CVE-2023-28981

Summary

An Improper Input Validation vulnerability in the kernel of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS). If the receipt of router advertisements is enabled on an interface and a specifically malformed RA packet is received, memory corruption will happen which leads to an rpd crash. This issue affects: Juniper Networks Junos OS 20.3 versions prior to 20.3R3-S5; 20.4 versions prior to 20.4R3-S3; 21.1 versions prior to 21.1R3-S4; 21.2 versions prior to 21.2R3; 21.3 versions prior to 21.3R3; 21.4 versions prior to 21.4R2; 22.1 versions prior to 22.1R2. Juniper Networks Junos OS Evolved 20.3-EVO version 20.3R1-EVO and later versions; 20.4-EVO versions prior to 20.4R3-S6-EVO; 21.3-EVO versions prior to 21.3R3-EVO; 21.4-EVO versions prior to 21.4R2-EVO; 22.1-EVO versions prior to 22.1R2-EVO.

Affected Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OS20.3 < 20.3R3-S5affected
Juniper NetworksJunos OS20.4 < 20.4R3-S3, 20.4R3-S6affected
Juniper NetworksJunos OS21.1 < 21.1R3-S4affected
Juniper NetworksJunos OS21.2 < 21.2R3affected
Juniper NetworksJunos OS21.3 < 21.3R3affected
Juniper NetworksJunos OS21.4 < 21.4R2affected
Juniper NetworksJunos OS22.1 < 22.1R2affected
Juniper NetworksJunos OS Evolved20.3R1-EVO < 20.3-EVO*affected
Juniper NetworksJunos OS Evolved20.4-EVO < 20.4R3-S6-EVOaffected
Juniper NetworksJunos OS Evolved21.3-EVO < 21.3R3-EVOaffected
Juniper NetworksJunos OS Evolved21.4-EVO < 21.4R2-EVOaffected
Juniper NetworksJunos OS Evolved22.1-EVO < 22.1R2-EVOaffected

Weaknesses

  • CWE-20: CWE-20 Improper Input Validation
  • Denial of Service (DoS)

Workarounds

If the receipt of router advertisements is not necessary (but just the solicited or unsolicited sending of RAs) then incoming RAs can be filtered and dropped by applying a firewall filter like the following:

set firewall family inet6 filter test term 1 from next-header icmp6 set firewall family inet6 filter test term 1 from icmp-type 134 set firewall family inet6 filter test term 1 then discard set firewall family inet6 filter test term 2 then accept

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

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

References