories: RHSA-2016:1096
RedHat Security Advisories: RHSA-2016:1100
RedHat Security Advisories: RHSA-2016:1225
Common Vulnerability Exposure (CVE) ID: CVE-2015-5366
CopyrightCopyright (C) 2015 Greenbone Networks GmbH

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