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Vulnerability of storeBackup: file corruption via /tmp/storeBackup.lock

Synthesis of the vulnerability 

A local attacker can create a symbolic link named /tmp/storeBackup.lock, in order to alter the pointed file, with privileges of storeBackup.
Vulnerable products: Debian, openSUSE Leap, SLES, Ubuntu.
Severity of this weakness: 1/4.
Creation date: 29/01/2020.
Références of this bulletin: CVE-2020-7040, DLA-2095-1, openSUSE-SU-2020:0119-1, USN-4508-1, VIGILANCE-VUL-31446.

Description of the vulnerability 

A local attacker can create a symbolic link named /tmp/storeBackup.lock, in order to alter the pointed file, with privileges of storeBackup.
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This security threat impacts software or systems such as Debian, openSUSE Leap, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this computer weakness note is low.

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 computer threat alert.

Solutions for this threat 

Debian 8: new storebackup packages.
New packages are available:
  Debian 8: storebackup 3.2.1-1+deb8u1

openSUSE, SUSE LE: new storeBackup packages.
New packages are available:
  openSUSE Leap 15.1: storeBackup 3.5-lp151.5.3.1
  SUSE LE 15 SP1: storeBackup 3.5-bp151.4.3.1
  SUSE LE 15 RTM: storeBackup 3.5-bp150.3.3.1

Ubuntu: new storebackup packages.
New packages are available:
  Ubuntu 20.04 LTS: storebackup 3.2.1-1+deb8u1build0.20.04.1
  Ubuntu 18.04 LTS: storebackup 3.2.1-1+deb8u1build0.18.04.1
  Ubuntu 16.04 LTS: storebackup 3.2.1-1+deb8u1build0.16.04.1
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