high
8.8
CWE
78 416
Advisory Published
Updated

CVE-2020-1602: Junos OS and Junos OS Evolved: A vulnerability in JDHCPD allows an attacker to send crafted IPv4 packets may take over the code execution of the JDHCPD process.

First published: Wed Jan 15 2020(Updated: )

When a device using Juniper Network's Dynamic Host Configuration Protocol Daemon (JDHCPD) process on Junos OS or Junos OS Evolved which is configured in relay mode it vulnerable to an attacker sending crafted IPv4 packets who may remotely take over the code execution of the JDHDCP process. This issue affect IPv4 JDHCPD services. This issue affects: Juniper Networks Junos OS: 15.1 versions prior to 15.1R7-S6; 15.1X49 versions prior to 15.1X49-D200; 15.1X53 versions prior to 15.1X53-D592; 16.1 versions prior to 16.1R7-S6; 16.2 versions prior to 16.2R2-S11; 17.1 versions prior to 17.1R2-S11, 17.1R3-S1; 17.2 versions prior to 17.2R2-S8, 17.2R3-S3; 17.3 versions prior to 17.3R3-S6; 17.4 versions prior to 17.4R2-S7, 17.4R3; 18.1 versions prior to 18.1R3-S8; 18.2 versions prior to 18.2R3-S2; 18.2X75 versions prior to 18.2X75-D60; 18.3 versions prior to 18.3R1-S6, 18.3R2-S2, 18.3R3; 18.4 versions prior to 18.4R1-S5, 18.4R2-S3, 18.4R3; 19.1 versions prior to 19.1R1-S3, 19.1R2; 19.2 versions prior to 19.2R1-S3, 19.2R2*. and All versions prior to 19.3R1 on Junos OS Evolved. This issue do not affect versions of Junos OS prior to 15.1, or JDHCPD operating as a local server in non-relay mode.

Credit: sirt@juniper.net

Affected SoftwareAffected VersionHow to fix
Juniper Junos=15.1-r7
Juniper Junos=15.1-r7-s1
Juniper Junos=15.1-r7-s2
Juniper Junos=15.1-r7-s3
Juniper Junos=15.1-r7-s4
Juniper Junos=15.1-r7-s5
Juniper Junos=15.1x49-d10
Juniper Junos=15.1x49-d110
Juniper Junos=15.1x49-d140
Juniper Junos=15.1x49-d150
Juniper Junos=15.1x49-d170
Juniper Junos=15.1x49-d180
Juniper Junos=15.1x49-d190
Juniper Junos=15.1x49-d20
Juniper Junos=15.1x49-d30
Juniper Junos=15.1x49-d35
Juniper Junos=15.1x49-d40
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-d20
Juniper Junos=15.1x53-d21
Juniper Junos=15.1x53-d210
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-d470
Juniper Junos=15.1x53-d495
Juniper Junos=15.1x53-d56
Juniper Junos=15.1x53-d591
Juniper Junos=15.1x53-d60
Juniper Junos=15.1x53-d61
Juniper Junos=15.1x53-d62
Juniper Junos=15.1x53-d63
Juniper Junos=15.1x53-d65
Juniper Junos=15.1x53-d70
Juniper Junos=16.1
Juniper Junos=16.1-r1
Juniper Junos=16.1-r2
Juniper Junos=16.1-r3
Juniper Junos=16.1-r3-s10
Juniper Junos=16.1-r4
Juniper Junos=16.1-r5-s4
Juniper Junos=16.1-r6-s1
Juniper Junos=16.1-r7
Juniper Junos=16.1-r7-s4
Juniper Junos=16.1-r7-s5
Juniper Junos=16.2
Juniper Junos=16.2-r1
Juniper Junos=16.2-r2
Juniper Junos=16.2-r2-s1
Juniper Junos=16.2-r2-s2
Juniper Junos=16.2-r2-s5
Juniper Junos=16.2-r2-s6
Juniper Junos=16.2-r2-s7
Juniper Junos=16.2-r2-s8
Juniper Junos=16.2-r2-s9
Juniper Junos=17.1
Juniper Junos=17.1-r1
Juniper Junos=17.1-r2-s1
Juniper Junos=17.1-r2-s10
Juniper Junos=17.1-r2-s2
Juniper Junos=17.1-r2-s3
Juniper Junos=17.1-r2-s4
Juniper Junos=17.1-r2-s5
Juniper Junos=17.1-r2-s6
Juniper Junos=17.1-r2-s7
Juniper Junos=17.1-r3
Juniper Junos=17.2
Juniper Junos=17.2-r1-s2
Juniper Junos=17.2-r1-s4
Juniper Junos=17.2-r1-s7
Juniper Junos=17.2-r1-s8
Juniper Junos=17.2-r2-s6
Juniper Junos=17.2-r2-s7
Juniper Junos=17.2-r3-s1
Juniper Junos=17.2-r3-s2
Juniper Junos=17.3
Juniper Junos=17.3-r1-s1
Juniper Junos=17.3-r2
Juniper Junos=17.3-r2-s1
Juniper Junos=17.3-r2-s2
Juniper Junos=17.3-r3-s1
Juniper Junos=17.3-r3-s2
Juniper Junos=17.3-r3-s3
Juniper Junos=17.3-r3-s4
Juniper Junos=17.3-r3-s5
Juniper Junos=17.4
Juniper Junos=17.4-r1
Juniper Junos=17.4-r1-s1
Juniper Junos=17.4-r1-s2
Juniper Junos=17.4-r1-s4
Juniper Junos=17.4-r1-s6
Juniper Junos=17.4-r1-s7
Juniper Junos=17.4-r2
Juniper Junos=17.4-r2-s1
Juniper Junos=17.4-r2-s3
Juniper Junos=17.4-r2-s4
Juniper Junos=17.4-r2-s5
Juniper Junos=17.4-r2-s6
Juniper Junos=18.1-r3-s5
Juniper Junos=18.1-r3-s6
Juniper Junos=18.1-r3-s7
Juniper Junos=18.2
Juniper Junos=18.2-r1-s5
Juniper Junos=18.2-r2-s1
Juniper Junos=18.2-r2-s2
Juniper Junos=18.2-r2-s3
Juniper Junos=18.2-r2-s4
Juniper Junos=18.2-r3
Juniper Junos=18.2-r3-s1
Juniper Junos=18.2x75
Juniper Junos=18.2x75-d20
Juniper Junos=18.2x75-d40
Juniper Junos=18.3
Juniper Junos=18.3-r1
Juniper Junos=18.3-r1-s1
Juniper Junos=18.3-r1-s2
Juniper Junos=18.3-r1-s3
Juniper Junos=18.3-r1-s4
Juniper Junos=18.3-r1-s5
Juniper Junos=18.3-r2
Juniper Junos=18.4
Juniper Junos=18.4-r1
Juniper Junos=18.4-r1-s1
Juniper Junos=18.4-r1-s2
Juniper Junos=18.4-r1-s3
Juniper Junos=18.4-r1-s4
Juniper Junos=18.4-r2
Juniper Junos=19.1-r1
Juniper Junos=19.1-r1-s1
Juniper Junos=19.1-r1-s2
Juniper Junos=19.2-r1
Juniper Junos=19.2-r1-s1
Juniper Junos=19.2-r1-s2

Remedy

The following software releases have been updated to resolve this specific issue: Junos OS: 15.1R7-S6, 15.1X49-D200, 15.1X53-D592, 16.1R7-S6, 16.2R2-S11, 17.1R2-S11, 17.1R3-S1, 17.2R2-S8, 17.2R3-S3, 17.3R3-S6, 17.4R2-S7, 17.4R3, 18.1R3-S8, 18.2R3-S2, 18.2X75-D60, 18.3R1-S6, 18.3R2-S2, 18.3R3, 18.4R1-S5, 18.4R2-S3, 18.4R3, 19.1R1-S3, 19.1R2, 19.2R1-S3, 19.2R2*, 19.3R1, and all subsequent releases. Junos OS Evolved: 19.3R1, and all subsequent releases. *pending publication

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2020-1602?

    CVE-2020-1602 has been classified with a CVSS score that indicates a critical severity, allowing remote code execution through crafted IPv4 packets.

  • How do I fix CVE-2020-1602?

    To remediate CVE-2020-1602, Juniper Networks advises upgrading to the latest patched version of the Junos OS as specified in their security advisories.

  • What versions of Junos OS are affected by CVE-2020-1602?

    CVE-2020-1602 affects several versions of Junos OS, including 15.1, 16.1, and all the way to 19.2, specifically in configurations using the JDHCPD process.

  • Can CVE-2020-1602 lead to full system compromise?

    Yes, CVE-2020-1602 potentially allows an attacker to execute arbitrary code, which could lead to full system compromise depending on the network environment.

  • Is there a workaround for CVE-2020-1602 before patching?

    While the primary recommendation is to apply the patch, temporarily disabling DHCP relay configurations could help mitigate the risk associated with CVE-2020-1602.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203