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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2022.0153 JSA11264 - 2022-01 Security Bulletin: Junos OS: Certificate validation is skipped when fetching system scripts from a HTTPS URL (CVE-2022-22156) 13 January 2022 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Junos OS Publisher: Juniper Networks Operating System: Juniper Impact/Access: Access Confidential Data -- Remote/Unauthenticated Reduced Security -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2022-22156 Original Bulletin: http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11264 - --------------------------BEGIN INCLUDED TEXT-------------------- 2022-01 Security Bulletin: Junos OS: Certificate validation is skipped when fetching system scripts from a HTTPS URL (CVE-2022-22156) Article ID : JSA11264 Last Updated: 12 Jan 2022 Version : 1.0 Product Affected: This issue affects Junos OS all versions prior to 18.4R2-S9, 19.1, 19.2, 19.3, 19.4, 20.1, 20.2, 20.3, 20.4, 21.1. Problem: An Improper Certificate Validation weakness in the Juniper Networks Junos OS allows an attacker to perform Person-in-the-Middle (PitM) attacks when a system script is fetched from a remote source at a specified HTTPS URL, which may compromise the integrity and confidentiality of the device. The following command can be executed by an administrator via the CLI to refresh a script from a remote location, which is affected from this vulnerability: >request system scripts refresh-from (commit | event | extension-service | op | snmp) file filename url <https-url> This issue affects: Juniper Networks Junos OS o All versions prior to 18.4R2-S9, 18.4R3-S9; o 19.1 versions prior to 19.1R2-S3, 19.1R3-S7; o 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; o 19.3 versions prior to 19.3R3-S4; o 19.4 versions prior to 19.4R3-S7; o 20.1 versions prior to 20.1R2-S2, 20.1R3; o 20.2 versions prior to 20.2R3; o 20.3 versions prior to 20.3R2-S1, 20.3R3; o 20.4 versions prior to 20.4R2; o 21.1 versions prior to 21.1R1-S1, 21.1R2. The examples of the config stanza affected by this issue: [event-options event-script file <file-name> source <https-url> refresh] [system scripts (commit | event | extension-service | op | snmp) file filename refresh-from <https-url>] Please note that issuing set refresh-from command does not add the refresh-from statement to the configuration but the command behaves like an operational mode command by executing an operation. 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-2022-22156 . Solution: The following software releases have been updated to resolve this specific issue: 18.4R2-S9, 18.4R3-S9, 19.1R2-S3, 19.1R3-S7, 19.2R1-S7, 19.2R3-S3, 19.3R3-S4, 19.4R3-S7, 20.1R2-S2, 20.1R3, 20.2R3, 20.3R2-S1, 20.3R3, 20.4R2, 21.1R1-S1, 21.1R2, 21.2R1 and all subsequent releases. This issue is being tracked as 1542229 . 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: 2022-01-12: Initial Publication. CVSS Score: 6.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/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. 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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 iQIVAwUBYd+m9eNLKJtyKPYoAQiQ6A/9EvAS5eoVPF5ijWwlTwetcUA6fNDg9r29 H3vnySOkL3Svg6rEbVErfiPr53kdNLgnO0D22NDnF7BdCqUjIKUOlDDSeROulcEp IQD/EqH5AeIiyz6WdpBCvAAyzsCaWa3qKguLyNsF7LvosnlLX39joFkkE8HLrtzF ZqXktlRZALMO8YtovCy7E45qiXdWTmB/CrCSR/UtT1bwvXdLTk3Cn3fvuDIkW2M+ /L7gSw7d8OywLkYXMI8P1guQNTf8Uh4tXKASwAUkKbeIG/qNfi35f0dJA0xuhPkG 0JvsL23JMeva4c4/82OEJQsBuwyQ3rDlVnz4uqt9ZaZfrBOfk79l+hTFg5LOKB3A 6gC3wFaQ6qHeUZEzOcKQYKCckxPDqquF4gLKTOdrurnbWFpCVBxAof18+f/eEyW+ gsSje60CU4MJ7xHNk/VOzFD1aGgpKRD7R6Wmg2oC/INys6/h7uFwDxUK5Wm/eH43 ao06BBcUiUTMR7iUMx4Jwx2HVTNVVg6DTB+pNEAzqqFOmQmLTod/J/1A7vSRCwyX CfDhPoiJW/dqpy6iTasuyiKaI+pIDGUW9X97nQ6uiRFt0HKClFT2OE+O8eS+dWTq Z/o47JSlzdDsJKN4OEOvKORHxohBRT82oVZZUSJ+QIyurHrmaYkypqQx5YUyatPN oQ1473FnpOc= =QgR3 -----END PGP SIGNATURE-----