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ZdiCVELIST:CVE-2021-27254

HistoryMar 05, 2021 - 8:00 p.m.

CVE-2021-27254

2021-03-0520:00:23

CWE-259

zdi

www.cve.org

netgear r7800

unauthorized access

authentication bypass

apply_save.cgi

hard-coded encryption key

arbitrary code execution

zdi-can-12287.

CVSS3

6.3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

LOW

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

EPSS

0.002

Percentile

53.1%

JSON

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R7800. Authentication is not required to exploit this vulnerability. The specific flaw exists within the apply_save.cgi endpoint. This issue results from the use of hard-coded encryption key. An attacker can leverage this vulnerability to execute arbitrary code in the context of root. Was ZDI-CAN-12287.

CNA Affected

[
  {
    "product": "R7800",
    "vendor": "NETGEAR",
    "versions": [
      {
        "status": "affected",
        "version": "firmware version 1.0.2.76"
      }
    ]
  }
]

References

kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders

www.zerodayinitiative.com/advisories/ZDI-21-252/

CVSS3

6.3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

LOW

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

EPSS

0.002

Percentile

53.1%

JSON

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