CVE-2020-5140 Denial of service in SonicOS
Remote unauthenticated attackers can cause a denial of service and leak memory addresses in the SonicOS SSLVPN service via malicious HTTP requests.
- 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-2020-5140?
CVE-2020-5140 is a high-severity denial of service 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 vulnerability in SonicOS allows a remote unauthenticated attacker to cause Denial of Service (DoS) on the firewall SSLVPN service by sending a malicious HTTP request that leads to memory addresses leak. This vulnerability affected SonicOS Gen 5 version 5.9.1.7, 5.9.1.13, Gen 6 version 6.5.4.7, 6.5.1.12, 6.0.5.3, SonicOSv 6.5.4.v and Gen 7 version SonicOS 7.0.0.0.
Weakness: CWE-125
Which versions are affected by CVE-2020-5140?
It affects 2 products.
Products include Sonicwall Sonicos, Sonicwall Sonicosv.
How do I fix CVE-2020-5140?
No fix has been published for CVE-2020-5140 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-5140 being exploited?
There is no known exploitation of CVE-2020-5140 in the wild and no public exploit code.
Other vulnerabilities in Sonicwall Sonicos
Sources
Also known as GHSA-xv6m-x759-j99f.