CVE-2020-9494 Denial of service in Apache Traffic Server
Attackers can cause Apache Traffic Server to consume excessive memory and CPU via malicious HTTP/2 headers, leading to service disruption.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-9494?
CVE-2020-9494 is a high-severity denial of service vulnerability in Apache Traffic Server, published on 24 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Apache Traffic Server 6.0.0 to 6.2.3, 7.0.0 to 7.1.10, and 8.0.0 to 8.0.7 is vulnerable to certain types of HTTP/2 HEADERS frames that can cause the server to allocate a large amount of memory and spin the thread.
Weakness: CWE-770
Which versions are affected by CVE-2020-9494?
It affects 2 products.
Products include Apache Traffic Server, Debian Debian Linux.
How do I fix CVE-2020-9494?
Upgrade to a fixed version.
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-2020-9494 being exploited?
There is no known exploitation of CVE-2020-9494 in the wild and no public exploit code.
Other vulnerabilities in Apache Traffic Server
Sources
Also known as DEBIAN-CVE-2020-9494, DSA-4710-1, GHSA-cw5m-934f-xqmc, UBUNTU-CVE-2020-9494.