Vulnerability Details : CVE-2021-20592
Missing synchronization vulnerability in GOT2000 series GT27 model communication driver versions 01.19.000 through 01.39.010, GT25 model communication driver versions 01.19.000 through 01.39.010 and GT23 model communication driver versions 01.19.000 through 01.39.010 and GT SoftGOT2000 versions 1.170C through 1.256S allows a remote unauthenticated attacker to cause DoS condition on the MODBUS/TCP slave communication function of the products by rapidly and repeatedly connecting and disconnecting to and from the MODBUS/TCP communication port on a target. Restart or reset is required to recover.
Vulnerability category: Denial of service
Products affected by CVE-2021-20592
- Mitsubishielectric » Gt Softgot2000Versions from including (>=) 1.170c and up to, including, (<=) 1.256scpe:2.3:a:mitsubishielectric:gt_softgot2000:*:*:*:*:*:*:*:*
- Mitsubishielectric » Got2000 Gt27 FirmwareVersions from including (>=) 01.19.000 and up to, including, (<=) 01.39.010cpe:2.3:o:mitsubishielectric:got2000_gt27_firmware:*:*:*:*:*:*:*:*
- Mitsubishielectric » Got2000 Gt25 FirmwareVersions from including (>=) 01.19.000 and up to, including, (<=) 01.39.010cpe:2.3:o:mitsubishielectric:got2000_gt25_firmware:*:*:*:*:*:*:*:*
- Mitsubishielectric » Got2000 Gt23 FirmwareVersions from including (>=) 01.19.000 and up to, including, (<=) 01.39.010cpe:2.3:o:mitsubishielectric:got2000_gt23_firmware:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-20592
0.25%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 64 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-20592
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
7.8
|
HIGH | AV:N/AC:L/Au:N/C:N/I:N/A:C |
10.0
|
6.9
|
NIST | |
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2021-20592
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The product utilizes multiple threads or processes to allow temporary access to a shared resource that can only be exclusive to one process at a time, but it does not properly synchronize these actions, which might cause simultaneous accesses of this resource by multiple threads or processes.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-20592
-
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-007_en.pdf
Vendor Advisory
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https://jvn.jp/vu/JVNVU92414172/index.html
JVNVU#92414172: 三菱電機製 GOT の MODBUS/TCP スレーブ通信機能における共有リソースへのアクセス同期不備の脆弱性Third Party Advisory
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