CVE-2021-40900 Denial of service in n/a
Attackers can cause a denial of service in regexfn by submitting crafted invalid email addresses that trigger excessive CPU consumption.
- 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-2021-40900?
CVE-2021-40900 is a high-severity denial of service vulnerability in n/a, published on 27 Jun 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in regexfn v1.0.5 when validating crafted invalid emails.
Weakness: CWE-1333
Which versions are affected by CVE-2021-40900?
It affects 1 product.
Products include Regexfn Project Regexfn.
How do I fix CVE-2021-40900?
No fix has been published for CVE-2021-40900 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-2021-40900 being exploited?
There is no known exploitation of CVE-2021-40900 in the wild and no public exploit code.
Sources
Also known as GHSA-6m39-m6c5-cfp9.