CVE-2024-34161 NGINX HTTP/3 QUIC vulnerability
Attackers can leak previously freed memory from NGINX workers via crafted QUIC packets when HTTP/3 is enabled with large MTUs.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-34161?
CVE-2024-34161 is a medium-severity use after free vulnerability in Fedoraproject Fedora, published on 29 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
When NGINX Plus or NGINX OSS are configured to use the HTTP/3 QUIC module and the network infrastructure supports a Maximum Transmission Unit (MTU) of 4096 or greater without fragmentation, undisclosed QUIC packets can cause NGINX worker processes to leak previously freed memory.
Weakness: CWE-416
Which versions are affected by CVE-2024-34161?
2 open source packages ship an affected version, including nginx and nginx-gateway. It affects 3 products.
| Package | Affected | Fixed in |
|---|---|---|
nginx Bitnami | From 1.25.0 | 1.26.1 |
nginx-gateway Bitnami | From 1.25.0 | 1.26.1 |
Products include F5 Nginx Open Source, F5 Nginx Plus, Fedoraproject Fedora.
How do I fix CVE-2024-34161?
Upgrade nginx to 1.26.1 or later.
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-2024-34161 being exploited?
There is no known exploitation of CVE-2024-34161 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as BIT-nginx-2024-34161, BIT-nginx-gateway-2024-34161, DEBIAN-CVE-2024-34161.