high
7.5
CWE
755 703
Advisory Published
Updated

CVE-2020-1639: Junos OS: A crafted Ethernet OAM packet received by Junos may cause the Ethernet OAM connectivity fault management process (CFM) to core.

First published: Wed Apr 08 2020(Updated: )

When an attacker sends a specific crafted Ethernet Operation, Administration, and Maintenance (Ethernet OAM) packet to a target device, it may improperly handle the incoming malformed data and fail to sanitize this incoming data resulting in an overflow condition. This overflow condition in Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) condition by coring the CFM daemon. Continued receipt of these packets may cause an extended Denial of Service condition. This issue affects: Juniper Networks Junos OS 12.3 versions prior to 12.3R12-S15; 12.3X48 versions prior to 12.3X48-D95 on SRX Series; 14.1X50 versions prior to 14.1X50-D145; 14.1X53 versions prior to 14.1X53-D47; 15.1 versions prior to 15.1R2; 15.1X49 versions prior to 15.1X49-D170 on SRX Series; 15.1X53 versions prior to 15.1X53-D67.

Credit: sirt@juniper.net

Affected SoftwareAffected VersionHow to fix
Juniper Junos=12.3
Juniper Junos=12.3-r1
Juniper Junos=12.3-r10
Juniper Junos=12.3-r10-s1
Juniper Junos=12.3-r10-s2
Juniper Junos=12.3-r11
Juniper Junos=12.3-r12
Juniper Junos=12.3-r12-s1
Juniper Junos=12.3-r12-s11
Juniper Junos=12.3-r12-s12
Juniper Junos=12.3-r12-s13
Juniper Junos=12.3-r12-s14
Juniper Junos=12.3-r12-s3
Juniper Junos=12.3-r12-s4
Juniper Junos=12.3-r12-s6
Juniper Junos=12.3-r12-s8
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-d51
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=12.3x48-d80
Juniper Junos=14.1x50
Juniper Junos=14.1x50-d60
Juniper Junos=14.1x53
Juniper Junos=14.1x53-d10
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=15.1
Juniper Junos=15.1-a1
Juniper Junos=15.1-f
Juniper Junos=15.1-f1
Juniper Junos=15.1-f2
Juniper Junos=15.1-f2-s1
Juniper Junos=15.1-f2-s2
Juniper Junos=15.1-f2-s3
Juniper Junos=15.1-f2-s4
Juniper Junos=15.1-f3
Juniper Junos=15.1-f4
Juniper Junos=15.1-f5
Juniper Junos=15.1-f5-s7
Juniper Junos=15.1-f6
Juniper Junos=15.1-f6-s1
Juniper Junos=15.1-f6-s12
Juniper Junos=15.1-f6-s2
Juniper Junos=15.1-f6-s3
Juniper Junos=15.1-f6-s4
Juniper Junos=15.1-f6-s7
Juniper Junos=15.1-f7
Juniper Junos=15.1-r1
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-d130
Juniper Junos=15.1x49-d140
Juniper Junos=15.1x49-d15
Juniper Junos=15.1x49-d150
Juniper Junos=15.1x49-d160
Juniper Junos=15.1x49-d20
Juniper Junos=15.1x49-d25
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-d10
Juniper Junos=15.1x53-d20
Juniper Junos=15.1x53-d21
Juniper Junos=15.1x53-d25
Juniper Junos=15.1x53-d30
Juniper Junos=15.1x53-d31
Juniper Junos=15.1x53-d32
Juniper Junos=15.1x53-d33
Juniper Junos=15.1x53-d34
Juniper Junos=15.1x53-d40
Juniper Junos=15.1x53-d45
Juniper Junos=15.1x53-d47
Juniper Junos=15.1x53-d48
Juniper Junos=15.1x53-d50
Juniper Junos=15.1x53-d51
Juniper Junos=15.1x53-d52
Juniper Junos=15.1x53-d55
Juniper Junos=15.1x53-d56
Juniper Junos=15.1x53-d57
Juniper Junos=15.1x53-d58
Juniper Junos=15.1x53-d59
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

Remedy

The following software releases have been updated to resolve this specific issue: 12.3R12-S15, 12.3X48-D95, 14.1X50-D145, 14.1X53-D47, 15.1R2, 15.1X49-D170, 16.1R1, and all subsequent releases.

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2020-1639?

    The severity of CVE-2020-1639 is classified as high due to the potential for an attacker to exploit the vulnerability to cause an overflow condition.

  • How do I fix CVE-2020-1639?

    To fix CVE-2020-1639, update the affected Juniper JUNOS versions to the latest patched versions provided by Juniper Networks.

  • Which versions of Juniper JUNOS are affected by CVE-2020-1639?

    CVE-2020-1639 affects specific versions of Juniper JUNOS including 12.3, 14.1, and 15.1 along with various sub-releases.

  • What is the impact of CVE-2020-1639?

    The impact of CVE-2020-1639 includes potential remote code execution or denial of service due to unhandled malformed Ethernet OAM packets.

  • Is there a workaround for CVE-2020-1639 until a patch is applied?

    Currently, no official workaround is suggested for CVE-2020-1639, thus applying the recommended patch is essential for security.

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