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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.0084 Cisco Jabber Client Framework Insecure Directory Permissions Vulnerability 10 January 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Jabber for Mac client Publisher: Cisco Systems Operating System: OS X Impact/Access: Modify Arbitrary Files -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2018-0449 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-jabr-mac-permissions - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Jabber Client Framework Insecure Directory Permissions Vulnerability Importance: Medium Advisory ID: cisco-sa-20190109-jabr-mac-permissions First Published: 2019 January 9 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvm60187 CVE-2018-0449 CWE-275 CVSS Score: Base 5.1 CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H/E:X/RL:X/RC:X Summary o A vulnerability in the Cisco Jabber Client Framework (JCF) software, installed as part of the Cisco Jabber for Mac client, could allow an authenticated, local attacker to corrupt arbitrary files on an affected device that has elevated privileges. The vulnerability exists due to insecure directory permissions set on a JCF created directory. An authenticated attacker with the ability to access an affected directory could create a hard link to an arbitrary location on the affected system. An attacker could convince another user that has administrative privileges to perform an install or update the Cisco Jabber for Mac client to perform such actions, allowing files to be created in an arbitrary location on the disk or an arbitrary file to be corrupted when it is appended to or overwritten. 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-20190109-jabr-mac-permissions Affected Products o Vulnerable Products This vulnerability affects Cisco Jabber Client for Mac OS. For information about affected software releases, consult the Cisco bug ID(s) at the top of this advisory. 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 For information about fixed software releases, consult the Cisco bug ID(s) at the top of this advisory. When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts 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. 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 Cisco would like to thank Drew Yao of Apple's Red Team for reporting this vulnerability. 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-20190109-jabr-mac-permissions Revision History o +----------+---------------------------+----------+--------+------------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+------------------+ | 1.0 | Initial public release. | -- | Final | 2019-January-09 | +----------+---------------------------+----------+--------+------------------+ - --------------------------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 iQIUAwUBXDbUbmaOgq3Tt24GAQh2dA/4j5YxKcDEx5riO0pmONieT17BS79E2FJn APxR8yRm06HScc/sPjY2Ey2xutTXvLdiZqTwM1ugMuFI5rFgmPaYqoWP2l798T74 nV2rVNdDY8xAe0sxCRGBg2Bq/eJJInpTZ4nFXv7T3DG/zywxBAMQ9UnrnuyTWsQZ vKboRNofboG3/zSPXJMo83pAfMm4ECO/BdjC2bJrDTiP1MUGC9lEUe690fCQ3E35 +wEOeoOAYNVXAK1pSzW8VTclIFhGa0x77VzBeyrVeSPkBJCUKpZi0laZMmOPA1ta kSzw246yvCCjf4BFGsbQUDp6ZW+BTkzhVUYKqxgRgT04OfYE8ObfVxVYgAtL/rHc ztetjC/91btDHxEzBqgUhs940OYj8HcblGodn3QJ4Hf6UXhvY9L/d5hM5ze8aQPS OJGemSHTENO2YBcPotX9imj6NDUi/NYOBpZKeAkN/l15CLP+we/EdoBrtlrXXJIg vAoSy44VUSSG2laj14Kv3Sj27oANTw2BnTh+zDEXh+EXUCimSpP+ANCdGHHt+QW9 ynwFOrKLV1dSdBrfJLqky0ZntDHVdnHQH2wkvsQnlAe9fR5JCNkgT5u4FfEMzN0V M6ZBXJ3BRQPAoUGMvoDGKgyEqyS633+hlDGJYeIRCTXvMwUn0ECM/NGvqUSNuimp 0cMSikHZEg== =Vwop -----END PGP SIGNATURE-----