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CVE-2021-0219— Junos OS: Command injection vulnerability in 'request system software' CLI command

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 存在操作系统命令注入漏洞，攻击者可利用该漏洞绕过限制通过请求程序中的系统软件来提升权限。以下产品及版本受到影响：Junos OS: all versions prior to 17.3R3-S10; 17.4 versions prior to 17.4R2-S12, 17.4R3-S3;

CVSS 6.7 · Medium EPSS 0.70% · P52

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2021-0219

Vulnerability Information
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Vulnerability Title
Junos OS: Command injection vulnerability in 'request system software' CLI command
Source: CVE Program / CVE List V5
Vulnerability Description
A command injection vulnerability in install package validation subsystem of Juniper Networks Junos OS that may allow a locally authenticated attacker with privileges to execute commands with root privilege. To validate a package in Junos before installation, an administrator executes the command 'request system software add validate-on-host' via the CLI. An attacker with access to this CLI command may be able to exploit this vulnerability. This issue affects Juniper Networks Junos OS: all versions prior to 17.3R3-S10; 17.4 versions prior to 17.4R2-S12, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R2-S8, 18.2R3-S6; 18.3 versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R1-S8, 18.4R2-S7, 18.4R3-S6; 19.1 versions prior to 19.1R1-S6, 19.1R2-S2, 19.1R3-S3; 19.2 versions prior to 19.2R3-S1; 19.3 versions prior to 19.3R2-S5, 19.3R3-S1; 19.4 versions prior to 19.4R2-S2, 19.4R3-S1; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R1-S2, 20.2R2; 20.3 versions prior to 20.3R1-S1, 20.3R2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS 操作系统命令注入漏洞
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 存在操作系统命令注入漏洞，攻击者可利用该漏洞绕过限制通过请求程序中的系统软件来提升权限。以下产品及版本受到影响：Junos OS: all versions prior to 17.3R3-S10; 17.4 versions prior to 17.4R2-S12, 17.4R3-S3;
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 unspecified ~ 17.3R3-S10 -

II. Public POCs for CVE-2021-0219

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III. Intelligence Information for CVE-2021-0219

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Vendor Advisories for CVE-2021-0219 (1)

Same Patch Batch · Juniper Networks · 2021-01-15 · 19 CVEs total

CVE-2021-0211 10.0 CRITICAL Junos OS and Junos OS Evolved: Upon receipt of a specific BGP FlowSpec message network tra
CVE-2021-0208 8.8 HIGH Junos OS and Junos OS Evolved: In bidirectional LSP configurations, on MPLS egress router
CVE-2021-0203 8.6 HIGH Junos OS: EX and QFX5K Series: Storm Control does not work as expected when Redundant Trun
CVE-2021-0204 7.8 HIGH Junos OS: dexp Local Privilege Escalation vulnerabilities in SUID binaries
CVE-2021-0218 7.8 HIGH Junos OS: Command injection vulnerability in license-check daemon
CVE-2021-0223 7.8 HIGH Junos OS: telnetd.real Local Privilege Escalation vulnerabilities in SUID binaries
CVE-2021-0206 7.5 HIGH Junos OS: NFX Series, SRX Series: PFE may crash upon receipt of specific packet when SSL P
CVE-2021-0207 7.5 HIGH NFX250, NFX350, QFX5K Series, EX2300 Series, EX3400 Series, EX4300 Multigigabit, EX4600 Se
CVE-2021-0202 7.5 HIGH Junos OS: MX Series, EX9200 Series: Trio-based MPC memory leak when Integrated Routing and
CVE-2021-0217 7.4 HIGH Junos OS: EX Series and QFX Series: Memory leak issue processing specific DHCP packets
CVE-2021-0222 7.4 HIGH Junos OS: Upon receipt of certain protocol packets with invalid payloads a self-propagatin
CVE-2021-0210 6.8 MEDIUM Junos OS: Privilege escalation in J-Web due to arbitrary command and code execution via in
CVE-2021-0220 6.8 MEDIUM Junos Space: Shared secrets stored in recoverable format and directly exposed through the
CVE-2021-0209 6.5 MEDIUM Junos OS Evolved: Receipt of certain valid BGP update packets from BGP peers may cause RPD
CVE-2021-0215 6.5 MEDIUM Junos OS: EX Series, QFX Series, SRX Branch Series, MX Series: Memory leak in packet forwa
CVE-2021-0221 6.5 MEDIUM Junos OS: QFX Series: Traffic loop Denial of Service (DoS) upon receipt of specific IP mul
CVE-2021-0205 5.8 MEDIUM Junos OS: MX Series: Dynamic filter fails to match IPv6 prefix
CVE-2021-0212 5.0 MEDIUM Contrail Networking: Administrator credentials are exposed in a plaintext file

IV. Related Vulnerabilities

Same product: Junos OS
Same vendor: Juniper Networks
Same weakness: CWE-78

V. Comments for CVE-2021-0219

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