Vulnerability Name:

CVE-2021-0225 (CCN-199984)

Assigned:2020-10-27
Published:2021-04-14
Updated:2021-04-27
Summary:An Improper Check for Unusual or Exceptional Conditions in Juniper Networks Junos OS Evolved may cause the stateless firewall filter configuration which uses the action 'policer' in certain combinations with other options to not take effect. An administrator can use the following CLI command to see the failures with filter configuration: user@device> show log kfirewall-agent.log | match ERROR Jul 23 14:16:03 ERROR: filter not supported This issue affects Juniper Networks Junos OS Evolved: Versions 19.1R1-EVO and above prior to 20.3R1-S2-EVO, 20.3R2-EVO. This issue does not affect Juniper Networks Junos OS.
CVSS v3 Severity:5.8 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N)
5.1 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
5.8 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N)
5.1 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-754
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2021-0225

Source: XF
Type: UNKNOWN
juniper-cve20210225-sec-bypass(199984)

Source: CCN
Type: Juniper Networks Security Bulletin JSA11120
Junos OS Evolved: Stateless IP firewall filter does not work as expected (CVE-2021-0225)

Source: MISC
Type: Vendor Advisory
https://kb.juniper.net/JSA11120

Vulnerable Configuration:Configuration 1:
  • cpe:/o:juniper:junos_os_evolved:19.1:r1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos_os_evolved:19.1:r2:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos_os_evolved:19.2:r1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos_os_evolved:19.2:r2:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos_os_evolved:19.3:r1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos_os_evolved:19.3:r2:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos_os_evolved:20.1:r1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos_os_evolved:20.1:r1-s1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos_os_evolved:20.2:r1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos_os_evolved:20.2:r1-s1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos_os_evolved:20.3:r1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos_os_evolved:20.3:r1-s1:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    juniper junos os evolved 19.1 r1
    juniper junos os evolved 19.1 r2
    juniper junos os evolved 19.2 r1
    juniper junos os evolved 19.2 r2
    juniper junos os evolved 19.3 r1
    juniper junos os evolved 19.3 r2
    juniper junos os evolved 20.1 r1
    juniper junos os evolved 20.1 r1-s1
    juniper junos os evolved 20.2 r1
    juniper junos os evolved 20.2 r1-s1
    juniper junos os evolved 20.3 r1
    juniper junos os evolved 20.3 r1-s1