CVE-2019-5143 Memory corruption in Moxa
A format string vulnerability in Moxa AWK-3131A firmware allows authenticated low-privilege users to achieve remote code execution via a crafted time server entry.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-5143?
CVE-2019-5143 is a high-severity memory corruption vulnerability in Moxa, published on 25 Feb 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An exploitable format string vulnerability exists in the iw_console conio_writestr functionality of the Moxa AWK-3131A firmware version 1.13. A specially crafted time server entry can cause an overflow of the time server buffer, resulting in remote code execution. An attacker can send commands while authenticated as a low privilege user to trigger this vulnerability.
Which versions are affected by CVE-2019-5143?
It affects 1 product.
Products include Moxa Awk-3131a Firmware.
How do I fix CVE-2019-5143?
No fix has been published for CVE-2019-5143 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-2019-5143 being exploited?
There is no known exploitation of CVE-2019-5143 in the wild and no public exploit code.
Other vulnerabilities in Moxa
Sources
Also known as GHSA-vmhm-f3xf-hv75.