CVE-2019-0055

Name: CVE-2019-0055
Creator: NVD / NIST
Published: 2019-10-09T20:15:16.473+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.35%

Last modified Jun 17, 2026

CVE-2019-0055 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A vulnerability in the SIP ALG packet processing service of Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) to the device by sending specific types of valid SIP traffic to the device. In this case, the flowd process crashes and generates a core dump while processing SIP ALG traffic. EPSS estimates a 1.35% chance of exploitation in the next 30 days.

Description

A vulnerability in the SIP ALG packet processing service of Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) to the device by sending specific types of valid SIP traffic to the device. In this case, the flowd process crashes and generates a core dump while processing SIP ALG traffic. Continued receipt of these valid SIP packets will result in a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS: 12.3X48 versions prior to 12.3X48-D61, 12.3X48-D65 on SRX Series; 15.1X49 versions prior to 15.1X49-D130 on SRX Series; 17.3 versions prior to 17.3R3 on SRX Series; 17.4 versions prior to 17.4R2 on SRX Series.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.35%

67.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-130

Affected Software

Vendor	Product	Versions	Update
Juniper	Junos	12.3x48	D10
Juniper	Junos	15.1x49	—
Juniper	Junos	17.3	—
Juniper	Junos	17.4	—

References

https://kb.juniper.net/JSA10953Vendor Advisory
https://www.juniper.net/documentation/en_US/junos/topics/topic-map/security-sip-alg.htmlVendor Advisory
https://kb.juniper.net/JSA10953Vendor Advisory
https://www.juniper.net/documentation/en_US/junos/topics/topic-map/security-sip-alg.htmlVendor Advisory

Timeline

Published: Oct 9, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-0055?

How severe is CVE-2019-0055?

CVE-2019-0055 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.35% probability of exploitation in the next 30 days.

How do I fix CVE-2019-0055?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-0055?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST