CVE-2020-5135 SonicWall SonicOS Buffer Overflow
Remote attackers can cause denial of service or execute arbitrary code on SonicWall firewalls via a buffer overflow in SonicOS.
- Exploited in the wild
- Since 15 Mar 2022
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-5135?
CVE-2020-5135 is a critical memory corruption vulnerability in Sonicwall Sonicos, published on 12 Oct 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A buffer overflow vulnerability in SonicOS allows a remote attacker to cause Denial of Service (DoS) and potentially execute arbitrary code by sending a malicious request to the firewall. This vulnerability affected SonicOS Gen 6 version 6.5.4.7, 6.5.1.12, 6.0.5.3, SonicOSv 6.5.4.v and Gen 7 version 7.0.0.0.
Weakness: CWE-120
Which versions are affected by CVE-2020-5135?
It affects 2 products.
Products include Sonicwall Sonicos, Sonicwall Sonicosv.
How do I fix CVE-2020-5135?
No fix has been published for CVE-2020-5135 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 5 Apr 2022.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2020-5135 being exploited?
Yes. Attackers have exploited CVE-2020-5135 in the wild since at least 15 Mar 2022, including in ransomware campaigns.
Other vulnerabilities in Sonicwall Sonicos
Sources
Also known as GHSA-vw5m-894x-7rp4.