CVE-2021-20589 Denial of service in GOT2000 series; GOT SIMPLE series; GT SoftGOT2000; Tension Controller
Remote unauthenticated attackers can stop communication functions in Mitsubishi GOT and Tension Controller devices via crafted packets.
- 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-2021-20589?
CVE-2021-20589 is a high-severity denial of service vulnerability in GOT2000 series; GOT SIMPLE series; GT SoftGOT2000; Tension Controller, published on 19 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Buffer access with incorrect length value vulnerability in GOT2000 series GT27 model communication driver versions 01.19.000 through 01.38.000, GT25 model communication driver versions 01.19.000 through 01.38.000, GT23 model communication driver versions 01.19.000 through 01.38.000 and GT21 model communication driver versions 01.21.000 through 01.39.000, GOT SIMPLE series GS21 model communication driver versions 01.21.000 through 01.39.000, GT SoftGOT2000 versions 1.170C through 1.250L and Tension Controller LE7-40GU-L Screen package data for MODBUS/TCP V1.00 allows a remote unauthenticated attacker to stop the communication function of the products via specially crafted packets.
Weakness: CWE-119
Which versions are affected by CVE-2021-20589?
It affects 6 products.
Products include Mitsubishi Gs21 Firmware, Mitsubishi Gt21 Firmware, Mitsubishi Gt23 Firmware, Mitsubishi Gt25 Firmware, Mitsubishi Gt27 Firmware, Mitsubishi Gt Softgot2000 Firmware.
How do I fix CVE-2021-20589?
No fix has been published for CVE-2021-20589 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-2021-20589 being exploited?
There is no known exploitation of CVE-2021-20589 in the wild and no public exploit code.
Sources
Also known as GHSA-q2w2-jjv8-fvww.