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Vulnerability of FreeBSD: out-of-bounds memory reading via bsnmp

Synthesis of the vulnerability 

An attacker can force a read at an invalid address via bsnmp of FreeBSD, in order to trigger a denial of service, or to obtain sensitive information.
Vulnerable software: FreeBSD, Juniper EX-Series, Juniper J-Series, Junos OS, MX-Series, PTX-Series, QFX-Series, SRX-Series, pfSense.
Severity of this announce: 2/4.
Creation date: 07/08/2019.
Références of this computer vulnerability: CVE-2019-5610, FreeBSD-SA-19:20.bsnmp, JSA11047, VIGILANCE-VUL-29965.

Description of the vulnerability 

An attacker can force a read at an invalid address via bsnmp of FreeBSD, in order to trigger a denial of service, or to obtain sensitive information.
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This computer vulnerability bulletin impacts software or systems such as FreeBSD, Juniper EX-Series, Juniper J-Series, Junos OS, MX-Series, PTX-Series, QFX-Series, SRX-Series, pfSense.

Our Vigil@nce team determined that the severity of this 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 threat note.

Solutions for this threat 

FreeBSD: patch for bsnmp.
A patch is indicated in information sources.

Junos OS: fixed versions for FreeBSD bsnmp.
Fixed versions are indicated in information sources.

pfSense: version 2.4.5.
The version 2.4.5 is fixed:
  https://www.netgate.com/solutions/pfsense/
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