CVE-2018-0051 - CVE House
Back to Database
Status published High CVE-2018-0051

Junos OS: Denial of Service vulnerability in MS-PIC, MS-MIC, MS-MPC, MS-DPC and SRX flow daemon (flowd) related to SIP ALG

Vulnerability Description

A Denial of Service vulnerability in the SIP application layer gateway (ALG) component of Junos OS based platforms allows an attacker to crash MS-PIC, MS-MIC, MS-MPC, MS-DPC or SRX flow daemon (flowd) process. This issue affects Junos OS devices with NAT or stateful firewall configuration in combination with the SIP ALG enabled. SIP ALG is enabled by default on SRX Series devices except for SRX-HE devices. SRX-HE devices have SIP ALG disabled by default. The status of ALGs in SRX device can be obtained by executing the command: show security alg status Affected releases are Juniper Networks Junos OS: 12.1X46 versions prior to 12.1X46-D77; 12.3X48 versions prior to 12.3X48-D70; 15.1X49 versions prior to 15.1X49-D140; 15.1 versions prior to 15.1R4-S9, 15.1R7-S1; 15.1F6; 16.1 versions prior to 16.1R4-S9, 16.1R6-S1, 16.1R7; 16.2 versions prior to 16.2R2-S7, 16.2R3; 17.1 versions prior to 17.1R2-S7, 17.1R3; 17.2 versions prior to 17.2R1-S6, 17.2R2-S4, 17.2R3; 17.3 versions prior to 17.3R1-S5, 17.3R2-S2, 17.3R3; 17.4 versions prior to 17.4R2. No other Juniper Networks products or platforms are affected by this issue.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2018-0051

Credits & Attribution

No credits recorded in the NVD database.

References

More from Juniper Networks

View All →
CVE-2025-6549
Junos OS: SRX Series: J-Web can be exposed on additional interfaces
Medium 6.9
CVE-2025-60011
Junos OS and Junos OS Evolved: Optional transitive BGP attribute is modified before propagation to peers causing sessions to flap
Medium 6.9
CVE-2025-60010
Junos OS and Junos OS Evolved: Device allows login for user with expired password
Medium 5.3
CVE-2025-60009
Junos Space: CLI Configlet page is vulnerable to reflected cross-site script injection
Medium 5.1
CVE-2025-60007
Junos OS: A specifically crafted 'show chassis' command causes chassisd to crash
Medium 6.8

Affected Vendor

Juniper Networks

View all reports →

Affected Software

Junos OS
Vulnerable Versions:
12.1X46, 12.3X48, 15.1X49, 15.1F6, 15.1, 16.1, 16.2, 17.1, 17.2, 17.3, 17.4

Timeline

Official Publish: October 10th, 2018
Last Modified: September 16th, 2024
Added to House: July 20th, 2026

CVSS Vectors

V3: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.