CVE-2021-20599
Mitsubishi MELSEC iQ-R Cleartext Authentication Bypass
Description
Cleartext Transmission of Sensitive InformationCleartext transmission of sensitive information vulnerability in MELSEC iQ-R series Safety CPU R08/16/32/120SFCPU firmware versions "26" and prior and MELSEC iQ-R series SIL2 Process CPU R08/16/32/120PSFCPU firmware versions "11" and prior allows a remote unauthenticated attacker to login to a target CPU module by obtaining credentials other than password.
INFO
Published Date :
Oct. 14, 2021, 3:15 p.m.
Last Modified :
April 18, 2024, 6:15 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.2
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2021-20599 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2021-20599
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-20599.
| URL | Resource |
|---|---|
| https://jvn.jp/vu/JVNVU98578731 | Third Party Advisory |
| https://www.cisa.gov/uscert/ics/advisories/icsa-21-287-03 | |
| https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-011_en.pdf | Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Tools to dissect the Mitsubishi Electric MELSOFT protocol and warn on potential attacks related with the authentication and authorization stages.
Lua
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-20599 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-20599 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Apr. 18, 2024
Action Type Old Value New Value Changed Description Cleartext transmission of sensitive information vulnerability in MELSEC iQ-R series Safety CPU R08/16/32/120SFCPU firmware versions "26" and prior and MELSEC iQ-R series SIL2 Process CPU R08/16/32/120PSFCPU all versions allows a remote unauthenticated attacker to login to a target CPU module by obtaining credentials other than password. Cleartext Transmission of Sensitive InformationCleartext transmission of sensitive information vulnerability in MELSEC iQ-R series Safety CPU R08/16/32/120SFCPU firmware versions "26" and prior and MELSEC iQ-R series SIL2 Process CPU R08/16/32/120PSFCPU firmware versions "11" and prior allows a remote unauthenticated attacker to login to a target CPU module by obtaining credentials other than password. Added CWE Mitsubishi Electric Corporation CWE-319 Added CVSS V3.1 Mitsubishi Electric Corporation AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N -
CVE Modified by [email protected]
Oct. 14, 2022
Action Type Old Value New Value Changed Description Authorization bypass through user-controlled key vulnerability in MELSEC iQ-R series Safety CPU R08/16/32/120SFCPU all versions and MELSEC iQ-R series SIL2 Process CPU R08/16/32/120PSFCPU all versions allows an remote unauthenticated attacker to login to a target CPU module by obtaining credentials other than password. Cleartext transmission of sensitive information vulnerability in MELSEC iQ-R series Safety CPU R08/16/32/120SFCPU firmware versions "26" and prior and MELSEC iQ-R series SIL2 Process CPU R08/16/32/120PSFCPU all versions allows a remote unauthenticated attacker to login to a target CPU module by obtaining credentials other than password. Added Reference https://www.cisa.gov/uscert/ics/advisories/icsa-21-287-03 [No Types Assigned] -
CWE Remap by [email protected]
May. 03, 2022
Action Type Old Value New Value Changed CWE CWE-863 CWE-639 -
Initial Analysis by [email protected]
Oct. 20, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Changed Reference Type https://jvn.jp/vu/JVNVU98578731 No Types Assigned https://jvn.jp/vu/JVNVU98578731 Third Party Advisory Changed Reference Type https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-011_en.pdf No Types Assigned https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-011_en.pdf Vendor Advisory Added CWE NIST CWE-863 Added CPE Configuration AND OR *cpe:2.3:o:mitsubishielectric:r08sfcpu_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:mitsubishielectric:r08sfcpu:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:mitsubishielectric:r16sfcpu_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:mitsubishielectric:r16sfcpu:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:mitsubishielectric:r32sfcpu_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:mitsubishielectric:r32sfcpu:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:mitsubishielectric:r120sfcpu_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:mitsubishielectric:r120sfcpu:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:mitsubishielectric:r08psfcpu_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:mitsubishielectric:r08psfcpu:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:mitsubishielectric:r16psfcpu_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:mitsubishielectric:r16psfcpu:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:mitsubishielectric:r32psfcpu_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:mitsubishielectric:r32psfcpu:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:mitsubishielectric:r120psfcpu_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:mitsubishielectric:r120psfcpu:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-20599 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-20599
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.30 }} 0.03%
score
0.69495
percentile