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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.2316 USN-4040-1: Expat vulnerability and USN-4040-2: Expat vulnerability 27 June 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Expat Publisher: Ubuntu Operating System: Ubuntu Linux variants Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-20843 Original Bulletin: https://usn.ubuntu.com/4040-1/ https://usn.ubuntu.com/4040-2/ 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 Expat check for an updated version of the software for their operating system. - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4040-1: Expat vulnerability 26 June 2019 expat vulnerability A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 19.04 o Ubuntu 18.10 o Ubuntu 18.04 LTS o Ubuntu 16.04 LTS Summary Expat could be made to consume a high amount of RAM and CPU resources if it received a specially crafted XML file. Software Description o expat - XML parsing C library Details It was discovered that Expat incorrectly handled certain XML files. An attacker could possibly use this issue to cause a denial of service. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 19.04 libexpat1 - 2.2.6-1ubuntu0.19.04 Ubuntu 18.10 libexpat1 - 2.2.6-1ubuntu0.18.10 Ubuntu 18.04 LTS libexpat1 - 2.2.5-3ubuntu0.1 Ubuntu 16.04 LTS lib64expat1 - 2.1.0-7ubuntu0.16.04.4 libexpat1 - 2.1.0-7ubuntu0.16.04.4 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 CVE-2018-20843 - ---- USN-4040-2: Expat vulnerability 26 June 2019 expat vulnerability A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 14.04 ESM o Ubuntu 12.04 ESM Summary Expat could be made to consume a high amount of RAM and CPU resources if it received a specially crafted XML file. Software Description o expat - XML parsing C library Details USN-4040-1 fixed a vulnerability in expat. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. Original advisory details: It was discovered that Expat incorrectly handled certain XML files. An attacker could possibly use this issue to cause a denial of service. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 ESM lib64expat1 - 2.1.0-4ubuntu1.4+esm1 libexpat1 - 2.1.0-4ubuntu1.4+esm1 Ubuntu 12.04 ESM lib64expat1 - 2.0.1-7.2ubuntu1.6 libexpat1 - 2.0.1-7.2ubuntu1.6 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-4040-1 o CVE-2018-20843 - --------------------------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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