CVE-2021-42143 Denial of service in n/a
Remote attackers can cause denial of service and disclose sensitive information by sending malformed ClientHello messages to Contiki-NG tinyDTLS.
- 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-2021-42143?
CVE-2021-42143 is a critical denial of service vulnerability in n/a, published on 24 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in Contiki-NG tinyDTLS through master branch 53a0d97. An infinite loop bug exists during the handling of a ClientHello handshake message. This bug allows remote attackers to cause a denial of service by sending a malformed ClientHello handshake message with an odd length of cipher suites, which triggers an infinite loop (consuming all resources) and a buffer over-read that can disclose sensitive information.
Weakness: CWE-835
Which versions are affected by CVE-2021-42143?
It affects 1 product.
Products include Contiki-Ng Tinydtls.
How do I fix CVE-2021-42143?
No fix has been published for CVE-2021-42143 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-2021-42143 being exploited?
There is no known exploitation of CVE-2021-42143 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-23p4-xxgc-xqvf.