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Vulnerability of snapd: privilege escalation via cloud-init user-data/meta-data

Synthesis of the vulnerability 

An attacker can bypass restrictions via cloud-init user-data/meta-data of snapd, in order to escalate his privileges.
Impacted systems: Fedora, Ubuntu.
Severity of this alert: 2/4.
Creation date: 16/07/2020.
Références of this alert: CVE-2020-11933, FEDORA-2020-7685deba9b, FEDORA-2020-ccb155ea2c, USN-4424-1, VIGILANCE-VUL-32843.

Description of the vulnerability 

An attacker can bypass restrictions via cloud-init user-data/meta-data of snapd, in order to escalate his privileges.
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This vulnerability announce impacts software or systems such as Fedora, Ubuntu.

Our Vigil@nce team determined that the severity of this cybersecurity threat 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 computer threat bulletin.

Solutions for this threat 

Fedora 31-32: new snapd packages.
New packages are available:
  Fedora 31: snapd 2.45.2-1.fc31
  Fedora 32: snapd 2.45.2-1.fc32

Ubuntu: new snapd packages.
New packages are available:
  Ubuntu 20.04 LTS: snapd 2.45.1+20.04.2
  Ubuntu 19.10: snapd 2.45.1+19.10.2
  Ubuntu 18.04 LTS: snapd 2.45.1+18.04.2
  Ubuntu 16.04 LTS: snapd 2.45.1ubuntu0.2
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