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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.3474 Cisco StarOS Privilege Escalation Vulnerabilities 8 October 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco ASR 5000 Series Routers Publisher: Cisco Systems Operating System: Cisco Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Increased Privileges -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2020-3602 CVE-2020-3601 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-staros-privilege-esc-pyb7YTd https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-staros-priv-esc-gGCUMFxv Comment: This bulletin contains two (2) Cisco Systems security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco StarOS Privilege Escalation Vulnerability Priority: Medium Advisory ID: cisco-sa-staros-privilege-esc-pyb7YTd First Published: 2020 October 7 16:00 GMT Version 1.0: Final Workarounds: No workarounds availableCisco Bug IDs: CSCvv34222 CVE-2020-3602 CWE-20 Summary o A vulnerability in the CLI of Cisco StarOS operating system for Cisco ASR 5000 Series Routers could allow an authenticated, local attacker to elevate privileges on an affected device. The vulnerability is due to insufficient input validation of CLI commands. An attacker could exploit this vulnerability by sending crafted commands to the CLI. A successful exploit could allow the attacker to execute arbitrary code with the privileges of the root user on the affected device. To exploit this vulnerability, an attacker would need to have valid credentials on an affected device and know the password for the cli test-commands command. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-staros-privilege-esc-pyb7YTd Affected Products o Vulnerable Products At the time of publication, this vulnerability affected Cisco ASR 5000 Series Routers if they were running a release of Cisco StarOS earlier than Release 21.19.n4. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Workarounds o There are no workarounds that address this vulnerability. Fixed Software o When considering software upgrades , customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page , to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Fixed Releases At the time of publication, Cisco StarOS releases 21.19.n4 and later contained the fix for this vulnerability. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information. Exploitation and Public Announcements o The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. Source o This vulnerability was found during internal security testing. Cisco Security Vulnerability Policy o To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy . This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco. URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-staros-privilege-esc-pyb7YTd Revision History o +----------+---------------------------+----------+--------+--------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+--------------+ | 1.0 | Initial public release. | - | Final | 2020-OCT-07 | +----------+---------------------------+----------+--------+--------------+ - ------------------------------------------------------------------------------- Cisco StarOS Privilege Escalation Vulnerability Priority: Medium Advisory ID: cisco-sa-staros-priv-esc-gGCUMFxv First Published: 2020 October 7 16:00 GMT Version 1.0: Final Workarounds: No workarounds availableCisco Bug IDs: CSCvv34214 CVE-2020-3601 CWE-20 Summary o A vulnerability in the CLI of Cisco StarOS operating system for Cisco ASR 5000 Series Routers could allow an authenticated, local attacker to elevate privileges on an affected device. The vulnerability is due to insufficient input validation of CLI commands. An attacker could exploit this vulnerability by sending crafted commands to the CLI. A successful exploit could allow the attacker to execute arbitrary code with the privileges of the root user. To exploit this vulnerability, an attacker would need to have valid administrative credentials on an affected device. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-staros-priv-esc-gGCUMFxv Affected Products o Vulnerable Products At the time of publication, this vulnerability affected Cisco ASR 5000 Series Routers if they were running a release of Cisco StarOS earlier than Release 21.19.n4. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Workarounds o There are no workarounds that address this vulnerability. Fixed Software o When considering software upgrades , customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page , to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Fixed Releases At the time of publication, Cisco StarOS releases 21.19.n4 and later contained the fix for this vulnerability. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information. Exploitation and Public Announcements o The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. Source o This vulnerability was found during internal security testing. Cisco Security Vulnerability Policy o To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy . This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco. URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-staros-priv-esc-gGCUMFxv Revision History o +----------+---------------------------+----------+--------+--------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+--------------+ | 1.0 | Initial public release. | - | Final | 2020-OCT-07 | +----------+---------------------------+----------+--------+--------------+ - --------------------------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 iQIVAwUBX35Z/eNLKJtyKPYoAQh6gBAArskR2NZ3QUFPV/4P5BwZ7VZU7vMIWRKY WN/GQndfuX+zZG+/+5zblR49kh857bUL7pYXnx77wKjvsWnTHcb9C3bsfwpGnL/d Xm8gwQB0NYpcgNrPb/n+sOCu73d00/WKJz7uvawwhCx1dLLPox4wxDy3QNu5vz84 iDB8xGxZYYu/Hq5Gc9Sm00ha7j+SEXWbdeqmummVmjClnZ05lP7Krjvr3dDi2M/j mN+wumltUwJa9NrquO8DzhyqTmLKyPQuXcfs6D2HA7PycdbZUletJU+14vfwGq7K ZKYjPL9Pan82VEcPqzIL2bbF+emd0wo1HFxXhUZErmqJQdPFZy9NEj2p+KM+jj/Z bMxMMSFOM5s4ojWonCoUZosEm3JwGmfp2gLpoGiquD2f9ojaDecpYOE2oKRSiIq8 mWmX2uawQ3AEu6TKqQP5ulnGYSVXLxncAev/MIGSXpSQgonHwJsLSYShqyzhlPb3 4AokET1Huev5cUKspS/5GENzQC+dYgf0/2EHM+l146ilS9b0a7l2bsAv4nDWIkl9 FvjC4GQqrXan9eIzgxU9QB7vOuCG0g3dJf4lpBZf903F5tWfohAMpa2ESUd8uanD fZp5BqL0qTge8cYjrti+Qdq8OFOFtKQw7qgmkEMeT70avE8+BaAGNfvHwkV2dJux Lx/mxWT+krQ= =CeKu -----END PGP SIGNATURE-----