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.

This issue only affects SRX Series devices where SIP ALG is enabled.

The following minimum configuration is required:

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

This issue was seen during production usage.

This issue has been assigned  CVE-2019-0055 .

The following software releases have been updated to resolve this specific issue: 12.3X48-D61, 12.3X48-D65, 15.1X49-D130, 17.3R3, 17.4R2, 18.1R1, and all subsequent releases.

This issue is being tracked as PR 1329170 which is visible on the Customer Support website.

Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).

Software Releases, patches and updates are available at https://www.juniper.net/support/downloads/ .

Disable SIP ALG if this is not needed, otherwise there are no viable workarounds for this issue.

• KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin Publication Process [juniper.net]
• KB16765: In which releases are vulnerabilities fixed? [juniper.net]
• KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories [juniper.net]
• Report a Security Vulnerability - How to Contact the Juniper Networks Security Incident Response Team
• CVE-2019-0055 at cve.mitre.org
• https://www.juniper.net/documentation/en_US/junos/topics/topic-map/security-sip-alg.html