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Vulnerability of libmspack: information disclosure via chmd_read_headers

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via chmd_read_headers() of libmspack, in order to obtain sensitive information.
Impacted products: Debian, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this bulletin: 2/4.
Creation date: 19/07/2019.
Références of this threat: CVE-2019-1010305, DLA-1895-1, openSUSE-SU-2020:0746-1, RHSA-2020:1686-01, RHSA-2020:3848-01, SUSE-SU-2020:2711-1, USN-4066-1, USN-4066-2, VIGILANCE-VUL-29829.

Description of the vulnerability 

An attacker can bypass access restrictions to data via chmd_read_headers() of libmspack, in order to obtain sensitive information.
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This weakness announce impacts software or systems such as Debian, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this vulnerability alert is medium.

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

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

Solutions for this threat 

Debian 8: new libmspack packages.
New packages are available:
  Debian 8: libmspack 0.5-1+deb8u4

openSUSE Leap 15.1: new libmspack packages.
New packages are available:
  openSUSE Leap 15.1: libmspack0 0.6-lp151.4.3.1

RHEL 7.8: new libmspack packages.
New packages are available:
  RHEL 7.0-7.8: libmspack 0.5-0.8.alpha.el7

RHEL 8: new libmspack packages.
New packages are available:
  RHEL 8.0-8.1: libmspack 0.7-0.3.alpha.el8.4

SUSE LE 12 SP5: new libmspack packages.
New packages are available:
  SUSE LE 12 SP5: libmspack0 0.4-15.7.1

Ubuntu: new clamav packages.
New packages are available:
  Ubuntu 14.04 ESM: clamav 0.100.3+dfsg-0ubuntu0.14.04.1+esm1
  Ubuntu 12.04 ESM: clamav 0.100.3+dfsg-1ubuntu0.12.04.2

Ubuntu: new libmspack0 packages.
New packages are available:
  Ubuntu 18.04 LTS: libmspack0 0.6-3ubuntu0.3
  Ubuntu 16.04 LTS: libmspack0 0.5-1ubuntu0.16.04.4
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