CVSS: v3.1: 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)CVSS: v4.0: 6.8 (CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M)
A NULL Pointer Dereference vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on MX304, MX with MPC10/11/LC9600, and EX9200 with EX9200-15C allows a locally authenticated attacker with low privileges to cause a Denial of Service (DoS).
In a VPLS or Junos Fusion scenario, the execution of specific show commands will cause all FPCs hosting VPLS sessions or connecting to satellites to crash and restart.
This issue affects Junos OS on MX304 and MX with MPC10/11/LC9600:
To be exposed to this issue at least a minimal VPLS or Junos Fusion configuration like the following need to be present:[ routing-instances <RI_name> instance-type vpls ][ chassis satellite-management ... ]
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
This issue was seen during production usage.
The following software releases have been updated to resolve this specific issue: 21.2R3-S1, 21.3R3, 21.4R2, 22.1R1, and all subsequent releases.
This issue is being tracked as 1619137 which is visible on the Customer Support website.
Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).
There are no known workarounds for this issue.
To reduce the risk of exploitation use access lists or firewall filters to limit access to the device only from trusted, administrative networks, hosts, and users.
2024-10-09: Initial Publication