CVE-2023-36840

Summary

A Reachable Assertion vulnerability in Routing Protocol Daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows a locally-based, low-privileged attacker to cause a Denial of Service (DoS).

On all Junos OS and Junos OS Evolved, when a specific L2VPN command is run, RPD will crash and restart. Continued execution of this specific command will create a sustained Denial of Service (DoS) condition.

This issue affects: Juniper Networks Junos OS All versions prior to 19.3R3-S10; 20.1 versions prior to 20.1R3-S4; 20.2 versions prior to 20.2R3-S6; 20.3 versions prior to 20.3R3-S6; 20.4 versions prior to 20.4R3-S5; 21.1 versions prior to 21.1R3-S4; 21.2 versions prior to 21.2R3-S3; 21.3 versions prior to 21.3R3-S2; 21.4 versions prior to 21.4R3; 22.1 versions prior to 22.1R3; 22.2 versions prior to 22.2R2; 22.3 versions prior to 22.3R2;

Juniper Networks Junos OS Evolved All versions prior to 20.4R3-S7-EVO; 21.1 versions prior to 21.1R3-S3-EVO; 21.2 versions prior to 21.2R3-S5-EVO; 21.3 versions prior to 21.3R3-S4-EVO; 21.4 versions prior to 21.4R3-EVO; 22.1 versions prior to 22.1R3-EVO; 22.2 versions prior to 22.2R2-EVO; 22.3 versions prior to 22.3R2-EVO;

Affected Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OSunspecified < 19.3R3-S10affected
Juniper NetworksJunos OS20.1 < 20.1R3-S4affected
Juniper NetworksJunos OS20.2 < 20.2R3-S6affected
Juniper NetworksJunos OS20.3 < 20.3R3-S6affected
Juniper NetworksJunos OS20.4 < 20.4R3-S5affected
Juniper NetworksJunos OS21.1 < 21.1R3-S4affected
Juniper NetworksJunos OS21.2 < 21.2R3-S3affected
Juniper NetworksJunos OS21.3 < 21.3R3-S2affected
Juniper NetworksJunos OS21.4 < 21.4R3affected
Juniper NetworksJunos OS22.1 < 22.1R3affected
Juniper NetworksJunos OS22.2 < 22.2R2affected
Juniper NetworksJunos OS22.3 < 22.3R2affected
Juniper NetworksJunos OS Evolvedunspecified < 20.4R3-S7-EVOaffected
Juniper NetworksJunos OS Evolved21.1 < 21.1R3-S3-EVOaffected
Juniper NetworksJunos OS Evolved21.2 < 21.2R3-S5-EVOaffected
Juniper NetworksJunos OS Evolved21.3 < 21.3R3-S4-EVOaffected
Juniper NetworksJunos OS Evolved21.4 < 21.4R3-EVOaffected
Juniper NetworksJunos OS Evolved22.1 < 22.1R3-EVOaffected
Juniper NetworksJunos OS Evolved22.2 < 22.2R2-EVOaffected
Juniper NetworksJunos OS Evolved22.3 < 22.3R2-EVOaffected

Weaknesses

  • CWE-617: CWE-617 Reachable Assertion
  • Denial of Service (DoS)

Workarounds

This issue can be avoided by using access lists or firewall filters to limit access to the device to only trusted hosts, networks and administrators.

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References