CVE-2021-0210— Junos OS: Privilege escalation in J-Web due to arbitrary command and code execution via information disclosure from another users active session
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I. Basic Information for CVE-2021-0210
Vulnerability Information
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Vulnerability Title
Junos OS: Privilege escalation in J-Web due to arbitrary command and code execution via information disclosure from another users active session
Source: NVD (National Vulnerability Database)
Vulnerability Description
An Information Exposure vulnerability in J-Web of Juniper Networks Junos OS allows an unauthenticated attacker to elevate their privileges over the target system through opportunistic use of an authenticated users session. This issue affects: Juniper Networks Junos OS 12.3 versions prior to 12.3R12-S17; 17.3 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 18.2R3-S6; 18.3 versions prior to 18.3R2-S4, 18.3R3-S4; 18.4 versions prior to 18.4R2-S5, 18.4R3-S5; 19.1 versions prior to 19.1R1-S6, 19.1R2-S2, 19.1R3-S3; 19.2 versions prior to 19.2R1-S5, 19.2R3, 19.2R3-S1; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S2, 19.4R3; 20.1 versions prior to 20.1R1-S4, 20.1R2; 20.2 versions prior to 20.2R1-S1, 20.2R2.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Juniper Networks Junos OS 信息泄露漏洞
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 Evolved是Junos OS的升级版。 Junos OS 存在信息泄露漏洞。攻击者可利用该漏洞可以通过Junos的J-Web绕过限制，以升级他的特权。以下产品及版本受到影响：Junos OS 12.3 versions prior to 12.3R12-S17; 17.3 versions
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 | 12.3 ~ 12.3R12-S17 | - |
II. Public POCs for CVE-2021-0210
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|---|
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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-2021-0223 | 7.8 HIGH | Junos OS: telnetd.real Local Privilege Escalation vulnerabilities in SUID binaries |
| CVE-2021-0218 | 7.8 HIGH | Junos OS: Command injection vulnerability in license-check daemon |
| CVE-2021-0204 | 7.8 HIGH | Junos OS: dexp Local Privilege Escalation vulnerabilities in SUID binaries |
| CVE-2021-0207 | 7.5 HIGH | NFX250, NFX350, QFX5K Series, EX2300 Series, EX3400 Series, EX4300 Multigigabit, EX4600 Se |
| CVE-2021-0206 | 7.5 HIGH | Junos OS: NFX Series, SRX Series: PFE may crash upon receipt of specific packet when SSL P |
| CVE-2021-0202 | 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-2021-0220 | 6.8 MEDIUM | Junos Space: Shared secrets stored in recoverable format and directly exposed through the |
| CVE-2021-0219 | 6.7 MEDIUM | Junos OS: Command injection vulnerability in 'request system software' CLI command |
| 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
- CVE-2026-33791
Junos OS and Junos OS Evolved: Execution of crafted CLI comm - CVE-2026-33790
Junos OS: SRX Series: In a NAT64 configuration, receipt of a - CVE-2026-33787
Junos OS: SRX1500, SRX4100, SRX4200, SRX4600: When a specifi - CVE-2026-33785
Junos OS: MX Series: Missing Authorization for specific 'req - CVE-2026-33781
Junos OS: EX Series, QFX Series: In a VXLAN scenario when sp
Same vendor: Juniper Networks
- CVE-2026-33791
Junos OS and Junos OS Evolved: Execution of crafted CLI comm - CVE-2026-33790
Junos OS: SRX Series: In a NAT64 configuration, receipt of a - CVE-2026-33787
Junos OS: SRX1500, SRX4100, SRX4200, SRX4600: When a specifi - CVE-2026-33785
Junos OS: MX Series: Missing Authorization for specific 'req - CVE-2026-33784
JSI Virtual Lightweight Collector: Default password is not r
V. Comments for CVE-2021-0210
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