CVE-2024-23923 Alpine Halo9 prh_l2_sar_data_ind Use-After-Free Remote Code Execution Vulnerability

High 8.8 Published 28 Sep 2024 Updated 3 Oct 2024

Network-adjacent attackers can execute arbitrary code with root privileges on Alpine Halo9 devices via a use-after-free flaw in the prh_l2_sar_data_ind function.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2024-23923?

CVE-2024-23923 is a high-severity use after free vulnerability in Alpine Halo9, published on 28 Sep 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Alpine Halo9 prh_l2_sar_data_ind Use-After-Free Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Alpine Halo9 devices. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the prh_l2_sar_data_ind function. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of root.

Was ZDI-CAN-22945

Weakness: CWE-416

Which versions are affected by CVE-2024-23923?

It affects 1 product.

Products include Alpsalpine Ilx-F509 Firmware.

How do I fix CVE-2024-23923?

No fix has been published for CVE-2024-23923 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2024-23923 being exploited?

There is no known exploitation of CVE-2024-23923 in the wild and no public exploit code.

Sources

Also known as GHSA-4grv-37wf-jg36.