NVD Vulnerability Detail
Search Exploit, PoC
CVE-2021-27256
Summary

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 firmware version 1.0.2.76. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the handling of the rc_service parameter provided to apply_save.cgi. The issue results from the lack of proper validation of 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-12355.

Publication Date March 6, 2021, 5:15 a.m.
Registration Date March 6, 2021, 10:03 a.m.
Last Update Nov. 21, 2024, 2:57 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:br200_firmware:*:*:*:*:*:*:*:* 5.10.0.5
execution environment
1 cpe:2.3:h:netgear:br200:-:*:*:*:*:*:*:*
Configuration2 or higher or less more than less than
cpe:2.3:o:netgear:br500_firmware:*:*:*:*:*:*:*:* 5.10.0.5
execution environment
1 cpe:2.3:h:netgear:br500:-:*:*:*:*:*:*:*
Configuration3 or higher or less more than less than
cpe:2.3:o:netgear:d7800_firmware:*:*:*:*:*:*:*:* 1.0.1.60
execution environment
1 cpe:2.3:h:netgear:d7800:-:*:*:*:*:*:*:*
Configuration4 or higher or less more than less than
cpe:2.3:o:netgear:ex6100v2_firmware:*:*:*:*:*:*:*:* 1.0.1.98
execution environment
1 cpe:2.3:h:netgear:ex6100v2:-:*:*:*:*:*:*:*
Configuration5 or higher or less more than less than
cpe:2.3:o:netgear:ex6150v2_firmware:*:*:*:*:*:*:*:* 1.0.1.98
execution environment
1 cpe:2.3:h:netgear:ex6150v2:-:*:*:*:*:*:*:*
Configuration6 or higher or less more than less than
cpe:2.3:o:netgear:ex6250_firmware:*:*:*:*:*:*:*:* 1.0.0.134
execution environment
1 cpe:2.3:h:netgear:ex6250:-:*:*:*:*:*:*:*
Configuration7 or higher or less more than less than
cpe:2.3:o:netgear:ex6400_firmware:*:*:*:*:*:*:*:* 1.0.2.158
execution environment
1 cpe:2.3:h:netgear:ex6400:-:*:*:*:*:*:*:*
Configuration8 or higher or less more than less than
cpe:2.3:o:netgear:ex6400v2_firmware:*:*:*:*:*:*:*:* 1.0.0.134
execution environment
1 cpe:2.3:h:netgear:ex6400v2:-:*:*:*:*:*:*:*
Configuration9 or higher or less more than less than
cpe:2.3:o:netgear:ex6410_firmware:*:*:*:*:*:*:*:* 1.0.0.134
execution environment
1 cpe:2.3:h:netgear:ex6410:-:*:*:*:*:*:*:*
Configuration10 or higher or less more than less than
cpe:2.3:o:netgear:ex6420_firmware:*:*:*:*:*:*:*:* 1.0.0.134
execution environment
1 cpe:2.3:h:netgear:ex6420:-:*:*:*:*:*:*:*
Configuration11 or higher or less more than less than
cpe:2.3:o:netgear:ex7300_firmware:*:*:*:*:*:*:*:* 1.0.2.158
execution environment
1 cpe:2.3:h:netgear:ex7300:-:*:*:*:*:*:*:*
Configuration12 or higher or less more than less than
cpe:2.3:o:netgear:ex7300v2_firmware:*:*:*:*:*:*:*:* 1.0.0.134
execution environment
1 cpe:2.3:h:netgear:ex7300v2:-:*:*:*:*:*:*:*
Configuration13 or higher or less more than less than
cpe:2.3:o:netgear:ex7320_firmware:*:*:*:*:*:*:*:* 1.0.0.134
execution environment
1 cpe:2.3:h:netgear:ex7320:-:*:*:*:*:*:*:*
Configuration14 or higher or less more than less than
cpe:2.3:o:netgear:ex7700_firmware:*:*:*:*:*:*:*:* 1.0.0.216
execution environment
1 cpe:2.3:h:netgear:ex7700:-:*:*:*:*:*:*:*
Configuration15 or higher or less more than less than
cpe:2.3:o:netgear:ex8000_firmware:*:*:*:*:*:*:*:* 1.0.1.232
execution environment
1 cpe:2.3:h:netgear:ex8000:-:*:*:*:*:*:*:*
Configuration16 or higher or less more than less than
cpe:2.3:o:netgear:lbr20_firmware:*:*:*:*:*:*:*:* 2.6.3.50
execution environment
1 cpe:2.3:h:netgear:lbr20:-:*:*:*:*:*:*:*
Configuration17 or higher or less more than less than
cpe:2.3:o:netgear:r7800_firmware:*:*:*:*:*:*:*:* 1.0.2.80
execution environment
1 cpe:2.3:h:netgear:r7800:-:*:*:*:*:*:*:*
Configuration18 or higher or less more than less than
cpe:2.3:o:netgear:r8900_firmware:*:*:*:*:*:*:*:* 1.0.5.28
execution environment
1 cpe:2.3:h:netgear:r8900:-:*:*:*:*:*:*:*
Configuration19 or higher or less more than less than
cpe:2.3:o:netgear:r9000_firmware:*:*:*:*:*:*:*:* 1.0.5.28
execution environment
1 cpe:2.3:h:netgear:r9000:-:*:*:*:*:*:*:*
Configuration20 or higher or less more than less than
cpe:2.3:o:netgear:rbk12_firmware:*:*:*:*:*:*:*:* 2.7.2.104
execution environment
1 cpe:2.3:h:netgear:rbk12:-:*:*:*:*:*:*:*
Configuration21 or higher or less more than less than
cpe:2.3:o:netgear:rbk13_firmware:*:*:*:*:*:*:*:* 2.7.2.104
execution environment
1 cpe:2.3:h:netgear:rbk13:-:*:*:*:*:*:*:*
Configuration22 or higher or less more than less than
cpe:2.3:o:netgear:rbk14_firmware:*:*:*:*:*:*:*:* 2.7.2.104
execution environment
1 cpe:2.3:h:netgear:rbk14:-:*:*:*:*:*:*:*
Configuration23 or higher or less more than less than
cpe:2.3:o:netgear:rbk15_firmware:*:*:*:*:*:*:*:* 2.7.2.104
execution environment
1 cpe:2.3:h:netgear:rbk15:-:*:*:*:*:*:*:*
Configuration24 or higher or less more than less than
cpe:2.3:o:netgear:rbk20_firmware:*:*:*:*:*:*:*:* 2.6.2.104
execution environment
1 cpe:2.3:h:netgear:rbk20:-:*:*:*:*:*:*:*
Configuration25 or higher or less more than less than
cpe:2.3:o:netgear:rbk23_firmware:*:*:*:*:*:*:*:* 2.7.2.104
execution environment
1 cpe:2.3:h:netgear:rbk23:-:*:*:*:*:*:*:*
Configuration26 or higher or less more than less than
cpe:2.3:o:netgear:rbk40_firmware:*:*:*:*:*:*:*:* 2.6.2.104
execution environment
1 cpe:2.3:h:netgear:rbk40:-:*:*:*:*:*:*:*
Configuration27 or higher or less more than less than
cpe:2.3:o:netgear:rbk43_firmware:*:*:*:*:*:*:*:* 2.6.2.104
execution environment
1 cpe:2.3:h:netgear:rbk43:-:*:*:*:*:*:*:*
Configuration28 or higher or less more than less than
cpe:2.3:o:netgear:rbk43s_firmware:*:*:*:*:*:*:*:* 2.6.2.104
execution environment
1 cpe:2.3:h:netgear:rbk43s:-:*:*:*:*:*:*:*
Configuration29 or higher or less more than less than
cpe:2.3:o:netgear:rbk44_firmware:*:*:*:*:*:*:*:* 2.6.2.104
execution environment
1 cpe:2.3:h:netgear:rbk44:-:*:*:*:*:*:*:*
Configuration30 or higher or less more than less than
cpe:2.3:o:netgear:rbk50_firmware:*:*:*:*:*:*:*:* 2.7.2.104
execution environment
1 cpe:2.3:h:netgear:rbk50:-:*:*:*:*:*:*:*
Configuration31 or higher or less more than less than
cpe:2.3:o:netgear:rbk53_firmware:*:*:*:*:*:*:*:* 2.7.2.104
execution environment
1 cpe:2.3:h:netgear:rbk53:-:*:*:*:*:*:*:*
Configuration32 or higher or less more than less than
cpe:2.3:o:netgear:rbr10_firmware:*:*:*:*:*:*:*:* 2.6.2.104
execution environment
1 cpe:2.3:h:netgear:rbr10:-:*:*:*:*:*:*:*
Configuration33 or higher or less more than less than
cpe:2.3:o:netgear:rbr20_firmware:*:*:*:*:*:*:*:* 2.6.2.104
execution environment
1 cpe:2.3:h:netgear:rbr20:-:*:*:*:*:*:*:*
Configuration34 or higher or less more than less than
cpe:2.3:o:netgear:rbr40_firmware:*:*:*:*:*:*:*:* 2.6.2.104
execution environment
1 cpe:2.3:h:netgear:rbr40:-:*:*:*:*:*:*:*
Configuration35 or higher or less more than less than
cpe:2.3:o:netgear:rbr50_firmware:*:*:*:*:*:*:*:* 2.7.2.104
execution environment
1 cpe:2.3:h:netgear:rbr50:-:*:*:*:*:*:*:*
Configuration36 or higher or less more than less than
cpe:2.3:o:netgear:rbs10_firmware:*:*:*:*:*:*:*:* 2.6.2.104
execution environment
1 cpe:2.3:h:netgear:rbs10:-:*:*:*:*:*:*:*
Configuration37 or higher or less more than less than
cpe:2.3:o:netgear:rbs20_firmware:*:*:*:*:*:*:*:* 2.6.2.104
execution environment
1 cpe:2.3:h:netgear:rbs20:-:*:*:*:*:*:*:*
Configuration38 or higher or less more than less than
cpe:2.3:o:netgear:rbs40_firmware:*:*:*:*:*:*:*:* 2.6.2.104
execution environment
1 cpe:2.3:h:netgear:rbs40:-:*:*:*:*:*:*:*
Configuration39 or higher or less more than less than
cpe:2.3:o:netgear:rbs50_firmware:*:*:*:*:*:*:*:* 2.7.2.104
execution environment
1 cpe:2.3:h:netgear:rbs50:-:*:*:*:*:*:*:*
Configuration40 or higher or less more than less than
cpe:2.3:o:netgear:rbs50y_firmware:*:*:*:*:*:*:*:* 2.6.2.104
execution environment
1 cpe:2.3:h:netgear:rbs50y:-:*:*:*:*:*:*:*
Configuration41 or higher or less more than less than
cpe:2.3:o:netgear:xr450_firmware:*:*:*:*:*:*:*:* 2.3.2.114
execution environment
1 cpe:2.3:h:netgear:xr450:-:*:*:*:*:*:*:*
Configuration42 or higher or less more than less than
cpe:2.3:o:netgear:xr500_firmware:*:*:*:*:*:*:*:* 2.3.2.114
execution environment
1 cpe:2.3:h:netgear:xr500:-:*:*:*:*:*:*:*
Configuration43 or higher or less more than less than
cpe:2.3:o:netgear:xr700_firmware:*:*:*:*:*:*:*:* 1.0.1.38
execution environment
1 cpe:2.3:h:netgear:xr700:-:*:*:*:*:*:*:*
Related information, measures and tools
Common Vulnerabilities List
JVN Vulnerability Information
NETGEAR R7800 ファームウェアにおける OS コマンドインジェクションの脆弱性
Title NETGEAR R7800 ファームウェアにおける OS コマンドインジェクションの脆弱性
Summary

NETGEAR R7800 ファームウェアには、OS コマンドインジェクションの脆弱性が存在します。 Zero Day Initiative は、本脆弱性に ZDI-CAN-12355 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 Feb. 11, 2021, midnight
Registration Date Nov. 22, 2021, 2:39 p.m.
Last Update Nov. 22, 2021, 2:39 p.m.
Affected System
ネットギア
BR200 ファームウェア 
BR500 ファームウェア 
D7800 ファームウェア 
EX6100v2 ファームウェア 
EX6150v2 ファームウェア 
EX6250 ファームウェア 
EX6400 ファームウェア 
EX6400v2 ファームウェア 
EX6410 ファームウェア 
EX6420 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11月22日]
  掲載		 Nov. 22, 2021, 2:39 p.m.