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From: <>
To: debian-security-announce@lists.debian.org
Subject: [SECURITY] [DSA 4495-1] linux security update
-------------------------------------------------------------------------
Debian Security Advisory DSA-4495-1 security@debian.org
https://www.debian.org/security/
August 10, 2019 https://www.debian.org/security/faq
-------------------------------------------------------------------------
Package : linux
CVE ID : CVE-2018-20836 CVE-2019-1125 CVE-2019-1999 CVE-2019-10207
CVE-2019-10638 CVE-2019-12817 CVE-2019-12984 CVE-2019-13233
CVE-2019-13631 CVE-2019-13648 CVE-2019-14283 CVE-2019-14284
Brief introduction
CVE-2018-20836
Description
CVE-2019-1125
It was discovered that most x86 processors could speculatively
skip a conditional SWAPGS instruction used when entering the
kernel from user mode, and/or could speculatively execute it when
it should be skipped. This is a subtype of Spectre variant 1,
which could allow local users to obtain sensitive information from
the kernel or other processes. Systems using an i386 kernel are
not affected as the kernel does not use SWAPGS.
CVE-2019-1999
A race condition was discovered in the Android binder driver,
which could lead to a use-after-free. If this driver is loaded, a
local user might be able to use this for denial-of-service
(memory corruption) or for privilege escalation.
CVE-2019-10207
The syzkaller tool found a potential null dereference in various
drivers for UART-attached Bluetooth adapters. A local user with
access to a pty device or other suitable tty device could use this
for denial-of-service (oops/BUG).
CVE-2019-10638
Amit Klein and Benny Pinkas discovered that the generation of IP
packet IDs used a weak hash function, "jhash". This could enable
tracking individual computers as they communicate with different
remote servers and from different networks. The "siphash"
function is now used instead.
CVE-2019-12817
It was discovered that on the PowerPC architecture, the hash page
table (HPT) code did not correctly handle fork() in a process with
memory mapped at addresses above 512 TiB. This could lead to a
use-after-free in the kernel, or unintended sharing of memory
between user processes. A local user could use this for privilege
escalation. Systems using the radix MMU, or a custom kernel with
a 4 KiB page size, are not affected.
CVE-2019-12984
Description
CVE-2019-13233
Description
CVE-2019-13631
Description
CVE-2019-13648
Description
CVE-2019-14283
Description
CVE-2019-14284
Description
For the stable distribution (buster), these problems have been fixed in
version 4.19.37-5+deb10u2.
For the oldstable distribution (stretch), these problems will be fixed
soon.
We recommend that you upgrade your linux packages.
For the detailed security status of linux please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/linux
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org
|
