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cvelistZdiCVELIST:CVE-2020-27867
HistoryFeb 11, 2021 - 11:35 p.m.

CVE-2020-27867

2021-02-1123:35:40
CWE-77
zdi
www.cve.org
4
vulnerability
netgear
routers
arbitrary code execution
authentication bypass
mini_httpd
system call

CVSS3

6.8

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS

0.001

Percentile

17.9%

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. When parsing the funjsq_access_token parameter, the process does not properly validate a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-11653.

CNA Affected

[
  {
    "product": "Multiple Routers",
    "vendor": "NETGEAR",
    "versions": [
      {
        "status": "affected",
        "version": "firmware version 1.2.0.62_1.0.1"
      }
    ]
  }
]

CVSS3

6.8

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS

0.001

Percentile

17.9%

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