CVE-2023-22416 Memory corruption in Junos OS

High 7.5 Published 12 Jan 2023 Updated 8 Apr 2025

A buffer overflow in SIP ALG allows unauthenticated attackers to crash the flow processing daemon, causing denial of service on MX and SRX devices.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-22416?

CVE-2023-22416 is a high-severity memory corruption vulnerability in Juniper Junos, published on 12 Jan 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A Buffer Overflow vulnerability in SIP ALG of Juniper Networks Junos OS allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS). On all MX Series and SRX Series platform with SIP ALG enabled, when a malformed SIP packet is received, the flow processing daemon (flowd) will crash and restart. This issue affects: Juniper Networks Junos OS on MX Series and SRX Series 20.4 versions prior to 20.4R3-S5; 21.1 versions prior to 21.1R3-S4; 21.2 versions prior to 21.2R3-S2; 21.3 versions prior to 21.3R3-S1; 21.4 versions prior to 21.4R3; 22.1 versions prior to 22.1R1-S2, 22.1R2; 22.2 versions prior to 22.2R1-S1, 22.2R2. This issue does not affect Juniper Networks Junos OS versions prior to 20.4R1 on SRX Series.

Weakness: CWE-120

Which versions are affected by CVE-2023-22416?

It affects 1 product.

Products include Juniper Junos.

How do I fix CVE-2023-22416?

No fix has been published for CVE-2023-22416 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2023-22416 being exploited?

There is no known exploitation of CVE-2023-22416 in the wild and no public exploit code.

All Juniper Junos vulnerabilities

Sources

Also known as GHSA-5wrm-66q7-p29x.