CVE-2020-1686

Summary

On Juniper Networks Junos OS devices, receipt of a malformed IPv6 packet may cause the system to crash and restart (vmcore). This issue can be trigged by a malformed IPv6 packet destined to the Routing Engine. An attacker can repeatedly send the offending packet resulting in an extended Denial of Service condition. Only IPv6 packets can trigger this issue. IPv4 packets cannot trigger this issue. This issue affects Juniper Networks Junos OS 18.4 versions prior to 18.4R2-S4, 18.4R3-S1; 19.1 versions prior to 19.1R2-S1, 19.1R3; 19.2 versions prior to 19.2R1-S5, 19.2R2; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2. This issue does not affect Juniper Networks Junos OS prior to 18.4R1.

Affected Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OSunspecified < 18.4R1unaffected
Juniper NetworksJunos OS18.4 < 18.4R2-S4, 18.4R3-S1affected
Juniper NetworksJunos OS19.1 < 19.1R2-S1, 19.1R3affected
Juniper NetworksJunos OS19.2 < 19.2R1-S5, 19.2R2affected
Juniper NetworksJunos OS19.3 < 19.3R2-S4, 19.3R3affected
Juniper NetworksJunos OS19.4 < 19.4R1-S3, 19.4R2affected

Weaknesses

  • CWE-415: CWE-415 Double Free

Workarounds

Standard security best common practices such as limiting packet toward the RE only from trusted networks/host using firewall filter in combination with source address anti-spoofing should be applied to reduce the risk of exposure.

ADP Enrichment

CVE Program Container

Additional References

References