CVE-2021-20589: Buffer Overflow
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.
Affected Software
Event History
Frequently Asked Questions
What is CVE-2021-20589?
CVE-2021-20589 is a buffer access with incorrect length value vulnerability in Mitsubishi GT2000 series GT27, GT25, GT23, and GT21 model communication drivers.
What is the severity of CVE-2021-20589?
CVE-2021-20589 has a severity score of 7.5 (high).
Which software versions are affected by CVE-2021-20589?
CVE-2021-20589 affects 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.
How can I fix CVE-2021-20589?
To fix CVE-2021-20589, it is recommended to update the Mitsubishi GT2000 series GT27, GT25, GT23, and GT21 model communication drivers to versions that are not affected by the vulnerability.
Where can I find more information about CVE-2021-20589?
More information about CVE-2021-20589 can be found at the following references: [CVE-2021-20589](https://jvn.jp/vu/JVNVU99895108/index.html), [Mitsubishi Electric PSIRT Vulnerability PDF](https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-002_en.pdf).