EulerOS 2.0 SP2 : kernel (EulerOS-SA-2017-1056)

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

The remote EulerOS host is missing multiple security updates.

Description :

According to the versions of the kernel packages installed, the
EulerOS installation on the remote host is affected by the following
vulnerabilities :

- 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)

- The tcp_splice_read function in net/ipv4/tcp.c in the
Linux kernel before 4.9.11 allows remote attackers to
cause a denial of service (infinite loop and soft
lockup) via vectors involving a TCP packet with the URG
flag.(CVE-2017-6214)

- The do_shmat function in ipc/shm.c in the Linux kernel
through 4.9.12 does not restrict the address calculated
by a certain rounding operation, which allows local
users to map page zero, and consequently bypass a
protection mechanism that exists for the mmap system
call, by making crafted shmget and shmat system calls
in a privileged context.(CVE-2017-5669)

- The hashbin_delete function in net/irda/irqueue.c in
the Linux kernel before 4.9.13 improperly manages lock
dropping, which allows local users to cause a denial of
service (deadlock) via crafted operations on IrDA
devices.(CVE-2017-6348)

- Race condition in kernel/events/core.c in the Linux
kernel before 4.9.7 allows local users to gain
privileges via a crafted application that makes
concurrent perf_event_open system calls for moving a
software group into a hardware context.(CVE-2017-6001)

Note that Tenable Network Security has extracted the preceding
description block directly from the EulerOS security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.

See also :

http://www.nessus.org/u?a589f91d

Solution :

Update the affected kernel packages.

Risk factor :

High / CVSS Base Score : 7.6
(CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 6.0
(CVSS2#E:POC/RL:OF/RC:C)
Public Exploit Available : true

Family: Huawei Local Security Checks

Nessus Plugin ID: 99901 ()

Bugtraq ID:

CVE ID: CVE-2017-5669
CVE-2017-6001
CVE-2017-6074
CVE-2017-6214
CVE-2017-6348

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