CVE-2024-21607 Information

Description

An Unsupported Feature in the UI vulnerability in Juniper Networks Junos OS on MX Series and EX9200 Series allows an unauthenticated network-based attacker to cause partial impact to the integrity of the device.

If the cp-reset\ option is added to the eject\ action in an IPv6 filter which matches on \payload-protocol\ packets are permitted instead of rejected. This happens because the payload-protocol match criteria is not supported in the kernel filter causing it to accept all packets without taking any other action. As a fix the payload-protocol match will be treated the same as a ext-header\ match to avoid this filter bypass.

This issue doesn’t affect IPv4 firewall filters.

This issue affects Juniper Networks Junos OS on MX Series and EX9200 Series:

All versions earlier than 20.4R3-S7;
21.1 versions earlier than 21.1R3-S5;
21.2 versions earlier than 21.2R3-S5;
21.3 versions earlier than 21.3R3-S4;
21.4 versions earlier than 21.4R3-S4;
22.1 versions earlier than 22.1R3-S2;
22.2 versions earlier than 22.2R3-S2;
22.3 versions earlier than 22.3R2-S2 22.3R3;
22.4 versions earlier than 22.4R1-S2 22.4R2-S2 22.4R3.

Reference

https://supportportal.juniper.net/JSA75748 https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N