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Test ID:
Category:Red Hat Local Security Checks
Title:RedHat Update for kernel RHSA-2017:2930-01
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):

* Out-of-bounds kernel heap access vulnerability was found in xfrm,
kernel's IP framework for transforming packets. An error dealing with
netlink messages from an unprivileged user leads to arbitrary read/write
and privilege escalation. (CVE-2017-7184, Important)

* A race condition issue leading to a use-after-free flaw was found in the
way the raw packet sockets are implemented in the Linux kernel networking
subsystem handling synchronization. A local user able to open a raw packet
socket (requires the CAP_NET_RAW capability) could use this flaw to elevate
their privileges on the system. (CVE-2017-1000111, Important)

* An exploitable memory corruption flaw was found in the Linux kernel. The
append path can be erroneously switched from UFO to non-UFO in
ip_ufo_append_data() when building an UFO packet with MSG_MORE option. If
unprivileged user namespaces are available, this flaw can be exploited to
gain root privileges. (CVE-2017-1000112, Important)

* A flaw was found in the Linux networking subsystem where a local attacker
with CAP_NET_ADMIN capabilities could cause an out-of-bounds memory access
by creating a smaller-than-expected ICMP header and sending to its
destination via sendto(). (CVE-2016-8399, Moderate)

* Kernel memory corruption due to a buffer overflow was found in
brcmf_cfg80211_mgmt_tx() function in Linux kernels from v3.9-rc1 to
v4.13-rc1. The vulnerability can be triggered by sending a crafted
NL80211_CMD_FRAME packet via netlink. This flaw is unlikely to be triggered
remotely as certain userspace code is needed for this. An unprivileged
local user could use this flaw to induce kernel memory corruption on the
system, leading to a crash. Due to the nature of the flaw, privilege
escalation cannot be fully ruled out, although it is unlikely.
(CVE-2017-7541, Moderate)

* An integer overflow vulnerability in ip6_find_1stfragopt() function was
found. A local attacker that has privileges (of CAP_NET_RAW) to open raw
socket can cause an infinite loop inside the ip6_find_1stfragopt()
function. (CVE-2017-7542, Moderate)

* A kernel data leak due to an out-of-bound read was found in the Linux
kernel in inet_diag_msg_sctp{, l}addr_fill() and sctp_get_sctp_info()
functions present since version 4.7-rc1 through version 4.13. A data leak
happens when these functions fill in sockaddr data structures used to
export socket's diagnostic information. As a result, up to 100 bytes of the
slab data could be leaked to a userspace. (CVE-2017-7558, Moderate)

* The mq_n ...

Description truncated, please see the referenced URL(s) for more information.

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-2016-8399
BugTraq ID: 94708
RedHat Security Advisories: RHSA-2017:0817
RedHat Security Advisories: RHSA-2017:0869
RedHat Security Advisories: RHSA-2017:2930
RedHat Security Advisories: RHSA-2017:2931
Common Vulnerability Exposure (CVE) ID: CVE-2017-7184
BugTraq ID: 97018
RedHat Security Advisories: RHSA-2017:2918
RedHat Security Advisories: RHSA-2019:4159
Common Vulnerability Exposure (CVE) ID: CVE-2017-7541
BugTraq ID: 99955
Debian Security Information: DSA-3927 (Google Search)
Debian Security Information: DSA-3945 (Google Search)
RedHat Security Advisories: RHSA-2017:2863
Common Vulnerability Exposure (CVE) ID: CVE-2017-7542
BugTraq ID: 99953
RedHat Security Advisories: RHSA-2018:0169
Common Vulnerability Exposure (CVE) ID: CVE-2017-7558
BugTraq ID: 100466
Debian Security Information: DSA-3981 (Google Search)
CopyrightCopyright (C) 2017 Greenbone Networks GmbH

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