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Vulnerability of Linux kernel: integer overflow via cpia2_remap_buffer

Synthesis of the vulnerability 

An attacker can trigger an integer overflow via cpia2_remap_buffer() of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
Impacted software: Linux, SUSE Linux Enterprise Desktop, SLES.
Severity of this computer vulnerability: 2/4.
Creation date: 26/11/2019.
Références of this announce: CERTFR-2020-AVI-260, CERTFR-2020-AVI-318, CVE-2019-18675, SUSE-SU-2020:1255-1, SUSE-SU-2020:14354-1, VIGILANCE-VUL-30982.

Description of the vulnerability 

An attacker can trigger an integer overflow via cpia2_remap_buffer() of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
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This weakness note impacts software or systems such as Linux, SUSE Linux Enterprise Desktop, SLES.

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

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

A proof of concept or an attack tool is available, so your teams have to process this alert. An attacker with a technician ability can exploit this computer weakness.

Solutions for this threat 

Linux kernel: patch for cpia2_remap_buffer.
A patch is indicated in information sources.

SUSE LE 11 SP4: new kernel packages.
New packages are available:
  SUSE LE 11 SP4: kernel 3.0.101-108.111.1

SUSE LE 12 SP2: new kernel packages.
New packages are available:
  SUSE LE 12 SP2: kernel-default 4.4.121-92.129.1
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