CVE-2021-28362 Integer overflow in n/a

High 7.5 Published 24 Mar 2021 Updated 3 Aug 2024

An integer underflow in Contiki OS allows remote attackers to cause a denial of service via crafted IPv6 packets with invalid extension headers.

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-2021-28362?

CVE-2021-28362 is a high-severity vulnerability in n/a, published on 24 Mar 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 Contiki through 3.0. When sending an ICMPv6 error message because of invalid extension header options in an incoming IPv6 packet, there is an attempt to remove the RPL extension headers. Because the packet length and the extension header length are unchecked (with respect to the available data) at this stage, and these variables are susceptible to integer underflow, it is possible to construct an invalid extension header that will cause memory corruption issues and lead to a Denial-of-Service condition. This is related to rpl-ext-header.c.

Weakness: CWE-191

Which versions are affected by CVE-2021-28362?

It affects 1 product.

Products include Contiki-Os Contiki.

How do I fix CVE-2021-28362?

No fix has been published for CVE-2021-28362 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-28362 being exploited?

There is no known exploitation of CVE-2021-28362 in the wild and no public exploit code.

Sources

Also known as GHSA-pcjq-cmp7-76vx.