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CVE-2021-0227— Junos OS: SRX Series: Denial of Service in J-Web upon receipt of crafted HTTP packets

Quick assessment

Affected
Juniper Networks Junos OS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Juniper Networks Junos OS是美国瞻博网络（Juniper Networks）公司的一套专用于该公司的硬件设备的网络操作系统。该操作系统提供了安全编程接口和Junos SDK。 Junos OS 存在缓冲区错误漏洞，该漏洞源于边界错误而存在脆弱性。远程攻击者可以向系统发送专门制作的HTTP请求，触发内存损坏并执行拒绝服务(Dos)攻击。

CVSS 7.5 · High EPSS 1.31% · P70
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I. Basic Information for CVE-2021-0227

Vulnerability Information
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Vulnerability Title
Junos OS: SRX Series: Denial of Service in J-Web upon receipt of crafted HTTP packets
Source: CVE Program / CVE List V5
Vulnerability Description
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;
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
内存缓冲区边界内操作的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper Networks Junos OS是美国瞻博网络（Juniper Networks）公司的一套专用于该公司的硬件设备的网络操作系统。该操作系统提供了安全编程接口和Junos SDK。 Junos OS 存在缓冲区错误漏洞，该漏洞源于边界错误而存在脆弱性。远程攻击者可以向系统发送专门制作的HTTP请求，触发内存损坏并执行拒绝服务(Dos)攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Juniper Networks Junos OS 17.3 ~ 17.3R3-S9 -

II. Public POCs for CVE-2021-0227

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III. Intelligence Information for CVE-2021-0227

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Same Patch Batch · Juniper Networks · 2021-04-22 · 53 CVEs total

CVE-2021-0248 10.0 CRITICAL NFX Series: Hard-coded credentials allow an attacker to take control of any instance throu
CVE-2021-0254 9.8 CRITICAL Junos OS: Remote code execution vulnerability in overlayd service
CVE-2021-0275 8.8 HIGH Junos OS: J-Web: Cross-site scripting attack allows an attacker to gain control of another
CVE-2021-0269 8.8 HIGH Junos OS: J-Web can be compromised through reflected client-side HTTP parameter pollution
CVE-2021-0268 8.8 HIGH Junos OS: J-Web has an Improper Neutralization of CRLF Sequences in its HTTP Headers which
CVE-2021-0251 8.6 HIGH Junos OS: MX Series with MS-PIC, MS-SPC3, MS-MIC or MS-MPC: The BRAS Subscriber Services s
CVE-2021-0249 8.1 HIGH Junos OS: SRX Series: A remote attacker may be able to cause a PFE buffer overflow to arbi
CVE-2021-0266 8.1 HIGH cSRX: Use of Hard-coded Cryptographic Keys allows an attacker to take control of the devic
CVE-2021-0265 8.1 HIGH Contrail Insights: The REST API implementation allows an unauthenticated remote attacker t
CVE-2021-0245 7.8 HIGH Junos OS: Junos Fusion: Hard-coded credentials on satellite devices allows a locally authe
CVE-2021-0252 7.8 HIGH Junos OS: NFX Series: Local Code Execution Vulnerability in JDMD Leads to Privilege Escala
CVE-2021-0253 7.8 HIGH Junos OS: NFX Series: Local Command Execution Vulnerability in JDMD Leads to Privilege Esc
CVE-2021-0250 7.5 HIGH Junos OS and Junos OS Evolved: An attacker sending a specific crafted BGP update message w
CVE-2021-0270 7.5 HIGH Junos OS: PTX Series, QFX10K Series: A PTX/QFX FPC may restart unexpectedly with the "inli
CVE-2021-0261 7.5 HIGH Junos OS: Denial of Service vulnerability in J-Web and web based (HTTP/HTTPS) services cau
CVE-2021-0230 7.5 HIGH Junos OS: SRX Series: Memory leak when querying Aggregated Ethernet (AE) interface statist
CVE-2021-0233 7.5 HIGH Junos OS: ACX500 Series, ACX4000 Series: Denial of Service due to FFEB crash while process
CVE-2021-0259 7.4 HIGH Junos OS and Junos OS Evolved: QFX5K Series: Underlay network traffic might not be process
CVE-2021-0240 7.4 HIGH Junos OS: Receipt of malformed DHCPv6 packets causes jdhcpd to crash and restart.
CVE-2021-0241 7.4 HIGH Junos OS: Receipt of specific DHCPv6 packet may cause jdhcpd to crash and restart

Showing top 20 of 53 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Junos OS
Same vendor: Juniper Networks
Same weakness: CWE-119

V. Comments for CVE-2021-0227

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