CVE-2021-33056 Denial of service in n/a
An attacker can crash the application by sending a SIP message with an invalid From header, affecting users of the Belle-sip library.
- 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-2021-33056?
CVE-2021-33056 is a high-severity denial of service vulnerability in n/a, published on 12 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Belledonne Belle-sip before 4.5.20, as used in Linphone and other products, can crash via an invalid From header in a SIP message.
Weakness: CWE-444
Which versions are affected by CVE-2021-33056?
It affects 1 product.
Products include Linphone Belle-Sip.
How do I fix CVE-2021-33056?
No fix has been published for CVE-2021-33056 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-2021-33056 being exploited?
There is no known exploitation of CVE-2021-33056 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-jw78-2435-w3r6, UBUNTU-CVE-2021-33056.