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Vulnerability of Prosody: privilege escalation via XMPP Address is_admin

Synthesis of the vulnerability 

An attacker can bypass restrictions via XMPP Address is_admin() of Prosody, in order to escalate his privileges.
Impacted systems: Debian.
Severity of this alert: 2/4.
Creation date: 03/02/2020.
Références of this alert: CVE-2020-8086, DSA-4612-1, VIGILANCE-VUL-31487.

Description of the vulnerability 

An attacker can bypass restrictions via XMPP Address is_admin() of Prosody, in order to escalate his privileges.
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This computer threat bulletin impacts software or systems such as Debian.

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

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

An attacker with a expert ability can exploit this computer vulnerability alert.

Solutions for this threat 

Debian 9/10: new prosody-modules packages.
New packages are available:
  Debian 9: prosody-modules 0.0~hg20170123.3ed504b944e5+dfsg-1+deb9u1
  Debian 10: prosody-modules 0.0~hg20190203.b54e98d5c4a1+dfsg-1+deb10u1
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