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CVE-2021-0286— Junos OS Evolved: Specially crafted packets may cause the AFT manager process to crash and restart

Quick assessment

Affected
Juniper Networks Junos OS Evolved
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 存在代码问题漏洞，攻击者可以向设备发送特制数据包，导致高级转发工具包管理器进程崩溃和重启，影响通过FPC的所有流量，导致拒绝服务。

CVSS 7.5 · High EPSS 1.06% · P63
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I. Basic Information for CVE-2021-0286

Vulnerability Information
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Vulnerability Title
Junos OS Evolved: Specially crafted packets may cause the AFT manager process to crash and restart
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the handling of exceptional conditions in Juniper Networks Junos OS Evolved (EVO) allows an attacker to send specially crafted packets to the device, causing the Advanced Forwarding Toolkit manager (evo-aftmand-bt or evo-aftmand-zx) process to crash and restart, impacting all traffic going through the FPC, resulting in a Denial of Service (DoS). Continued receipt and processing of these packets will create a sustained Denial of Service (DoS) condition. Following messages will be logged prior to the crash: Feb 2 10:14:39 fpc0 evo-aftmand-bt[16263]: [Error] Nexthop: Failed to get fwd nexthop for nexthop:32710470974358 label:1089551617 for session:18 probe:35 Feb 2 10:14:39 fpc0 evo-aftmand-bt[16263]: [Error] Nexthop: Failed to get fwd nexthop for nexthop:19241453497049 label:1089551617 for session:18 probe:37 Feb 2 10:14:39 fpc0 evo-aftmand-bt[16263]: [Error] Nexthop: Failed to get fwd nexthop for nexthop:19241453497049 label:1089551617 for session:18 probe:44 Feb 2 10:14:39 fpc0 evo-aftmand-bt[16263]: [Error] Nexthop: Failed to get fwd nexthop for nexthop:32710470974358 label:1089551617 for session:18 probe:47 Feb 2 10:14:39 fpc0 audit[16263]: ANOM_ABEND auid=4294967295 uid=0 gid=0 ses=4294967295 pid=16263 comm="EvoAftManBt-mai" exe="/usr/sbin/evo-aftmand-bt" sig=11 Feb 2 10:14:39 fpc0 kernel: audit: type=1701 audit(1612260879.272:17): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=16263 comm="EvoAftManBt-mai" exe="/usr/sbin/evo-aftmand-bt" sig=1 This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R2-EVO; 21.1 versions prior to 21.1R2-EVO.
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
对异常条件检查或处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS代码问题漏洞
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。 Junos OS 存在代码问题漏洞，攻击者可以向设备发送特制数据包，导致高级转发工具包管理器进程崩溃和重启，影响通过FPC的所有流量，导致拒绝服务。
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 Evolved unspecified ~ 20.4R2-EVO -

II. Public POCs for CVE-2021-0286

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III. Intelligence Information for CVE-2021-0286

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Vendor Advisories for CVE-2021-0286 (1)

Same Patch Batch · Juniper Networks · 2021-07-15 · 19 CVEs total

CVE-2021-0276 9.8 CRITICAL Steel-Belted Radius Carrier Edition: Remote code execution vulnerability when EAP Authenti
CVE-2021-0277 8.8 HIGH Junos OS and Junos OS Evolved: LLDP Out-of-Bounds Read vulnerability in l2cpd
CVE-2021-0278 8.8 HIGH Junos OS: J-Web allows a locally authenticated attacker to escalate their privileges to ro
CVE-2021-0279 8.6 HIGH Contrail Cloud: Hardcoded credentials for RabbitMQ service
CVE-2021-0285 7.5 HIGH Junos OS: QFX5000 Series and EX4600 Series: Continuous traffic destined to a device config
CVE-2021-0280 7.5 HIGH Junos OS: PTX Series, QFX10K Series: Upon receipt of specific packets BFD sessions might f
CVE-2021-0282 7.5 HIGH Junos OS: RPD crash while processing a specific BGP UPDATE when Multipath or add-path feat
CVE-2021-0283 7.5 HIGH Junos OS: Upon receipt of specific sequences of genuine packets destined to the device the
CVE-2021-0287 6.5 MEDIUM Junos OS and Junos OS Evolved: RPD could crash in SR-ISIS/MPLS environment due to a flap o
CVE-2021-0288 6.5 MEDIUM Junos OS: MX Series, EX9200 Series: FPC may crash upon receipt of specific MPLS packet aff
CVE-2021-0289 6.5 MEDIUM Junos OS: User-defined ARP Policer isn't applied on Aggregated Ethernet (AE) interface unt
CVE-2021-0290 6.5 MEDIUM Junos OS: MX Series, EX9200 Series, SRX4600: Ethernet interface vulnerable to specially cr
CVE-2021-0291 6.5 MEDIUM Junos OS and Junos OS Evolved: A vulnerability allows a network based unauthenticated atta
CVE-2021-0292 6.5 MEDIUM Junos OS Evolved: Memory leak in arpd or ndp processes can lead to Denial of Service (DoS)
CVE-2021-0295 6.1 MEDIUM Junos OS: QFX10K Series: Denial of Service (DoS) upon receipt of DVMRP packets received on
CVE-2021-0281 5.9 MEDIUM Junos OS and Junos OS Evolved: Specific packets can trigger rpd crash when BGP Origin Vali
CVE-2021-0293 5.5 MEDIUM Junos OS: Out-of-memory condition and crashes can occur after executing a certain CLI comm
CVE-2021-0294 5.3 MEDIUM Junos OS: QFX5000 Series and EX4600 Series: Enhanced storm control might not work leading

IV. Related Vulnerabilities

Same product: Junos OS Evolved
Same vendor: Juniper Networks
Same weakness: CWE-703

V. Comments for CVE-2021-0286

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