NVD Vulnerability Detail
Search Exploit, PoC
CVE-2020-27866
Summary

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11355.

Publication Date Feb. 12, 2021, 9:15 a.m.
Registration Date Feb. 12, 2021, 12:01 p.m.
Last Update Nov. 21, 2024, 2:21 p.m.
CVSS3.1 : HIGH
スコア 8.8
Vector CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
攻撃元区分(AV) 隣接
攻撃条件の複雑さ(AC) 低
攻撃に必要な特権レベル(PR) 不要
利用者の関与(UI) 不要
影響の想定範囲(S) 変更なし
機密性への影響(C) 高
完全性への影響(I) 高
可用性への影響(A) 高
CVSS2.0 : HIGH
Score 8.3
Vector AV:A/AC:L/Au:N/C:C/I:C/A:C
攻撃元区分(AV) 隣接
攻撃条件の複雑さ(AC) 低
攻撃前の認証要否(Au) 不要
機密性への影響(C) 高
完全性への影響(I) 高
可用性への影響(A) 高
Get all privileges. いいえ
Get user privileges いいえ
Get other privileges いいえ
User operation required いいえ
Affected software configurations
Configuration1 or higher or less more than less than
cpe:2.3:o:netgear:ac2100_firmware:*:*:*:*:*:*:*:* 1.2.0.76
execution environment
1 cpe:2.3:h:netgear:ac2100:-:*:*:*:*:*:*:*
Configuration2 or higher or less more than less than
cpe:2.3:o:netgear:ac2400_firmware:*:*:*:*:*:*:*:* 1.2.0.76
execution environment
1 cpe:2.3:h:netgear:ac2400:-:*:*:*:*:*:*:*
Configuration3 or higher or less more than less than
cpe:2.3:o:netgear:ac2600_firmware:*:*:*:*:*:*:*:* 1.2.0.76
execution environment
1 cpe:2.3:h:netgear:ac2600:-:*:*:*:*:*:*:*
Configuration4 or higher or less more than less than
cpe:2.3:o:netgear:r6700_firmware:*:*:*:*:*:*:*:* 1.2.0.76
execution environment
1 cpe:2.3:h:netgear:r6700:v2:*:*:*:*:*:*:*
Configuration5 or higher or less more than less than
cpe:2.3:o:netgear:r6800_firmware:*:*:*:*:*:*:*:* 1.2.0.76
execution environment
1 cpe:2.3:h:netgear:r6800:-:*:*:*:*:*:*:*
Configuration6 or higher or less more than less than
cpe:2.3:o:netgear:r6900_firmware:*:*:*:*:*:*:*:* 1.2.0.76
execution environment
1 cpe:2.3:h:netgear:r6900:v2:*:*:*:*:*:*:*
Configuration7 or higher or less more than less than
cpe:2.3:o:netgear:r7200_firmware:*:*:*:*:*:*:*:* 1.2.0.76
execution environment
1 cpe:2.3:h:netgear:r7200:-:*:*:*:*:*:*:*
Configuration8 or higher or less more than less than
cpe:2.3:o:netgear:r7350_firmware:*:*:*:*:*:*:*:* 1.2.0.76
execution environment
1 cpe:2.3:h:netgear:r7350:-:*:*:*:*:*:*:*
Configuration9 or higher or less more than less than
cpe:2.3:o:netgear:r7400_firmware:*:*:*:*:*:*:*:* 1.2.0.76
execution environment
1 cpe:2.3:h:netgear:r7400:-:*:*:*:*:*:*:*
Configuration10 or higher or less more than less than
cpe:2.3:o:netgear:r7450_firmware:*:*:*:*:*:*:*:* 1.2.0.76
execution environment
1 cpe:2.3:h:netgear:r7450:-:*:*:*:*:*:*:*
Configuration11 or higher or less more than less than
cpe:2.3:o:netgear:r6220_firmware:*:*:*:*:*:*:*:* 1.1.0.104
execution environment
1 cpe:2.3:h:netgear:r6220:-:*:*:*:*:*:*:*
Configuration12 or higher or less more than less than
cpe:2.3:o:netgear:r6230_firmware:*:*:*:*:*:*:*:* 1.1.0.104
execution environment
1 cpe:2.3:h:netgear:r6230:-:*:*:*:*:*:*:*
Configuration13 or higher or less more than less than
cpe:2.3:o:netgear:r6260_firmware:*:*:*:*:*:*:*:* 1.1.0.78
execution environment
1 cpe:2.3:h:netgear:r6260:-:*:*:*:*:*:*:*
Configuration14 or higher or less more than less than
cpe:2.3:o:netgear:r6330_firmware:*:*:*:*:*:*:*:* 1.1.0.78
execution environment
1 cpe:2.3:h:netgear:r6330:-:*:*:*:*:*:*:*
Configuration15 or higher or less more than less than
cpe:2.3:o:netgear:r6350_firmware:*:*:*:*:*:*:*:* 1.1.0.78
execution environment
1 cpe:2.3:h:netgear:r6350:-:*:*:*:*:*:*:*
Configuration16 or higher or less more than less than
cpe:2.3:o:netgear:r6850_firmware:*:*:*:*:*:*:*:* 1.1.0.78
execution environment
1 cpe:2.3:h:netgear:r6850:-:*:*:*:*:*:*:*
Configuration17 or higher or less more than less than
cpe:2.3:o:netgear:r6120_firmware:*:*:*:*:*:*:*:* 1.0.0.76
execution environment
1 cpe:2.3:h:netgear:r6120:-:*:*:*:*:*:*:*
Configuration18 or higher or less more than less than
cpe:2.3:o:netgear:r6020_firmware:*:*:*:*:*:*:*:* 1.0.0.48
execution environment
1 cpe:2.3:h:netgear:r6020:-:*:*:*:*:*:*:*
Configuration19 or higher or less more than less than
cpe:2.3:o:netgear:r6080_firmware:*:*:*:*:*:*:*:* 1.0.0.48
execution environment
1 cpe:2.3:h:netgear:r6080:-:*:*:*:*:*:*:*
Related information, measures and tools
Common Vulnerabilities List
JVN Vulnerability Information
複数の NETGEAR 製品における認証に関する脆弱性
Title 複数の NETGEAR 製品における認証に関する脆弱性
Summary

複数の NETGEAR 製品には、認証に関する脆弱性が存在します。 Zero Day Initiative は、本脆弱性に ZDI-CAN-11355 を採番していました。

Possible impacts 情報を取得される、情報を改ざんされる、およびサービス運用妨害 (DoS) 状態にされる可能性があります。
Solution

ベンダより正式な対策が公開されています。ベンダ情報を参照して適切な対策を実施してください。
Publication Date Dec. 16, 2020, midnight
Registration Date Oct. 29, 2021, 6:02 p.m.
Last Update Oct. 29, 2021, 6:02 p.m.
Affected System
ネットギア
AC2100 ファームウェア 
AC2400 ファームウェア 
AC2600 ファームウェア 
R6700 ファームウェア 
R6800 ファームウェア 
R6900 ファームウェア 
R7200 ファームウェア 
R7350 ファームウェア 
R7400 ファームウェア 
R7450 ファームウェア 
CVE (情報セキュリティ 共通脆弱性識別子)
CWE (共通脆弱性タイプ一覧)
ベンダー情報
その他
Change Log
No Changed Details Date of change
1 [2021年10月29日]
  掲載		 Oct. 29, 2021, 6:02 p.m.