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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.0239.3 USN-4247-1: python-apt vulnerabilities 24 January 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: python-apt Publisher: Ubuntu Operating System: Ubuntu UNIX variants (UNIX, Linux, OSX) Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2019-15796 CVE-2019-15795 Original Bulletin: https://usn.ubuntu.com/4247-2/ https://usn.ubuntu.com/4247-3/ Comment: This bulletin contains two (2) Ubuntu security advisories. This advisory references vulnerabilities in products which run on platforms other than Ubuntu. It is recommended that administrators running python-apt check for an updated version of the software for their operating system. Revision History: January 24 2020: Vendor released updated advisory USN-4247-3 January 23 2020: Updated packages due to regression January 23 2020: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4247-2: python-apt regression 22 January 2020 python-apt regression A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 19.10 o Ubuntu 19.04 o Ubuntu 18.04 LTS o Ubuntu 16.04 LTS Summary USN-4247-1 introduced a regression in python-apt. Software Description o python-apt - Python interface to libapt-pkg Details USN-4247-1 fixed vulnerabilities in python-apt. The updated packages caused a regression when attempting to upgrade to a new Ubuntu release. This update fixes the problem. We apologize for the inconvenience. Original advisory details: It was discovered that python-apt would still use MD5 hashes to validate certain downloaded packages. If a remote attacker were able to perform a man-in-the-middle attack, this flaw could potentially be used to install altered packages. (CVE-2019-15795) It was discovered that python-apt could install packages from untrusted repositories, contrary to expectations. (CVE-2019-15796) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 19.10 python-apt - 1.9.0ubuntu1.3 python3-apt - 1.9.0ubuntu1.3 Ubuntu 19.04 python-apt - 1.8.5~ubuntu0.3 python3-apt - 1.8.5~ubuntu0.3 Ubuntu 18.04 LTS python-apt - 1.6.5ubuntu0.2 python3-apt - 1.6.5ubuntu0.2 Ubuntu 16.04 LTS python-apt - 1.1.0~beta1ubuntu0.16.04.8 python3-apt - 1.1.0~beta1ubuntu0.16.04.8 To update your system, please follow these instructions: https:// wiki.ubuntu.com/Security/Upgrades . In general, a standard system update will make all the necessary changes. References o USN-4247-1 o LP: 1860606 - ------------------------------------------------------------------------------ USN-4247-3: python-apt vulnerabilities 23 January 2020 python-apt vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 14.04 ESM o Ubuntu 12.04 ESM Summary Several security issues were fixed in python-apt. Software Description o python-apt - Python interface to libapt-pkg Details USN-4247-1 fixed several vulnerabilities in python-apt. This update provides the corresponding updates for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. Original advisory details: It was discovered that python-apt would still use MD5 hashes to validate certain downloaded packages. If a remote attacker were able to perform a man-in-the-middle attack, this flaw could potentially be used to install altered packages. (CVE-2019-15795) It was discovered that python-apt could install packages from untrusted repositories, contrary to expectations. (CVE-2019-15796) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 ESM python-apt - 0.9.3.5ubuntu3+esm2 python3-apt - 0.9.3.5ubuntu3+esm2 Ubuntu 12.04 ESM python-apt - 0.8.3ubuntu7.5 python3-apt - 0.8.3ubuntu7.5 To update your system, please follow these instructions: https:// wiki.ubuntu.com/Security/Upgrades . In general, a standard system update will make all the necessary changes. References o USN-4247-1 o CVE-2019-15795 o CVE-2019-15796 - --------------------------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). 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