CVE-2020-7486 Denial of service in Tricon TCM Model 4351, 4352, 4351A/B, 4352A/B (v10.3.x, v10.4.x)
High network load causes Tricon TCM modules to reset, leading to denial of service in industrial control systems.
- 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-2020-7486?
CVE-2020-7486 is a high-severity denial of service vulnerability in Tricon TCM Model 4351, 4352, 4351A/B, 4352A/B (v10.3.x, v10.4.x), published on 15 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
**VERSION NOT SUPPORTED WHEN ASSIGNED** A vulnerability could cause TCM modules to reset when under high network load in TCM v10.4.x and in system v10.3.x. This vulnerability was discovered and remediated in version v10.5.x on August 13, 2009. TCMs from v10.5.x and on will no longer exhibit this behavior.
Weakness: CWE-400
Which versions are affected by CVE-2020-7486?
It affects 6 products.
Products include Schneider-Electric Tricon Tcm 4351 Firmware, Schneider-Electric Tricon Tcm 4351a Firmware, Schneider-Electric Tricon Tcm 4351b Firmware, Schneider-Electric Tricon Tcm 4352 Firmware, Schneider-Electric Tricon Tcm 4352a Firmware, Schneider-Electric Tricon Tcm 4352b Firmware.
How do I fix CVE-2020-7486?
No fix has been published for CVE-2020-7486 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-2020-7486 being exploited?
There is no known exploitation of CVE-2020-7486 in the wild and no public exploit code.
Other vulnerabilities in Tricon TCM Model 4351, 4352, 4351A/B, 4352A/B (v10.3.x, v10.4.x)
Sources
Also known as GHSA-vxcj-679q-r6q8.