Atualização de segurança
As unicas atualizações que os pacotes Debian Stable recebem são as de segurança, os programas raramente recebem atualizações de versão, a menos que as falhas de segurança exijam isso.
Ontem 01/10/2018 a comunidade Debian liberou 18 atualizações de correção para falhas do Linux, as quais você pode visualizar abaixo.
[SECURITY] [DSA 4308-1] linux security update
To: debian-security-announce@lists.debian.org
Subject: [SECURITY] [DSA 4308-1] linux security update
From: Salvatore Bonaccorso
Date: Mon, 01 Oct 2018 15:21:20 +0000
Message-id: <[🔎] E1g700e-0001qs-4j@seger.debian.org>
Reply-to: debian-security-announce-request@lists.debian.org
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Debian Security Advisory DSA-4308-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
October 01, 2018 https://www.debian.org/security/faq
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Package : linux
CVE ID : CVE-2018-6554 CVE-2018-6555 CVE-2018-7755 CVE-2018-9363
CVE-2018-9516 CVE-2018-10902 CVE-2018-10938 CVE-2018-13099
CVE-2018-14609 CVE-2018-14617 CVE-2018-14633 CVE-2018-14678
CVE-2018-14734 CVE-2018-15572 CVE-2018-15594 CVE-2018-16276
CVE-2018-16658 CVE-2018-17182
Several vulnerabilities have been discovered in the Linux kernel that
may lead to a privilege escalation, denial of service or information
leaks.
CVE-2018-6554
A memory leak in the irda_bind function in the irda subsystem was
discovered. A local user can take advantage of this flaw to cause a
denial of service (memory consumption).
CVE-2018-6555
A flaw was discovered in the irda_setsockopt function in the irda
subsystem, allowing a local user to cause a denial of service
(use-after-free and system crash).
CVE-2018-7755
Brian Belleville discovered a flaw in the fd_locked_ioctl function
in the floppy driver in the Linux kernel. The floppy driver copies a
kernel pointer to user memory in response to the FDGETPRM ioctl. A
local user with access to a floppy drive device can take advantage
of this flaw to discover the location kernel code and data.
CVE-2018-9363
It was discovered that the Bluetooth HIDP implementation did not
correctly check the length of received report messages. A paired
HIDP device could use this to cause a buffer overflow, leading to
denial of service (memory corruption or crash) or potentially
remote code execution.
CVE-2018-9516
It was discovered that the HID events interface in debugfs did not
correctly limit the length of copies to user buffers. A local
user with access to these files could use this to cause a
denial of service (memory corruption or crash) or possibly for
privilege escalation. However, by default debugfs is only
accessible by the root user.
CVE-2018-10902
It was discovered that the rawmidi kernel driver does not protect
against concurrent access which leads to a double-realloc (double
free) flaw. A local attacker can take advantage of this issue for
privilege escalation.
CVE-2018-10938
Yves Younan from Cisco reported that the Cipso IPv4 module did not
correctly check the length of IPv4 options. On custom kernels with
CONFIG_NETLABEL enabled, a remote attacker could use this to cause
a denial of service (hang).
CVE-2018-13099
Wen Xu from SSLab at Gatech reported a use-after-free bug in the
F2FS implementation. An attacker able to mount a crafted F2FS
volume could use this to cause a denial of service (crash or
memory corruption) or possibly for privilege escalation.
CVE-2018-14609
Wen Xu from SSLab at Gatech reported a potential null pointer
dereference in the F2FS implementation. An attacker able to mount
a crafted F2FS volume could use this to cause a denial of service
(crash).
CVE-2018-14617
Wen Xu from SSLab at Gatech reported a potential null pointer
dereference in the HFS+ implementation. An attacker able to mount
a crafted HFS+ volume could use this to cause a denial of service
(crash).
CVE-2018-14633
Vincent Pelletier discovered a stack-based buffer overflow flaw in
the chap_server_compute_md5() function in the iSCSI target code. An
unauthenticated remote attacker can take advantage of this flaw to
cause a denial of service or possibly to get a non-authorized access
to data exported by an iSCSI target.
CVE-2018-14678
M. Vefa Bicakci and Andy Lutomirski discovered a flaw in the
kernel exit code used on amd64 systems running as Xen PV guests.
A local user could use this to cause a denial of service (crash).
CVE-2018-14734
A use-after-free bug was discovered in the InfiniBand
communication manager. A local user could use this to cause a
denial of service (crash or memory corruption) or possible for
privilege escalation.
CVE-2018-15572
Esmaiel Mohammadian Koruyeh, Khaled Khasawneh, Chengyu Song, and
Nael Abu-Ghazaleh, from University of California, Riverside,
reported a variant of Spectre variant 2, dubbed SpectreRSB. A
local user may be able to use this to read sensitive information
from processes owned by other users.
CVE-2018-15594
Nadav Amit reported that some indirect function calls used in
paravirtualised guests were vulnerable to Spectre variant 2. A
local user may be able to use this to read sensitive information
from the kernel.
CVE-2018-16276
Jann Horn discovered that the yurex driver did not correctly limit
the length of copies to user buffers. A local user with access to
a yurex device node could use this to cause a denial of service
(memory corruption or crash) or possibly for privilege escalation.
CVE-2018-16658
It was discovered that the cdrom driver does not correctly
validate the parameter to the CDROM_DRIVE_STATUS ioctl. A user
with access to a cdrom device could use this to read sensitive
information from the kernel or to cause a denial of service
(crash).
CVE-2018-17182
Jann Horn discovered that the vmacache_flush_all function mishandles
sequence number overflows. A local user can take advantage of this
flaw to trigger a use-after-free, causing a denial of service
(crash or memory corruption) or privilege escalation.
For the stable distribution (stretch), these problems have been fixed in
version 4.9.110-3+deb9u5.
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
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Fonte
Todas para o Kernel 4.9.0-7.
Para atualizar o seu sistema de os comandos abaixo na sequencia.
Log como root.
Atualize a lista de pacotes.
Atualize o sistema operacional.
Sistema operacional Debian atualizado para o kernel Linux 4.9.8-8.
Todas para o Kernel 4.9.0-7.
Atualização
Para atualizar o seu sistema de os comandos abaixo na sequencia.
Log como root.
su
Atualize a lista de pacotes.
apt update
Atualize o sistema operacional.
apt full-upgradeReinicie o sistema para carregar o kernel atualizado.
reboot
Sistema operacional Debian atualizado para o kernel Linux 4.9.8-8.
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olá, seja bem vindo ao Linux Dicas e suporte !!