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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.1280.2 PAN-OS: OpenSSH software upgraded to resolve multiple vulnerabilities 13 May 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: PAN-OS Publisher: Palo Alto Operating System: Network Appliance Impact/Access: Overwrite Arbitrary Files -- Remote with User Interaction Provide Misleading Information -- Remote with User Interaction Access Confidential Data -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2019-6111 CVE-2019-6109 CVE-2018-20685 Reference: ASB-2019.0300 ASB-2019.0124 ESB-2019.4117 ESB-2019.3795 ESB-2019.2671 ESB-2019.2141 Original Bulletin: https://securityadvisories.paloaltonetworks.com/PAN-SA-2020-0002 Revision History: May 13 2020: Vendor released update to clarify product status April 9 2020: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Palo Alto Networks Security Advisories / PAN-SA-2020-0002 PAN-SA-2020-0002 PAN-OS: OpenSSH software upgraded to resolve multiple vulnerabilities 047910 Severity 6.8 . MEDIUM Attack Vector NETWORK Attack Complexity HIGH Privileges Required NONE User Interaction REQUIRED Scope UNCHANGED Confidentiality Impact NONE Integrity Impact HIGH Availability Impact HIGH JSON Published: 2020-04-08 Updated: 2020-05-05 Ref#: PAN-111636 Description OpenSSH software included with PAN-OS has been upgraded to resolve multiple vulnerabilities. These issue affects Palo Alto Networks PAN-OS 7.1 versions before 7.1.26; 8.0 versions before 8.0.21; 8.1 versions before 8.1.13; 9.0 versions before 9.0.7. The resolved vulnerabilities include: CVE CVSS Summary 5.3 ( In OpenSSH 7.9, scp.c in the scp client allows CVSS:3.0/ remote SSH servers to bypass intended access CVE-2018-20685 AV:N/AC:H/ restrictions via the filename of . or an empty PR:N/UI:R/ filename. The impact is modifying the permissions of S:U/C:N/I:H the target directory on the client side. /A:N) 6.8 ( An issue was discovered in OpenSSH 7.9. Due to CVSS:3.0/ missing character encoding in the progress display, AV:N/AC:H/ a malicious server (or Man-in-The-Middle attacker) CVE-2019-6109 PR:N/UI:R/ can employ crafted object names to manipulate the S:U/C:H/I:H client output, e.g., by using ANSI control codes to /A:N) hide additional files being transferred. This affects refresh_progress_meter() in progressmeter.c. An issue was discovered in OpenSSH 7.9. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to 5.9 ( the client. However, the scp client only performs CVSS:3.0/ cursory validation of the object name returned (only CVE-2019-6111 AV:N/AC:H/ directory traversal attacks are prevented). A PR:N/UI:N/ malicious scp server (or Man-in-The-Middle attacker) S:U/C:N/I:H can overwrite arbitrary files in the scp client /A:N) target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/ authorized_keys file). Product Status PAN-OS Versions Affected Unaffected 9.0 < 9.0.7 >= 9.0.7 8.1 < 8.1.13 >= 8.1.13 8.0 < 8.0.21 >= 8.0.21 7.1 < 7.1.26 >= 7.1.26 Severity: MEDIUM CVSSv3.1 Base Score: 6.8 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H) Solution These issues are fixed in PAN-OS 7.1.26 (pending release), PAN-OS 8.0.21, PAN-OS 8.1.13, PAN-OS 9.0.7 and all later versions. Workarounds and Mitigations This issue affects the management interface of PAN-OS and is mitigated by following best practices for securing the PAN-OS management interface. Our best practices guidelines reduce the exposure of the management interface to potential attackers. Please review the Best Practices for Securing Administrative Access in the PAN-OS 8.1 technical documentation, available at: https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-admin/getting-started/ best-practices-for-securing-administrative-access. Terms of usePrivacyProduct Security Assurance and Vulnerability Disclosure Policy Report vulnerabilitiesManage subscriptions (C) 2020 Palo Alto Networks, Inc. All rights reserved. - --------------------------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 iQIVAwUBXrsnAGaOgq3Tt24GAQgsgBAAhpVBVyIiOq2WlTelro8iurf/Zky9NIAf DI4RuyyL3/vJ+IOgH80RWvaQXP/EQ+JQlZ04OQ5hzF33qZUUfPpj6lGi5B5obv1d wM4nRQu+R+sJGS1H1G6QNmCS8PUGIOXhpNrLIpF3cA2M5ohtdRmKDII4/FVU/W4t NKXDMCijy7UkRBFJZFGbol1DETJtFAyZBQXo82yKYy0XgzYR/JsF8G5T8duV8x2J bIMKifejifeC3AZRhN3jcVPj9Nbdu8S3bKZ8roTz2mcyal1VPuLDKTNdVRBuG8fM rFKDdPwPbhbI6NU4q8AU9RPlt4435SP+4S6VlFWwMtwAn7JMViPpW8/BYcOc+Do4 F77/0loiSa9X6nKMtrup5oJVnQNsN8meA3Hf9xX3xpfzYxNjBoYqUkI5xQRHuCaf zuE0F4mAli6H3sGtuXKMopYEzLtET5//zBOW5NxJLKYm/9n+P7wKRZms6xeoFn2B SYoqBLGEnoazZqRkq+9bm0vEqGMJcuLFOJar0Qeosl6BCgYpXiUlm/cm3wgEl8kU 99zW6ANBYF5aNtBjBmTsiQV5L54UvkR4Xyuj8q5ygQK9YY2sOLUBxpHNv0D0WfrA cXQ1yWc76gFUhQ0IV8WNrflYsJeo5aOzgyhLc4L4r/8DLWIubOjhhz1DFfkKTYL9 GNIJkVR/q6U= =CLD3 -----END PGP SIGNATURE-----