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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.0183 spice-vdagent security update 15 January 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: spice-vdagent Publisher: Debian Operating System: Debian GNU/Linux Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Denial of Service -- Existing Account Access Confidential Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2020-25653 CVE-2020-25652 CVE-2020-25651 CVE-2020-25650 CVE-2017-15108 Reference: ASB-2020.0026 ESB-2021.0071 ESB-2020.4034 ESB-2020.4029.2 Original Bulletin: https://www.debian.org/lts/security/2021/dla-2524 - --------------------------BEGIN INCLUDED TEXT-------------------- - ------------------------------------------------------------------------- Debian LTS Advisory DLA-2524-1 debian-lts@lists.debian.org https://www.debian.org/lts/security/ Abhijith PA January 13, 2021 https://wiki.debian.org/LTS - ------------------------------------------------------------------------- Package : spice-vdagent Version : 0.17.0-1+deb9u1 CVE ID : CVE-2017-15108 CVE-2020-25650 CVE-2020-25651 CVE-2020-25652 CVE-2020-25653 Debian Bug : 883238 973769 Several vulnerabilities were discovered in spice-vdagent, a spice guest agent for enchancing SPICE integeration and experience. CVE-2017-15108 spice-vdagent does not properly escape save directory before passing to shell, allowing local attacker with access to the session the agent runs in to inject arbitrary commands to be executed. CVE-2020-25650 A flaw was found in the way the spice-vdagentd daemon handled file transfers from the host system to the virtual machine. Any unprivileged local guest user with access to the UNIX domain socket path `/run/spice-vdagentd/spice-vdagent-sock` could use this flaw to perform a memory denial of service for spice-vdagentd or even other processes in the VM system. The highest threat from this vulnerability is to system availability. This flaw affects spice-vdagent versions 0.20 and previous versions. CVE-2020-25651 A flaw was found in the SPICE file transfer protocol. File data from the host system can end up in full or in parts in the client connection of an illegitimate local user in the VM system. Active file transfers from other users could also be interrupted, resulting in a denial of service. The highest threat from this vulnerability is to data confidentiality as well as system availability. CVE-2020-25652 A flaw was found in the spice-vdagentd daemon, where it did not properly handle client connections that can be established via the UNIX domain socket in `/run/spice-vdagentd/spice-vdagent-sock`. Any unprivileged local guest user could use this flaw to prevent legitimate agents from connecting to the spice-vdagentd daemon, resulting in a denial of service. The highest threat from this vulnerability is to system availability. CVE-2020-25653 A race condition vulnerability was found in the way the spice-vdagentd daemon handled new client connections. This flaw may allow an unprivileged local guest user to become the active agent for spice-vdagentd, possibly resulting in a denial of service or information leakage from the host. The highest threat from this vulnerability is to data confidentiality as well as system availability. For Debian 9 stretch, these problems have been fixed in version 0.17.0-1+deb9u1. We recommend that you upgrade your spice-vdagent packages. For the detailed security status of spice-vdagent please refer to its security tracker page at: https://security-tracker.debian.org/tracker/spice-vdagent Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS - --------------------------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 iQIVAwUBYAD0guNLKJtyKPYoAQhQwxAAmkdYxb1gFPKNfTZfozrCb6w6MqdrIMMP QY6irNkcomEwUFFs670qxvhKw9jk03OrqICW02gnnHgNzrZDwmyFBFz8DYJtSqYj xNqsT2s3gr4ya+dmnvT8wR/FJGEinzkST0J1dPWBLVtJMiKpN94MuT7MO3ejoTZH ixa4mwioGzlEwsCcWEai0tphVqrMr5+/vlEegTVXlFqOMAJkxXNw7vRgMRrcRD77 htORROYwjKJ/9nt+qa3OOqhOLXC0PGfGAAkIEgGKr9luhKTTbMP+oSc5hy04u2C5 DmFJyILqa5RC3nCOkFw3jzjrK388K7Bg8XmdDbVyPjNyp9feCDMccVPHXtlYTo+M vqrFFgwf9u/9BlPQPkGKvWxUnfwU0olK1aexCA7gnpCpHuHt4c+0NN8oMO/fGWBb zN0ZhQiVwDeUlJe7Xkc518mDskDpaRwH6ZejSbLc7OOVyukhpjtud2pLb/ytnZm/ YgzHuwEb9jG6348d2U7rtvkUnMu/9PonxHYtzn/G3beOCiLESLDkPqxob73mL+M3 48E1no37ZyuGNdbAIU1+QGt4KFKtUKqQxjpldthpgp4V7erCezsdcri7WOCyzh4b +UGvfnVS2R/BIb6lTPzyEXk+Plh4uwVq9X1esTblbY3uoJ8Q1Akhtm/r/y5Yu8KK NlphCrgvhO4= =ABoV -----END PGP SIGNATURE-----