medium
5.3
CWE
400
Advisory Published
Updated

CVE-2018-0061: Junos OS: Denial of service in telnetd

First published: Wed Oct 10 2018(Updated: )

A denial of service vulnerability in the telnetd service on Junos OS allows remote unauthenticated users to cause high CPU usage which may affect system performance. Affected releases are Juniper Networks Junos OS: 12.1X46 versions prior to 12.1X46-D81 on SRX Series; 12.3 versions prior to 12.3R12-S11; 12.3X48 versions prior to 12.3X48-D80 on SRX Series; 15.1 versions prior to 15.1R7; 15.1X49 versions prior to 15.1X49-D150, 15.1X49-D160 on SRX Series; 15.1X53 versions prior to 15.1X53-D59 on EX2300/EX3400 Series; 15.1X53 versions prior to 15.1X53-D68 on QFX10K Series; 15.1X53 versions prior to 15.1X53-D235 on QFX5200/QFX5110 Series; 15.1X53 versions prior to 15.1X53-D495 on NFX Series; 16.1 versions prior to 16.1R4-S12, 16.1R6-S6, 16.1R7; 16.2 versions prior to 16.2R2-S7, 16.2R3; 17.1 versions prior to 17.1R2-S9, 17.1R3; 17.2 versions prior to 17.2R2-S6, 17.2R3; 17.2X75 versions prior to 17.2X75-D100; 17.3 versions prior to 17.3R2-S4, 17.3R3; 17.4 versions prior to 17.4R1-S5, 17.4R2; 18.2X75 versions prior to 18.2X75-D5.

Credit: sirt@juniper.net

Affected SoftwareAffected VersionHow to fix
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=12.3x48-d75
Juniper Junos=15.1
Juniper Junos=15.1-f2
Juniper Junos=15.1-f3
Juniper Junos=15.1-f4
Juniper Junos=15.1-f5
Juniper Junos=15.1-f6
Juniper Junos=15.1-f7
Juniper Junos=15.1-r1
Juniper Junos=15.1-r2
Juniper Junos=15.1-r3
Juniper Junos=15.1-r6
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 EX2300-24T
Juniper EX3400
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 QFX10000
Juniper Junos=15.1x53-d210
Juniper Junos=15.1x53-d230
Juniper Junos=15.1x53-d231
Juniper Junos=15.1x53-d232
Juniper QFX5110
Juniper QFX5200-48Y
Juniper Junos=15.1x53-d40
Juniper Junos=15.1x53-d45
Juniper Junos=15.1x53-d490
Juniper NFX
Juniper NFX
Juniper Junos=16.1
Juniper Junos=16.1-r1
Juniper Junos=16.1-r2
Juniper Junos=16.1-r3
Juniper Junos=16.1-r4
Juniper Junos=16.1-r5
Juniper Junos=16.2
Juniper Junos=16.2-r1
Juniper Junos=17.1
Juniper Junos=17.1-r1
Juniper Junos=17.2
Juniper Junos=17.2-r1
Juniper Junos=17.2x75
Juniper Junos=17.2x75-d50
Juniper Junos=17.2x75-d90
Juniper Junos=17.3
Juniper Junos=17.3-r1
Juniper Junos=17.4
Juniper Junos=18.2x75

Remedy

The following software releases have been updated to resolve this specific issue: 12.1X46-D81, 12.3R12-S11, 12.3R13, 12.3X48-D80, 15.1R7, 15.1X49-D150, 15.1X49-D160, 15.1X53-D235, 15.1X53-D495, 15.1X53-D59, 15.1X53-D68, 16.1R4-S12, 16.1R6-S6, 16.1R7, 16.2R2-S7, 16.2R3, 17.1R2-S9, 17.1R3, 17.2R2-S6, 17.2R3, 17.2X75-D100, 17.2X75-D110, 17.3R2-S4, 17.3R3, 17.4R1-S5, 17.4R2, 18.1R1, 18.1R2, 18.2R1, 18.2X75-D5, and all subsequent releases.

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2018-0061?

    CVE-2018-0061 has been classified as a medium severity vulnerability due to its potential to cause denial of service.

  • How do I fix CVE-2018-0061?

    To fix CVE-2018-0061, update your Junos OS to a version that is not affected, specifically 12.1X46-D81 or later.

  • Which versions are affected by CVE-2018-0061?

    CVE-2018-0061 affects Junos OS versions prior to 12.1X46-D81 and certain versions of 12.3 and others listed in the advisory.

  • What impact does CVE-2018-0061 have on my system?

    CVE-2018-0061 may lead to high CPU usage, significantly affecting the performance of affected systems.

  • Who is affected by CVE-2018-0061?

    Organizations using vulnerable versions of Juniper Networks' Junos OS on devices like SRX Series and certain others may be affected by CVE-2018-0061.

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