CVE-2023-44175

A Reachable Assertion vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows to send specific genuine PIM packets to the device resulting in rpd to crash causing a Denial of Service (DoS).

Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.

Note: This issue is not noticed when all the devices in the network are Juniper devices.

This issue affects Juniper Networks:

Junos OS:

• All versions prior to 20.4R3-S7;
• 21.2 versions prior to 21.2R3-S5;
• 21.3 versions prior to 21.3R3-S4;
• 21.4 versions prior to 21.4R3-S4;
• 22.1 versions prior to 22.1R3-S4;
• 22.2 versions prior to 22.2R3;
• 22.3 versions prior to 22.3R3;
• 22.4 versions prior to 22.4R3.

Junos OS Evolved:

• All versions prior to 22.3R3-EVO;
• 22.4-EVO versions prior to 22.4R3-EVO;
• 23.2-EVO versions prior to 23.2R1-EVO.

Weakness

The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.

Affected Software

Extended Description

While assertion is good for catching logic errors and reducing the chances of reaching more serious vulnerability conditions, it can still lead to a denial of service. For example, if a server handles multiple simultaneous connections, and an assert() occurs in one single connection that causes all other connections to be dropped, this is a reachable assertion that leads to a denial of service.

Potential Mitigations

References

• https://supportportal.juniper.net/JSA73141
• https://supportportal.juniper.net/JSA73141