NVD Vulnerability Detail
Search Exploit, PoC
CVE-2021-23017
Summary

A security issue in nginx resolver was identified, which might allow an attacker who is able to forge UDP packets from the DNS server to cause 1-byte memory overwrite, resulting in worker process crash or potential other impact.

Publication Date June 1, 2021, 10:15 p.m.
Registration Date June 2, 2021, 10 a.m.
Last Update Nov. 21, 2024, 2:51 p.m.
CVSS3.1 : HIGH
スコア 7.7
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
攻撃元区分(AV) ネットワーク
攻撃条件の複雑さ(AC)
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)
完全性への影響(I)
可用性への影響(A)
CVSS2.0 : MEDIUM
Score 6.8
Vector AV:N/AC:M/Au:N/C:P/I:P/A:P
攻撃元区分(AV) ネットワーク
攻撃条件の複雑さ(AC)
攻撃前の認証要否(Au) 不要
機密性への影響(C)
完全性への影響(I)
可用性への影響(A)
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:a:f5:nginx:*:*:*:*:*:*:*:* 0.6.18 1.20.1
Configuration2 or higher or less more than less than
cpe:2.3:a:openresty:openresty:*:*:*:*:*:*:*:* 1.19.3.2
Configuration3 or higher or less more than less than
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
Configuration4 or higher or less more than less than
cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*
Configuration5 or higher or less more than less than
cpe:2.3:a:oracle:communications_operations_monitor:3.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:enterprise_session_border_controller:8.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_operations_monitor:4.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_operations_monitor:4.3:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_session_border_controller:8.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:enterprise_session_border_controller:9.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_session_border_controller:9.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:enterprise_communications_broker:3.3.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:enterprise_telephony_fraud_monitor:4.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:enterprise_telephony_fraud_monitor:4.3:*:*:*:*:*:*:*
cpe:2.3:a:oracle:enterprise_telephony_fraud_monitor:4.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:enterprise_telephony_fraud_monitor:3.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_operations_monitor:4.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_fraud_monitor:*:*:*:*:*:*:*:* 3.4 4.4
cpe:2.3:a:oracle:communications_control_plane_monitor:4.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_control_plane_monitor:4.3:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_control_plane_monitor:4.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_control_plane_monitor:3.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:goldengate:*:*:*:*:*:*:*:* 21.4.0.0.0
cpe:2.3:a:oracle:blockchain_platform:*:*:*:*:*:*:*:* 21.1.2
Related information, measures and tools
Common Vulnerabilities List

JVN Vulnerability Information
nginx リゾルバにおける境界条件の判定に関する脆弱性
Title nginx リゾルバにおける境界条件の判定に関する脆弱性
Summary

nginx リゾルバには、境界条件の判定に関する脆弱性が存在します。

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 May 25, 2021, midnight
Registration Date Feb. 18, 2022, 10:21 a.m.
Last Update Feb. 18, 2022, 10:21 a.m.
Affected System
オラクル
Oracle Communications Control Plane Monitor 
Oracle Communications Fraud Monitor 
Oracle Communications Operations Monitor 
Oracle Enterprise Telephony Fraud Monitor 
Fedora Project
Fedora 
NetApp
ONTAP Select Deploy administration utility 
F5 Networks
nginx 
OpenResty Inc.
OpenResty 
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
Change Log
No Changed Details Date of change
1 [2022年02月18日]
  掲載
Feb. 18, 2022, 10:21 a.m.