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Vulnerability of Sudo: privilege escalation via Nonexistent User

Synthesis of the vulnerability 

An attacker can bypass restrictions via Nonexistent User of Sudo, in order to escalate his privileges.
Impacted systems: Cyrus SASL.
Severity of this alert: 1/4.
Creation date: 20/12/2019.
Références of this alert: CVE-2019-19232, VIGILANCE-VUL-31205.

Description of the vulnerability 

An attacker can bypass restrictions via Nonexistent User of Sudo, in order to escalate his privileges.
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This threat note impacts software or systems such as Cyrus SASL.

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

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

An attacker with a expert ability can exploit this vulnerability note.

Solutions for this threat 

Cyrus SASL: patch for _sasl_add_string.
A patch is indicated in information sources.

Wind River Linux: version 10.19.45.3.
The version 10.19.45.3 is fixed:
  https://support2.windriver.com/
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