Home/CVE/An improper restriction of operations within the bounds of a memory buffer vulnerability in Juniper Networks Junos OS J-
CVE

CVE-2021-0227

An improper restriction of operations within the bounds of a memory buffer vulnerability in Juniper Networks Junos OS J-

An improper restriction of operations within the bounds of a memory buffer vulnerability in Juniper Networks Junos OS J-Web on SRX Series devices allows an attacker to cause Denial of Service (DoS) by sending certain crafted HTTP packets. Continued receipt and processing of these packets will create a sustained Denial of Service (DoS) condition. When this issue occurs, web-management, NTP daemon (ntpd) and Layer 2 Control Protocol process (L2CPD) daemons might crash. This issue affects Juniper Networks Junos OS on SRX Series: 17.3 versions prior to 17.3R3-S9.

17.4 versions prior to 17.4R2-S11, 17.4R3-S2.

18.2 versions prior to 18.2R3-S5.

18.3 versions prior to 18.3R2-S4, 18.3R3-S3.

18.4 versions prior to 18.4R2-S5, 18.4R3-S4.

19.1 versions prior to 19.1R3-S2.

19.2 versions prior to 19.2R1-S5, 19.2R3.

19.3 versions prior to 19.3R3.

19.4 versions prior to 19.4R2-S1, 19.4R3.

20.1 versions prior to 20.1R1-S2, 20.1R2;.

HIGH · CVSS 7.5 EPSS 0.01187
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
▤

Affected Products & Versions

1
juniper junosall versions
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · sirt@juniper.net
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD22 Apr 2021 · 08:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://kb.juniper.net/JSA11122Vendor Advisory
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