Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.1260 JSA11120 - 2021-04 Security Bulletin: Junos OS Evolved: Stateless IP firewall filter does not work as expected 15 April 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Junos OS Evolved: Stateless IP firewall filter Publisher: Juniper Networks Operating System: Juniper Impact/Access: Reduced Security -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2021-0225 Original Bulletin: http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11120 - --------------------------BEGIN INCLUDED TEXT-------------------- 2021-04 Security Bulletin: Junos OS Evolved: Stateless IP firewall filter does not work as expected (CVE-2021-0225) Article ID : JSA11120 Last Updated: 14 Apr 2021 Version : 1.0 Product Affected: This issue affects Junos OS Evolved 19.1R1-EVO and above prior to 20.3R1-S2-EVO, 20.3R2-EVO. Problem: 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: o Versions 19.1R1-EVO and above prior to 20.3R1-S2-EVO, 20.3R2-EVO. This issue does not affect Juniper Networks Junos OS. The examples of the config stanza affected by this issue: [firewall policer] [firewall filter] Juniper SIRT is not aware of any malicious exploitation of this vulnerability. This issue was seen during production usage. This issue has been assigned CVE-2021-0225 . Solution: The following software releases have been updated to resolve this specific issue: Junos OS Evolved: 20.3R1-S2-EVO, 20.3R2-EVO, 20.4R1-EVO, and all subsequent releases. This issue is being tracked as 1528091 . Workaround: There are no viable workarounds for this issue. Implementation: Software releases or updates are available for download at https:// support.juniper.net/support/downloads/ Modification History: 2021-04-14: Initial Publication. CVSS Score: 5.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N) Severity Level: Medium Severity Assessment: Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories." - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBYHewX+NLKJtyKPYoAQingg/9EcMw/EL4oCdC5Myvk2SuI9M3H6iS96T1 gAbpqsjOS4yve/DjKEILLSBKoqtVuPYP2oaAunAUXm+Ogqe6PgR84UUfwn8hH/ij +sLXaDHdjWR+rcfGNOuKW/EkxC06nYCY/1X1//TiTR5Gv8ZRgJUhzalh3chUmIbK 4G2bXJd562asc4JaktYf2i0JVonnFq2eA0hvOUTVqsWtieBkn8s5YbtBi67dYqgE QP+EqD8MSmv2ykfAI67sQkm/TnQ5vAUGs3T3h5qU3xBCJ57N4W1Fo9UrRZPnK3oH yKSu9Rzz+NMqOW+lQVh3OudPFgkLMHg5KXA1bxKQAq4vLy7sVtWwx/iJ+ePHFxmI lMPAbUWS07BnSNf+JNHAuqHNhd/A7soECaZ/axnz6HMPJbS/JIfx8q2VWIG59flP 8dhEvP6u/Xs246iPlgHtNdAvFokaelpiLEA1Sl6nZzVMsuT4PrNorZ+sK5behw6u Z3ZxV3LuwzG9RBH4IUhXRzUl1qfZx5iPX3GTMG10OzugGlIlJafgxKblSX2faLlC eWtNhDdc28OseVCdnTDXjuGWAmpCGvqxnV/t08TpbWtqlyT1KYBLxMrMSYptVDBX X0Ez8CqCgIp5L1vu0jDyaUr8u+BiQkJcwYRfNay1jYV+B8OMpChScNfF5niT9W37 XAA9IChukBA= =C/ZU -----END PGP SIGNATURE-----