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SCIENTIFIC-LINUX-ERRATA  October 2017

SCIENTIFIC-LINUX-ERRATA October 2017

Subject:

Security ERRATA Important: kernel on SL7.x x86_64

From:

Pat Riehecky <[log in to unmask]>

Reply-To:

[log in to unmask]

Date:

Thu, 19 Oct 2017 19:07:16 -0000

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (96 lines)

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       SLSA-2017:2930-1
Issue Date:        2017-10-19
CVE Numbers:       CVE-2016-8399
                   CVE-2017-7541
                   CVE-2017-7184
                   CVE-2017-11176
                   CVE-2017-7542
                   CVE-2017-1000111
                   CVE-2017-1000112
                   CVE-2017-7558
                   CVE-2017-14106
--

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_notify function in the Linux kernel through 4.11.9 does not set
the sock pointer to NULL upon entry into the retry logic. During a user-
space close of a Netlink socket, it allows attackers to possibly cause a
situation where a value may be used after being freed (use-after-free)
which may lead to memory corruption or other unspecified other impact.
(CVE-2017-11176, Moderate)

* A divide-by-zero vulnerability was found in the __tcp_select_window
function in the Linux kernel. This can result in a kernel panic causing a
local denial of service. (CVE-2017-14106, Moderate)
--

SL7
  x86_64
    kernel-3.10.0-693.5.2.el7.x86_64.rpm
    kernel-debug-3.10.0-693.5.2.el7.x86_64.rpm
    kernel-debug-debuginfo-3.10.0-693.5.2.el7.x86_64.rpm
    kernel-debug-devel-3.10.0-693.5.2.el7.x86_64.rpm
    kernel-debuginfo-3.10.0-693.5.2.el7.x86_64.rpm
    kernel-debuginfo-common-x86_64-3.10.0-693.5.2.el7.x86_64.rpm
    kernel-devel-3.10.0-693.5.2.el7.x86_64.rpm
    kernel-headers-3.10.0-693.5.2.el7.x86_64.rpm
    kernel-tools-3.10.0-693.5.2.el7.x86_64.rpm
    kernel-tools-debuginfo-3.10.0-693.5.2.el7.x86_64.rpm
    kernel-tools-libs-3.10.0-693.5.2.el7.x86_64.rpm
    perf-3.10.0-693.5.2.el7.x86_64.rpm
    perf-debuginfo-3.10.0-693.5.2.el7.x86_64.rpm
    python-perf-3.10.0-693.5.2.el7.x86_64.rpm
    python-perf-debuginfo-3.10.0-693.5.2.el7.x86_64.rpm
    kernel-tools-libs-devel-3.10.0-693.5.2.el7.x86_64.rpm
  noarch
    kernel-abi-whitelists-3.10.0-693.5.2.el7.noarch.rpm
    kernel-doc-3.10.0-693.5.2.el7.noarch.rpm

- Scientific Linux Development Team

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