EulerOS 2.0 SP1 : kernel (EulerOS-SA-2017-1318)

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 flaw was found in the processing of incoming L2CAP
bluetooth commands. Uninitialized stack variables can
be sent to an attacker leaking data in kernel address
space.(CVE-2017-1000410)

- The assoc_array_insert_into_terminal_node function in
lib/assoc_array.c in the Linux kernel before 4.13.11
mishandles node splitting, which allows local users to
cause a denial of service (NULL pointer dereference and
panic) via a crafted application, as demonstrated by
the keyring key type, and key addition and link
creation operations.(CVE-2017-12193)

- The bio_map_user_iov and bio_unmap_user functions in
block/bio.c in the Linux kernel before 4.13.8 do
unbalanced refcounting when a SCSI I/O vector has small
consecutive buffers belonging to the same page. The
bio_add_pc_page function merges them into one, but the
page reference is never dropped. This causes a memory
leak and possible system lockup (exploitable against
the host OS by a guest OS user, if a SCSI disk is
passed through to a virtual machine) due to an
out-of-memory condition.(CVE-2017-12190)

- The tower_probe function in
drivers/usb/misc/legousbtower.c in the Linux kernel
before 4.8.1 allows local users (who are physically
proximate for inserting a crafted USB device) to gain
privileges by leveraging a write-what-where condition
that occurs after a race condition and a NULL pointer
dereference.(CVE-2017-15102)

- The sctp_do_peeloff function in net/sctp/socket.c in
the Linux kernel before 4.14 does not check whether the
intended netns is used in a peel-off action, which
allows local users to cause a denial of service
(use-after-free and system crash) or possibly have
unspecified other impact via crafted system
calls.(CVE-2017-15115)

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?0abf9880

Solution :

Update the affected kernel packages.

Risk factor :

High / CVSS Base Score : 7.2
(CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 5.6
(CVSS2#E:POC/RL:OF/RC:ND)
Public Exploit Available : true

Family: Huawei Local Security Checks

Nessus Plugin ID: 105046 ()

Bugtraq ID:

CVE ID: CVE-2017-1000410
CVE-2017-12190
CVE-2017-12193
CVE-2017-15102
CVE-2017-15115

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