CVE-2020-4839 Memory corruption in 8335-GCA
A remote privileged attacker can cause a denial of service via a stack-based buffer overflow in IBM Host firmware for LC-class systems.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-4839?
CVE-2020-4839 is a medium-severity memory corruption vulnerability in IBM 8335-GCA, published on 25 May 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
IBM Host firmware for LC-class Systems is vulnerable to a stack based buffer overflow, caused by improper bounds checking. A remote privileged attacker could exploit this vulnerability and cause a denial of service. IBM X-Force ID: 190037.
Weakness: CWE-787
Which versions are affected by CVE-2020-4839?
It affects 3 products.
Products include Ibm 8335-Gca Firmware, Ibm 8335-Gta Firmware, Ibm 8335-Gtb Firmware.
How do I fix CVE-2020-4839?
No fix has been published for CVE-2020-4839 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-2020-4839 being exploited?
There is no known exploitation of CVE-2020-4839 in the wild and no public exploit code.
Other vulnerabilities in IBM 8335-GCA
Sources
Also known as GHSA-wm8q-g9p3-9xhm.