CVE-2021-27420 : GE UR firmware versions prior to version 8.1x web server task does not properly

GE UR firmware versions prior to version 8.1x web server task does not properly handle receipt of unsupported HTTP verbs, resulting in the web server becoming temporarily unresponsive after receiving a series of unsupported HTTP requests. When unresponsive, the web server is inaccessible. By itself, this is not particularly significant as the relay remains effective in all other functionality and communication channels.

Published 2022-03-23 20:15:08

Updated 2022-04-01 18:25:20

Source ICS-CERT

View at NVD, CVE.org

Vulnerability category: Input validation

Products affected by CVE-2021-27420

GE » Multilin B30 Firmware
Versions before (<) 8.10
cpe:2.3:o:ge:multilin_b30_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: GE » Multilin B30 » Version: N/A
GE » Multilin B90 Firmware
Versions before (<) 8.10
cpe:2.3:o:ge:multilin_b90_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: GE » Multilin B90 » Version: N/A
GE » Multilin C60 Firmware
Versions before (<) 8.10
cpe:2.3:o:ge:multilin_c60_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: GE » Multilin C60 » Version: N/A
GE » Multilin C70 Firmware
Versions before (<) 8.10
cpe:2.3:o:ge:multilin_c70_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: GE » Multilin C70 » Version: N/A
GE » Multilin C95 Firmware
Versions before (<) 8.10
cpe:2.3:o:ge:multilin_c95_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: GE » Multilin C95 » Version: N/A
GE » Multilin D30 Firmware
Versions before (<) 8.10
cpe:2.3:o:ge:multilin_d30_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: GE » Multilin D30 » Version: N/A
GE » Multilin D60 Firmware
Versions before (<) 8.10
cpe:2.3:o:ge:multilin_d60_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: GE » Multilin D60 » Version: N/A
GE » Multilin F35 Firmware
Versions before (<) 8.10
cpe:2.3:o:ge:multilin_f35_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: GE » Multilin F35 » Version: N/A
GE » Multilin F60 Firmware
Versions before (<) 8.10
cpe:2.3:o:ge:multilin_f60_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: GE » Multilin F60 » Version: N/A
GE » Multilin G30 Firmware
Versions before (<) 8.10
cpe:2.3:o:ge:multilin_g30_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: GE » Multilin G30 » Version: N/A
GE » Multilin G60 Firmware
Versions before (<) 8.10
cpe:2.3:o:ge:multilin_g60_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: GE » Multilin G60 » Version: N/A
GE » Multilin L30 Firmware
Versions before (<) 8.10
cpe:2.3:o:ge:multilin_l30_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: GE » Multilin L30 » Version: N/A
GE » Multilin L60 Firmware
Versions before (<) 8.10
cpe:2.3:o:ge:multilin_l60_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: GE » Multilin L60 » Version: N/A
GE » Multilin L90 Firmware
Versions before (<) 8.10
cpe:2.3:o:ge:multilin_l90_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: GE » Multilin L90 » Version: N/A
GE » Multilin M60 Firmware
Versions before (<) 8.10
cpe:2.3:o:ge:multilin_m60_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: GE » Multilin M60 » Version: N/A
GE » Multilin N60 Firmware
Versions before (<) 8.10
cpe:2.3:o:ge:multilin_n60_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: GE » Multilin N60 » Version: N/A
GE » Multilin T35 Firmware
Versions before (<) 8.10
cpe:2.3:o:ge:multilin_t35_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: GE » Multilin T35 » Version: N/A
GE » Multilin T60 Firmware
Versions before (<) 8.10
cpe:2.3:o:ge:multilin_t60_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: GE » Multilin T60 » Version: N/A
GE » Multilin C30 Firmware
Versions before (<) 8.10
cpe:2.3:o:ge:multilin_c30_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: GE » Multilin C30 » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2021-27420

EPSS FAQ

0.09%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 38 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-27420

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
5.3	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	3.9	1.4	ICS-CERT
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: Low
5.3	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	3.9	1.4	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: Low

CWE ids for CVE-2021-27420

CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Assigned by:
- ics-cert@hq.dhs.gov (Secondary)
- nvd@nist.gov (Primary)

References for CVE-2021-27420

https://www.cisa.gov/uscert/ics/advisories/icsa-21-075-02

GE UR family | CISA
Mitigation;Third Party Advisory;US Government Resource

CVEs referencing this url
https://www.gegridsolutions.com/Passport/Login.aspx

Grid Passport Login : GE Grid Solutions
Permissions Required;Vendor Advisory

CVEs referencing this url

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Vulnerability Details : CVE-2021-27420

Products affected by CVE-2021-27420

Exploit prediction scoring system (EPSS) score for CVE-2021-27420

CVSS scores for CVE-2021-27420

CWE ids for CVE-2021-27420

References for CVE-2021-27420