CVE-2020-13111 Denial of service in n/a
Remote attackers can crash NaviServer by sending crafted chunked-transfer requests that trigger a negative size in memmove.
- 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-2020-13111?
CVE-2020-13111 is a high-severity denial of service vulnerability in n/a, published on 16 May 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
NaviServer 4.99.4 to 4.99.19 allows denial of service due to the nsd/driver.c ChunkedDecode function not properly validating the length of a chunk. A remote attacker can craft a chunked-transfer request that will result in a negative value being passed to memmove via the size parameter, causing the process to crash.
Which versions are affected by CVE-2020-13111?
It affects 1 product.
Products include Naviserver Project Naviserver.
How do I fix CVE-2020-13111?
No fix has been published for CVE-2020-13111 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-13111 being exploited?
There is no known exploitation of CVE-2020-13111 in the wild and no public exploit code.
Sources
Also known as GHSA-v99v-qgch-h5q5.