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Vigil@nce - Debian avahi: privilege escalation via avahi-daemon-check-dns.sh
April 2021 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer/Computer-vulnerabilities-watch-and-alert
SYNTHESIS OF THE VULNERABILITY
Impacted products: Debian, openSUSE Leap, SUSE Linux Enterprise
Desktop, SLES.
Severity: 2/4.
Consequences: privileged access/rights, data reading, data
creation/edition.
Provenance: user shell.
Confidence: confirmed by the editor (5/5).
Creation date: 23/02/2021.
DESCRIPTION OF THE VULNERABILITY
An attacker can bypass restrictions via avahi-daemon-check-dns.sh
of Debian avahi, in order to escalate his privileges.
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