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Vulnerability of Linux kernel: privilege escalation via net/nfc/rawsock.c

Synthesis of the vulnerability 

An attacker can bypass restrictions via net/nfc/rawsock.c of the Linux kernel, in order to escalate his privileges.
Impacted software: Debian, Linux, openSUSE Leap, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this computer vulnerability: 2/4.
Creation date: 28/09/2020.
Références of this announce: CERTFR-2020-AVI-614, CERTFR-2020-AVI-625, CERTFR-2020-AVI-642, CERTFR-2020-AVI-672, CERTFR-2020-AVI-678, CERTFR-2020-AVI-699, CERTFR-2020-AVI-764, CERTFR-2020-AVI-776, CERTFR-2020-AVI-784, CVE-2020-26088, DLA-2385-1, DLA-2420-1, DLA-2420-2, openSUSE-SU-2020:1586-1, openSUSE-SU-2020:1655-1, openSUSE-SU-2021:0242-1, SSA:2020-295-01, SUSE-SU-2020:2879-1, SUSE-SU-2020:2904-1, SUSE-SU-2020:2905-1, SUSE-SU-2020:2906-1, SUSE-SU-2020:2907-1, SUSE-SU-2020:2908-1, SUSE-SU-2020:2999-1, SUSE-SU-2020:3014-1, SUSE-SU-2020:3501-1, SUSE-SU-2020:3503-1, SUSE-SU-2020:3532-1, SUSE-SU-2020:3544-1, USN-4578-1, VIGILANCE-VUL-33442.

Description of the vulnerability 

An attacker can bypass restrictions via net/nfc/rawsock.c of the Linux kernel, in order to escalate his privileges.
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This computer weakness bulletin impacts software or systems such as Debian, Linux, openSUSE Leap, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this computer threat announce is medium.

The trust level is of type confirmed by the editor, with an origin of user shell.

An attacker with a expert ability can exploit this threat announce.

Solutions for this threat 

Linux kernel: version 5.8.2.
The version 5.8.2 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 5.7.16.
The version 5.7.16 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 5.4.59.
The version 5.4.59 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 4.19.140.
The version 4.19.140 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.9.233.
The version 4.9.233 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.4.233.
The version 4.4.233 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: patch for net/nfc/rawsock.c.
A patch is indicated in information sources.

Debian 9: new linux-4.19 packages (28/09/2020).
New packages are available:
  Debian 9: linux-4.19 4.19.146-1~deb9u1

Debian 9: new linux packages.
New packages are available:
  Debian 9: linux 4.9.240-2

openSUSE Leap 15.1: new kernel packages (12/10/2020).
New packages are available:
  openSUSE Leap 15.1: kernel 4.12.14-lp151.28.71.1

openSUSE Leap 15.2: new kernel packages (02/10/2020).
New packages are available:
  openSUSE Leap 15.2: kernel 5.3.18-lp152.44.1

openSUSE Leap 15.2: new kernel-rt packages.
New packages are available:
  openSUSE Leap 15.2: kernel-rt 5.3.18-lp152.3.5.1

Slackware 14.2: new kernel packages (22/10/2020).
New packages are available:
  Slackware 14.2: kernel 4.4.240-i586-1

SUSE LE 12 SP2: new kernel-default packages.
New packages are available:
  SUSE LE 12 SP2: kernel-default 4.4.121-92.146.1
  SUSE LE 12 SP2: kernel-default 4.4.121-92.146.1

SUSE LE 12 SP3: new kernel-default packages.
New packages are available:
  SUSE LE 12 SP3: kernel-default 4.4.180-94.135.1

SUSE LE 12 SP4: new kernel-default packages.
New packages are available:
  SUSE LE 12 SP4: kernel-default 4.12.14-95.65.1

SUSE LE 12 SP5: new kernel packages (13/10/2020).
New packages are available:
  SUSE LE 12 SP5: kernel 4.12.14-122.41.1

SUSE LE 12 SP5: new kerne-rt packages.
New packages are available:
  SUSE LE 12 SP5: kernel-rt 4.12.14-10.19.1

SUSE LE 15: new kernel packages.
New packages are available:
  SUSE LE 15 RTM: kernel-default-livepatch 4.12.14-150.63.1, kernel-livepatch 4_12_14-150_63-default-1-1.5.1

SUSE LE 15 SP1: new kernel-azure packages (13/10/2020).
New packages are available:
  SUSE LE 15 SP1: kernel-azure 4.12.14-8.47.1

SUSE LE 15 SP1: new kernel packages.
New packages are available:
  SUSE LE 15 SP1: kernel 4.12.14-197.61.1

SUSE LE 15 SP1: new kernel-rt packages (23/10/2020).
New packages are available:
  SUSE LE 15 SP1: kernel-rt 4.12.14-14.36.1

SUSE LE 15 SP2: new kernel-azure packages (13/10/2020).
New packages are available:
  SUSE LE 15 SP2: kernel-azure 5.3.18-18.21.1

SUSE LE 15 SP2: new kernel packages (09/10/2020).
New packages are available:
  SUSE LE 15 SP2: kernel 5.3.18-24.24.1

Ubuntu: new linux-image-4.15.0 packages.
New packages are available:
  Ubuntu 14.04 ESM: linux-image-azure 4.15.0.1098.74
  Ubuntu 16.04 LTS: linux-image-generic-hwe-16.04 4.15.0.120.121
  Ubuntu 18.04 LTS: linux-image-generic 4.15.0.121.108

Wind River Linux: version 10.18.44.20.
The version 10.18.44.20 is fixed:
  https://support2.windriver.com/index.php?page=cve&on=list&show=50&product_id=1&product_version%5B0%5D=23&id_status%5B0%5D=4&cve_id_filter=&s=&submit=&order_by=cve_modified_date&order_way=desc#list
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