CVE-2021-42074 Use after free in n/a
An unauthenticated attacker can crash the Barrier server by rapidly opening and closing TCP connections, causing a segmentation fault.
- 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-2021-42074?
CVE-2021-42074 is a high-severity use after free vulnerability in n/a, published on 8 Nov 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in Barrier before 2.3.4. An unauthenticated attacker can cause a segmentation fault in the barriers component (aka the server-side implementation of Barrier) by quickly opening and closing TCP connections while sending a Hello message for each TCP session.
Weakness: CWE-416
Which versions are affected by CVE-2021-42074?
It affects 1 product.
Products include Barrier Project Barrier.
How do I fix CVE-2021-42074?
No fix has been published for CVE-2021-42074 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2021-42074 being exploited?
There is no known exploitation of CVE-2021-42074 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-97hp-rfmm-2c7w.