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CVE

CVE-2020-1672

On Juniper Networks Junos OS devices configured with DHCPv6 relay enabled, receipt of a specific DHCPv6 packet might cra

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, 19.3R3.

19.4 versions prior to 19.4R1-S3, 19.4R2-S1, 19.4R3.

20.1 versions prior to 20.1R1-S3, 20.1R2.

HIGH · CVSS 7.5 EPSS 0.00288
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-20Improper Input Validation
▤

Affected Products & Versions

1
juniper junosall versions
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · sirt@juniper.net
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD16 Oct 2020 · 09:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://kb.juniper.net/JSA11069Vendor Advisory
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