CVE-2018-19791 Denial of service in n/a
An attacker can cause denial of service in OpenLiteSpeed by exploiting improper handling of HTTP Range headers to amplify response sizes.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-19791?
CVE-2018-19791 is a medium-severity denial of service vulnerability in n/a, published on 3 Dec 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The server in LiteSpeed OpenLiteSpeed before 1.5.0 RC6 does not correctly handle requests for byte sequences, allowing an attacker to amplify the response size by requesting the entire response body repeatedly, as demonstrated by an HTTP Range header value beginning with the "bytes=0-,0-" substring.
Weakness: CWE-20
Which versions are affected by CVE-2018-19791?
It affects 1 product.
Products include Litespeedtech Openlitespeed.
How do I fix CVE-2018-19791?
No fix has been published for CVE-2018-19791 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-2018-19791 being exploited?
There is no known exploitation of CVE-2018-19791 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-p7xx-c3fx-mhqh.