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Vulnerability of Junos OS: privilege escalation via EX4300 Firewall Filter

Synthesis of the vulnerability 

An attacker can bypass restrictions via EX4300 Firewall Filter of Junos OS, in order to escalate his privileges.
Vulnerable products: Juniper EX-Series, Junos OS.
Severity of this weakness: 2/4.
Creation date: 11/07/2019.
Références of this bulletin: CERTFR-2019-AVI-325, CVE-2019-0048, JSA10942, VIGILANCE-VUL-29742.

Description of the vulnerability 

An attacker can bypass restrictions via EX4300 Firewall Filter of Junos OS, in order to escalate his privileges.
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This threat alert impacts software or systems such as Juniper EX-Series, Junos OS.

Our Vigil@nce team determined that the severity of this computer vulnerability bulletin is medium.

The trust level is of type confirmed by the editor, with an origin of intranet client.

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

Solutions for this threat 

Junos OS: fixed versions for EX4300 Firewall Filter.
Fixed versions are indicated in information sources.
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