NVD Vulnerability Detail
Search Exploit, PoC
CVE-2021-0267
Summary

An Improper Input Validation vulnerability in the active-lease query portion in JDHCPD's DHCP Relay Agent of Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) by sending a crafted DHCP packet to the device thereby crashing the jdhcpd DHCP service. This is typically configured for Broadband Subscriber Sessions. Continued receipt and processing of this crafted packet will create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS: 19.4 versions prior to 19.4R3-S1; 20.1 versions prior to 20.1R2-S1, 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R2. This issue does not affect Junos OS Evolved.

Publication Date April 23, 2021, 5:15 a.m.
Registration Date April 23, 2021, 10:02 a.m.
Last Update Nov. 21, 2024, 2:42 p.m.
CVSS3.1 : MEDIUM
スコア 6.5
Vector CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/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) なし
完全性への影響(I) なし
可用性への影響(A) 高
CVSS2.0 : LOW
Score 3.3
Vector AV:A/AC:L/Au:N/C:N/I:N/A:P
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) なし
完全性への影響(I) なし
可用性への影響(A) 低
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:juniper:junos:19.4:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r1-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r1-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r1-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r1-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r2-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.3:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r1-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.3:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r1-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r2-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.1:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r2-s3:*:*:*:*:*:*
Related information, measures and tools
Common Vulnerabilities List
JVN Vulnerability Information
Juniper Networks Junos OS における入力確認に関する脆弱性
Title Juniper Networks Junos OS における入力確認に関する脆弱性
Summary

Juniper Networks Junos OS には、入力確認に関する脆弱性が存在します。

Possible impacts 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 April 14, 2021, midnight
Registration Date Dec. 17, 2021, 1:49 p.m.
Last Update Dec. 17, 2021, 1:49 p.m.
Affected System
ジュニパーネットワークス
Junos OS 
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 [2021年12月17日]
  掲載		 Dec. 17, 2021, 1:49 p.m.