Junos OS: SIP ALG flowd DoS (JSA10953)

Medium Nessus Plugin ID 130505


The remote device is missing a vendor-supplied security patch.


According to its self-reported version number, the remote Juniper Junos device is affected by a vulnerability in the SIP ALG packet processing service which allows an attacker to cause a Denial of Service (DoS) to the device. A remote, unauthenticated attacker can exploit this by sending specific types of valid SIP traffic to the device to cause the flowd process to crash and generate a core dump while processing SIP ALG traffic. Continued receipt of these SIP packets will cause the device to stop responding.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.


Apply the relevant Junos software release referenced in Juniper advisory JSA10953.

See Also


Plugin Details

Severity: Medium

ID: 130505

File Name: juniper_jsa10953.nasl

Version: 1.2

Type: combined

Published: 2019/11/05

Updated: 2019/11/05

Dependencies: 55932

Risk Information

Risk Factor: Medium

CVSS Score Source: CVE-2019-0055

CVSS v2.0

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS v3.0

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vulnerability Information

CPE: cpe:/o:juniper:junos

Required KB Items: Host/Juniper/JUNOS/Version, Host/Juniper/model

Patch Publication Date: 2019/10/09

Vulnerability Publication Date: 2019/10/09

Reference Information

CVE: CVE-2019-0055

JSA: JSA10953

IAVA: 2019-A-0388