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MitreCVE-2021-27710

HistoryApr 14, 2021 - 6:15 p.m.

CVE-2021-27710

2021-04-1418:15:14

CWE-78

mitre

web.nvd.nist.gov

cve-2021-27710

command injection

totolink x5000r

totolink a720r

router

firmware

remote attack

http request

glibc

os commands

security vulnerability

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

AI Score

9.9

Confidence

High

EPSS

0.03

Percentile

91.1%

JSON

Command Injection in TOTOLINK X5000R router with firmware v9.1.0u.6118_B20201102, and TOTOLINK A720R router with firmware v4.1.5cu.470_B20200911 allows remote attackers to execute arbitrary OS commands by sending a modified HTTP request. This occurs because the function executes glibc’s system function with untrusted input. In the function, “ip” parameter is directly passed to the attacker, allowing them to control the “ip” field to attack the OS.

Affected configurations

Nvd

Node

totolinkx5000r_firmwareMatch9.1.0u.6118_b20201102

AND

totolinkx5000rMatch-

Node

totolinka720r_firmwareMatch4.1.5cu.470_b20200911

AND

totolinka720rMatch-

VendorProductVersionCPE
totolinkx5000r_firmware9.1.0u.6118_b20201102cpe:2.3:o:totolink:x5000r_firmware:9.1.0u.6118_b20201102:*:*:*:*:*:*:*
totolinkx5000r-cpe:2.3:h:totolink:x5000r:-:*:*:*:*:*:*:*
totolinka720r_firmware4.1.5cu.470_b20200911cpe:2.3:o:totolink:a720r_firmware:4.1.5cu.470_b20200911:*:*:*:*:*:*:*
totolinka720r-cpe:2.3:h:totolink:a720r:-:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
totolink	x5000r_firmware	9.1.0u.6118_b20201102	cpe:2.3:o:totolink:x5000r_firmware:9.1.0u.6118_b20201102:::::::*
totolink	x5000r	-	cpe:2.3:h:totolink:x5000r:-:::::::*
totolink	a720r_firmware	4.1.5cu.470_b20200911	cpe:2.3:o:totolink:a720r_firmware:4.1.5cu.470_b20200911:::::::*
totolink	a720r	-	cpe:2.3:h:totolink:a720r:-:::::::*

References

hackmd.io/Hy3oVgtcQiuqAtv9FdylHw

hackmd.io/KjXzQdjDRjOuRjoZZXQo_A

Social References

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

AI Score

9.9

Confidence

High

EPSS

0.03

Percentile

91.1%

JSON

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