Junos OS: Receipt of malformed DHCPv6 packets causes jdhcpd to crash and restart.

Summary

On Juniper Networks Junos OS platforms configured as DHCPv6 local server or DHCPv6 Relay Agent, the Juniper Networks Dynamic Host Configuration Protocol Daemon (JDHCPD) process might crash if a malformed DHCPv6 packet is received, resulting in a restart of the daemon. The daemon automatically restarts without intervention, but continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue only affects DHCPv6. DHCPv4 is not affected by this issue. This issue affects Juniper Networks Junos OS: 17.3 versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R1-S8, 18.4R3-S7; 19.1 versions prior to 19.1R3-S5; 19.2 versions prior to 19.2R3-S2; 19.3 versions prior to 19.3R3-S2; 19.4 versions prior to 19.4R3-S2; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R2-S3, 20.2R3; 20.3 versions prior to 20.3R2; 20.4 versions prior to 20.4R2.

Timeline

1. Apr 22, 2021, 7:37 PM UTCCVE published
2. Sep 16, 2024, 8:26 PM UTCRecord last updated

Affected versions

• Juniper Networks Junos OS

  From 17.3 · fixed in 17.3R3-S12; From 17.4 · fixed in 17.4R3-S5; From 18.1 · fixed in 18.1R3-S13; From 18.2 · fixed in 18.2R3-S8; From 18.3 · fixed in 18.3R3-S5; From 19.1 · fixed in 19.1R3-S5; From 19.2 · fixed in 19.2R3-S2; From 19.3 · fixed in 19.3R3-S2; From 19.4 · fixed in 19.4R3-S2; From 20.1 · fixed in 20.1R3; From 20.3 · fixed in 20.3R2; From 20.4 · fixed in 20.4R2

References 1