CVE-2020-1672

Junos OS: jdhcpd process crash when processing a specific DHCPDv6 packet in DHCPv6 relay configuration.

State: Published
Severity: 7.5 High
Published: Oct 16, 2020
Updated: Sep 16, 2024
Reserved: Nov 4, 2019

Description

On Juniper Networks Junos OS devices configured with DHCPv6 relay enabled, receipt of a specific DHCPv6 packet might crash the jdhcpd daemon. The jdhcpd daemon automatically restarts without intervention, but continuous receipt of specific crafted DHCP messages will repeatedly crash jdhcpd, leading to an extended Denial of Service (DoS) condition. Only DHCPv6 packet can trigger this issue. DHCPv4 packet cannot trigger this issue. This issue affects Juniper Networks Junos OS: 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S11, 17.4R3-S2, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R2-S2, 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R2-S1, 19.2R3; 19.3 versions prior to 19.3R2-S4, 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S1, 19.4R3; 20.1 versions prior to 20.1R1-S3, 20.1R2.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	juniper

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
Junos OSJuniper Networks	17.3 to before 17.3R3-S9Affected 17.4 to before 17.4R2-S11, 17.4R3-S2, 17.4R3-S3Affected 18.1 to before 18.1R3-S11Affected 18.2 to before 18.2R3-S5Affected 18.2X75 to before 18.2X75-D34, 18.2X75-D65Affected 18.3 to before 18.3R2-S4, 18.3R3-S3Affected 18.4 to before 18.4R2-S5, 18.4R3-S4Affected 19.1 to before 19.1R2-S2, 19.1R3-S2Affected 19.2 to before 19.2R1-S5, 19.2R2-S1, 19.2R3Affected 19.3 to before 19.3R2-S4, 19.3R2-S4, 19.3R3Affected 19.4 to before 19.4R1-S3, 19.4R2-S1, 19.4R3Affected 20.1 to before 20.1R1-S3, 20.1R2Affected

Product

Versions

Junos OSJuniper Networks

17.3 to before 17.3R3-S9Affected
17.4 to before 17.4R2-S11, 17.4R3-S2, 17.4R3-S3Affected
18.1 to before 18.1R3-S11Affected
18.2 to before 18.2R3-S5Affected
18.2X75 to before 18.2X75-D34, 18.2X75-D65Affected
18.3 to before 18.3R2-S4, 18.3R3-S3Affected
18.4 to before 18.4R2-S5, 18.4R3-S4Affected
19.1 to before 19.1R2-S2, 19.1R3-S2Affected
19.2 to before 19.2R1-S5, 19.2R2-S1, 19.2R3Affected
19.3 to before 19.3R2-S4, 19.3R2-S4, 19.3R3Affected
19.4 to before 19.4R1-S3, 19.4R2-S1, 19.4R3Affected
20.1 to before 20.1R1-S3, 20.1R2Affected

References

https://kb.juniper.net/JSA11069

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