CVE-2021-40540 Null dereference in n/a
A null pointer dereference in the Ulfius HTTP Framework allows attackers to cause a denial of service via malformed HTTP requests.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-40540?
CVE-2021-40540 is a critical vulnerability in n/a, published on 7 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
ulfius_uri_logger in Ulfius HTTP Framework before 2.7.4 omits con_info initialization and a con_info->request NULL check for certain malformed HTTP requests.
Which versions are affected by CVE-2021-40540?
It affects 1 product.
Linux distribution packages (1)
ulfius openSUSE:Tumbleweed | All versions | 2.7.4-1.2 |
Products include Ulfius Project Ulfius.
How do I fix CVE-2021-40540?
Upgrade to a fixed version.
Is CVE-2021-40540 being exploited?
There is no known exploitation of CVE-2021-40540 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2021-40540, GHSA-jr28-h3mc-x46r, UBUNTU-CVE-2021-40540, openSUSE-SU-2024:11481-1.