CVE-2023-37459 Out-of-bounds read when processing a received IPv6 packet
An attacker can cause an out-of-bounds read in Contiki-NG by sending a truncated TCP packet, potentially leading to crashes or data exposure.
- 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-2023-37459?
CVE-2023-37459 is a medium-severity memory corruption vulnerability in contiki-ng, published on 15 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Contiki-NG is an operating system for internet-of-things devices. In versions 4.9 and prior, when a packet is received, the Contiki-NG network stack attempts to start the periodic TCP timer if it is a TCP packet with the SYN flag set. But the implementation does not first verify that a full TCP header has been received. Specifically, the implementation attempts to access the flags field from the TCP buffer in the following conditional expression in the `check_for_tcp_syn` function. For this reason, an attacker can inject a truncated TCP packet, which will lead to an out-of-bound read from the packet buffer. As of time of publication, a patched version is not available. As a workaround, one can apply the changes in Contiki-NG pull request #2510 to patch the system.
Weakness: CWE-125
Which versions are affected by CVE-2023-37459?
It affects 1 product.
Products include Contiki-Ng Contiki-Ng.
How do I fix CVE-2023-37459?
No fix has been published for CVE-2023-37459 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2023-37459 being exploited?
There is no known exploitation of CVE-2023-37459 in the wild and no public exploit code.
Other vulnerabilities in contiki-ng
Sources
Also known as GHSA-6648-m23r-hq8c.