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CVE-2021-0286

CVE information

Published

1 year ago

Last Modified

1 year ago

CVSSv2.0 Severity

High

CVSSv3.1 Severity

High

Impact Analysis

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..

CVSSv2.0 Score

Severity
High
Base Score
7.8/10
Exploit Score
10/10
Access Vector
Network
Access Complexity
Low
Authentication Required
None
Impact Score
6.9/10
Confidentiality Impact
None
Availability Impact
Complete
Integrity Impact
None

CVSSv3.1 Score

Severity
High
Base Score
7.5/10
Exploit Score
3.9/10
Access Vector
Network
Access Complexity
Low
Privileges Required
None
Impact Score
3.6/10
Confidentiality Impact
None
Availability Impact
High
Integrity Impact
None
Scope
Unchanged
User Interaction
None

Products Affected

CPE Affected Vulnerable Excluding Edit
cpe:2.3:o:juniper:junos_os_evolved:19.3:r1:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:19.3:r2:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:19.2:r1:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:19.2:r2:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:20.1:r1:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:20.3:r1:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:20.1:r1-s1:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:20.4:r1:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:19.4:r1:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:21.1:r1:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:20.3:-:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:20.2:-:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:20.1:-:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:19.4:r2-s1:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:19.4:r2:*:*:*:*:*:*
  Yes
- -