Vulnerability Database

393,975

Total vulnerabilities in the database

CVE-2018-0052 — juniper / junos

Improper Authentication

If RSH service is enabled on Junos OS and if the PAM authentication is disabled, a remote unauthenticated attacker can obtain root access to the device. RSH service is disabled by default on Junos. There is no documented CLI command to enable this service. However, an undocumented CLI command allows a privileged Junos user to enable RSH service and disable PAM, and hence expose the system to unauthenticated root access. When RSH is enabled, the device is listing to RSH connections on port 514. This issue is not exploitable on platforms where Junos release is based on FreeBSD 10+. Affected releases are Juniper Networks Junos OS: 12.1X46 versions prior to 12.1X46-D77 on SRX Series; 12.3 versions prior to 12.3R12-S10; 12.3X48 versions prior to 12.3X48-D75 on SRX Series; 14.1X53 versions prior to 14.1X53-D47 on QFX/EX Series; 15.1 versions prior to 15.1R4-S9, 15.1R6-S6, 15.1R7; 15.1X49 versions prior to 15.1X49-D131, 15.1X49-D140 on SRX Series; 15.1X53 versions prior to 15.1X53-D59 on EX2300/EX3400 Series; 15.1X53 versions prior to 15.1X53-D67 on QFX10K Series; 15.1X53 versions prior to 15.1X53-D233 on QFX5200/QFX5110 Series; 15.1X53 versions prior to 15.1X53-D471, 15.1X53-D490 on NFX Series; 16.1 versions prior to 16.1R3-S9, 16.1R4-S9, 16.1R5-S4, 16.1R6-S4, 16.1R7; 16.2 versions prior to 16.2R2-S5; 17.1 versions prior to 17.1R1-S7, 17.1R2-S7, 17.1R3; 17.2 versions prior to 17.2R1-S6, 17.2R2-S4, 17.2R3; 17.2X75 versions prior to 17.2X75-D110, 17.2X75-D91; 17.3 versions prior to 17.3R1-S4, 17.3R2-S2, 17.3R3; 17.4 versions prior to 17.4R1-S3, 17.4R2; 18.2X75 versions prior to 18.2X75-D5.

  • Published: Oct 10, 2018
  • Updated: Oct 5, 2026
  • CVE: CVE-2018-0052
  • Severity: High
  • Exploit:
  • CISA KEV:

CVSS v3:

  • Severity: High
  • Score: 7.2
  • AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS v2:

  • Severity: High
  • Score: 9.3
  • AV:N/AC:M/Au:N/C:C/I:C/A:C
Software Affected versions
juniper / junos = 12.1x46
juniper / junos = 12.1x46-d10
juniper / junos = 12.1x46-d15
juniper / junos = 12.1x46-d20
juniper / junos = 12.1x46-d25
juniper / junos = 12.1x46-d30
juniper / junos = 12.1x46-d35
juniper / junos = 12.1x46-d40
juniper / junos = 12.1x46-d45
juniper / junos = 12.1x46-d50
juniper / junos = 12.1x46-d55
juniper / junos = 12.1x46-d60
juniper / junos = 12.1x46-d65
juniper / junos = 12.3
juniper / junos = 12.3-r1
juniper / junos = 12.3-r11
juniper / junos = 12.3-r2
juniper / junos = 12.3-r3
juniper / junos = 12.3-r4
juniper / junos = 12.3-r5
juniper / junos = 12.3-r6
juniper / junos = 12.3-r7
juniper / junos = 12.3-r8
juniper / junos = 12.3-r9
juniper / junos = 12.3x48
juniper / junos = 12.3x48-d10
juniper / junos = 12.3x48-d15
juniper / junos = 12.3x48-d20
juniper / junos = 12.3x48-d25
juniper / junos = 12.3x48-d30
juniper / junos = 12.3x48-d35
juniper / junos = 12.3x48-d40
juniper / junos = 12.3x48-d45
juniper / junos = 12.3x48-d50
juniper / junos = 12.3x48-d55
juniper / junos = 12.3x48-d60
juniper / junos = 12.3x48-d65
juniper / junos = 12.3x48-d70
juniper / junos = 14.1x53
juniper / junos = 14.1x53-d10
juniper / junos = 14.1x53-d121
juniper / junos = 14.1x53-d15
juniper / junos = 14.1x53-d16
juniper / junos = 14.1x53-d25
juniper / junos = 14.1x53-d26
juniper / junos = 14.1x53-d27
juniper / junos = 14.1x53-d30
juniper / junos = 14.1x53-d35
juniper / junos = 14.1x53-d40
juniper / junos = 14.1x53-d42
juniper / junos = 14.1x53-d43
juniper / junos = 14.1x53-d44
juniper / junos = 14.1x53-d45
juniper / junos = 14.1x53-d46
juniper / junos = 15.1
juniper / junos = 15.1-r1
juniper / junos = 15.1-r2
juniper / junos = 15.1-r3
juniper / junos = 15.1-r6-s6
juniper / junos = 15.1-r7
juniper / junos = 15.1x49
juniper / junos = 15.1x49-d10
juniper / junos = 15.1x49-d100
juniper / junos = 15.1x49-d110
juniper / junos = 15.1x49-d120
juniper / junos = 15.1x49-d140
juniper / junos = 15.1x49-d20
juniper / junos = 15.1x49-d30
juniper / junos = 15.1x49-d35
juniper / junos = 15.1x49-d40
juniper / junos = 15.1x49-d45
juniper / junos = 15.1x49-d50
juniper / junos = 15.1x49-d55
juniper / junos = 15.1x49-d60
juniper / junos = 15.1x49-d65
juniper / junos = 15.1x49-d70
juniper / junos = 15.1x49-d75
juniper / junos = 15.1x49-d80
juniper / junos = 15.1x49-d90
juniper / junos = 15.1x53
juniper / junos = 15.1x53-d50
juniper / junos = 15.1x53-d51
juniper / junos = 15.1x53-d52
juniper / junos = 15.1x53-d55
juniper / junos = 15.1x53-d57
juniper / junos = 15.1x53-d58
juniper / junos = 15.1x53-d10
juniper / junos = 15.1x53-d20
juniper / junos = 15.1x53-d21
juniper / junos = 15.1x53-d30
juniper / junos = 15.1x53-d32
juniper / junos = 15.1x53-d33
juniper / junos = 15.1x53-d34
juniper / junos = 15.1x53-d60
juniper / junos = 15.1x53-d61
juniper / junos = 15.1x53-d62
juniper / junos = 15.1x53-d63
juniper / junos = 15.1x53-d64
juniper / junos = 15.1x53-d65
juniper / junos = 15.1x53-d66
juniper / junos = 15.1x53-d210
juniper / junos = 15.1x53-d230
juniper / junos = 15.1x53-d231
juniper / junos = 15.1x53-d232
juniper / junos = 15.1x53-d40
juniper / junos = 15.1x53-d45
juniper / junos = 15.1x53-d490
juniper / junos = 16.1
juniper / junos = 16.1-r1
juniper / junos = 16.1-r2
juniper / junos = 16.1-r3
juniper / junos = 16.1-r4-s9
juniper / junos = 16.1-r5-s4
juniper / junos = 16.1-r6-s4
juniper / junos = 16.1-r7
juniper / junos = 16.2
juniper / junos = 16.2-r1
juniper / junos = 17.1
juniper / junos = 17.1-r2-s7
juniper / junos = 17.1-r3
juniper / junos = 17.2
juniper / junos = 17.2-r1
juniper / junos = 17.2-r2
juniper / junos = 17.2x75
juniper / junos = 17.2x75-d91
juniper / junos = 17.3
juniper / junos = 17.3-r2-s2
juniper / junos = 17.3-r3
juniper / junos = 17.4
juniper / junos = 17.4-r2
juniper / junos = 18.2x75

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.