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
Junos OS Evolved=12.1x46
Junos OS Evolved=12.1x46-d10
Junos OS Evolved=12.1x46-d15
Junos OS Evolved=12.1x46-d20
Junos OS Evolved=12.1x46-d25
Junos OS Evolved=12.1x46-d30
Junos OS Evolved=12.1x46-d35
Junos OS Evolved=12.1x46-d40
Junos OS Evolved=12.1x46-d45
Junos OS Evolved=12.1x46-d50
Junos OS Evolved=12.1x46-d55
Junos OS Evolved=12.1x46-d60
Junos OS Evolved=12.1x46-d65
Junos OS Evolved=12.3
Junos OS Evolved=12.3-r1
Junos OS Evolved=12.3-r11
Junos OS Evolved=12.3-r2
Junos OS Evolved=12.3-r3
Junos OS Evolved=12.3-r4
Junos OS Evolved=12.3-r5
Junos OS Evolved=12.3-r6
Junos OS Evolved=12.3-r7
Junos OS Evolved=12.3-r8
Junos OS Evolved=12.3-r9
Junos OS Evolved=12.3x48
Junos OS Evolved=12.3x48-d10
Junos OS Evolved=12.3x48-d15
Junos OS Evolved=12.3x48-d20
Junos OS Evolved=12.3x48-d25
Junos OS Evolved=12.3x48-d30
Junos OS Evolved=12.3x48-d35
Junos OS Evolved=12.3x48-d40
Junos OS Evolved=12.3x48-d45
Junos OS Evolved=12.3x48-d50
Junos OS Evolved=12.3x48-d55
Junos OS Evolved=12.3x48-d60
Junos OS Evolved=12.3x48-d65
Junos OS Evolved=12.3x48-d70
Junos OS Evolved=12.3x48-d75
Junos OS Evolved=15.1
Junos OS Evolved=15.1-f2
Junos OS Evolved=15.1-f3
Junos OS Evolved=15.1-f4
Junos OS Evolved=15.1-f5
Junos OS Evolved=15.1-f6
Junos OS Evolved=15.1-f7
Junos OS Evolved=15.1-r1
Junos OS Evolved=15.1-r2
Junos OS Evolved=15.1-r3
Junos OS Evolved=15.1-r6
Junos OS Evolved=15.1x49
Junos OS Evolved=15.1x49-d10
Junos OS Evolved=15.1x49-d100
Junos OS Evolved=15.1x49-d110
Junos OS Evolved=15.1x49-d120
Junos OS Evolved=15.1x49-d140
Junos OS Evolved=15.1x49-d20
Junos OS Evolved=15.1x49-d30
Junos OS Evolved=15.1x49-d35
Junos OS Evolved=15.1x49-d40
Junos OS Evolved=15.1x49-d45
Junos OS Evolved=15.1x49-d50
Junos OS Evolved=15.1x49-d55
Junos OS Evolved=15.1x49-d60
Junos OS Evolved=15.1x49-d65
Junos OS Evolved=15.1x49-d70
Junos OS Evolved=15.1x49-d75
Junos OS Evolved=15.1x49-d80
Junos OS Evolved=15.1x49-d90
Junos OS Evolved=15.1x53
Junos OS Evolved=15.1x53-d50
Junos OS Evolved=15.1x53-d51
Junos OS Evolved=15.1x53-d52
Junos OS Evolved=15.1x53-d55
Junos OS Evolved=15.1x53-d57
Junos OS Evolved=15.1x53-d58
Juniper EX2300-24T
Juniper EX3400
Junos OS Evolved=15.1x53-d10
Junos OS Evolved=15.1x53-d20
Junos OS Evolved=15.1x53-d21
Junos OS Evolved=15.1x53-d30
Junos OS Evolved=15.1x53-d32
Junos OS Evolved=15.1x53-d33
Junos OS Evolved=15.1x53-d34
Junos OS Evolved=15.1x53-d60
Junos OS Evolved=15.1x53-d61
Junos OS Evolved=15.1x53-d62
Junos OS Evolved=15.1x53-d63
Junos OS Evolved=15.1x53-d64
Junos OS Evolved=15.1x53-d65
Junos OS Evolved=15.1x53-d66
Juniper Networks QFX-Series
Junos OS Evolved=15.1x53-d210
Junos OS Evolved=15.1x53-d230
Junos OS Evolved=15.1x53-d231
Junos OS Evolved=15.1x53-d232
Juniper QFX5110
Juniper QFX5200-32C
Junos OS Evolved=15.1x53-d40
Junos OS Evolved=15.1x53-d45
Junos OS Evolved=15.1x53-d490
Juniper NFX
Juniper NFX
Junos OS Evolved=16.1
Junos OS Evolved=16.1-r1
Junos OS Evolved=16.1-r2
Junos OS Evolved=16.1-r3
Junos OS Evolved=16.1-r4
Junos OS Evolved=16.1-r5
Junos OS Evolved=16.2
Junos OS Evolved=16.2-r1
Junos OS Evolved=17.1
Junos OS Evolved=17.1-r1
Junos OS Evolved=17.2
Junos OS Evolved=17.2-r1
Junos OS Evolved=17.2x75
Junos OS Evolved=17.2x75-d50
Junos OS Evolved=17.2x75-d90
Junos OS Evolved=17.3
Junos OS Evolved=17.3-r1
Junos OS Evolved=17.4
Junos OS Evolved=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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