CVE-2021-34798 NULL pointer dereference in httpd core
Malformed requests cause a NULL pointer dereference in Apache HTTP Server, leading to a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-34798?
CVE-2021-34798 is a high-severity vulnerability in Apache Http Server, published on 16 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Malformed requests may cause the server to dereference a NULL pointer. This issue affects Apache HTTP Server 2.4.48 and earlier.
Weakness: CWE-476
Which versions are affected by CVE-2021-34798?
1 open source package ship an affected version, including apache. It affects 18 products.
| Package | Affected | Fixed in |
|---|---|---|
apache Bitnami | All versions | 2.4.49 |
Products include Apache Http Server, Broadcom Brocade Fabric Operating System Firmware, Debian Debian Linux, Fedoraproject Fedora, Netapp Cloud Backup, Netapp Clustered Data Ontap and 12 more.
How do I fix CVE-2021-34798?
Upgrade apache to 2.4.49 or later.
Is CVE-2021-34798 being exploited?
There is no known exploitation of CVE-2021-34798 in the wild and no public exploit code.
Other vulnerabilities in Apache Http Server
Sources
Also known as ALPINE-CVE-2021-34798, AZL-6484, BIT-apache-2021-34798, CLEANSTART-2026-QJ65507, DEBIAN-CVE-2021-34798, GHSA-6cg7-x9gh-4wf6 and 1 more.