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CVE-2018-0021— Junos OS: Short MacSec keys may allow man-in-the-middle attacks.

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。 Juniper Networks Junos OS中存在信任管理问题漏洞，该漏洞源于网络系统或产品中缺乏有效的信任管理机制。攻击者可利用默认密码或者硬编码密码、硬编码证书等攻击受影响组件。以下版本受到影响：Juniper Junos OS 14.1版本，14.1X53版本，15.1版本，15.1X49版本，1

AI Predicted 7.5 Difficulty: Hard EPSS 0.60% · P47

Possible ATT&CK Techniques 1 AI

T1597 · Search Closed Sources
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I. Basic Information for CVE-2018-0021

Vulnerability Information
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Vulnerability Title
Junos OS: Short MacSec keys may allow man-in-the-middle attacks.
Source: CVE Program / CVE List V5
Vulnerability Description
If all 64 digits of the connectivity association name (CKN) key or all 32 digits of the connectivity association key (CAK) key are not configured, all remaining digits will be auto-configured to 0. Hence, Juniper devices configured with short MacSec keys are at risk to an increased likelihood that an attacker will discover the secret passphrases configured for these keys through dictionary-based and brute-force-based attacks using spoofed packets. Affected releases are Juniper Networks Junos OS: 14.1 versions prior to 14.1R10, 14.1R9; 14.1X53 versions prior to 14.1X53-D47; 15.1 versions prior to 15.1R4-S9, 15.1R6-S6, 15.1R7; 15.1X49 versions prior to 15.1X49-D100; 15.1X53 versions prior to 15.1X53-D59; 16.1 versions prior to 16.1R3-S8, 16.1R4-S8, 16.1R5; 16.2 versions prior to 16.2R1-S6, 16.2R2; 17.1 versions prior to 17.1R2.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS 信任管理问题漏洞
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。 Juniper Networks Junos OS中存在信任管理问题漏洞，该漏洞源于网络系统或产品中缺乏有效的信任管理机制。攻击者可利用默认密码或者硬编码密码、硬编码证书等攻击受影响组件。以下版本受到影响：Juniper Junos OS 14.1版本，14.1X53版本，15.1版本，15.1X49版本，1
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 14.1 ~ 14.1R10, 14.1R9 -

II. Public POCs for CVE-2018-0021

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III. Intelligence Information for CVE-2018-0021

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Vendor Advisories for CVE-2018-0021 (2)

Same Patch Batch · Juniper Networks · 2018-04-11 · 8 CVEs total

CVE-2018-0016 Junos OS: Kernel crash upon receipt of crafted CLNP datagrams
CVE-2018-0017 SRX Series: Denial of service vulnerability in flowd daemon on devices configured with NAT
CVE-2018-0018 SRX Series: A crafted packet may lead to information disclosure and firewall rule bypass d
CVE-2018-0019 Junos: Denial of service vulnerability in SNMP MIB-II subagent daemon (mib2d).
CVE-2018-0020 Junos OS: rpd daemon cores due to malformed BGP UPDATE packet
CVE-2018-0022 Junos OS: Mbuf leak due to processing MPLS packets in VPLS network.
CVE-2018-0023 Junos Snapshot Administrator (JSNAPy) world writeable default configuration file permissio

IV. Related Vulnerabilities

Same product: Junos OS
Same vendor: Juniper Networks

V. Comments for CVE-2018-0021

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