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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.1136 USN-3935-1: BusyBox vulnerabilities 4 April 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: BusyBox Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Access Privileged Data -- Remote/Unauthenticated Execute Arbitrary Code/Commands -- Remote with User Interaction Modify Arbitrary Files -- Remote with User Interaction Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2019-5747 CVE-2018-1000517 CVE-2018-20679 CVE-2017-16544 CVE-2017-15873 CVE-2016-2148 CVE-2016-2147 CVE-2015-9261 CVE-2014-9645 CVE-2011-5325 Reference: ESB-2019.0594 ESB-2017.0518 ESB-2016.2783 ESB-2018.2183.3 Original Bulletin: https://usn.ubuntu.com/3935-1/ - --------------------------BEGIN INCLUDED TEXT-------------------- USN-3935-1: BusyBox vulnerabilities 3 April 2019 busybox vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 18.10 o Ubuntu 18.04 LTS o Ubuntu 16.04 LTS o Ubuntu 14.04 LTS Summary Several security issues were fixed in BusyBox. Software Description o busybox - Tiny utilities for small and embedded systems Details Tyler Hicks discovered that BusyBox incorrectly handled symlinks inside tar archives. If a user or automated system were tricked into processing a specially crafted tar archive, a remote attacker could overwrite arbitrary files outside of the current directory. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2011-5325) Mathias Krause discovered that BusyBox incorrectly handled kernel module loading restrictions. A local attacker could possibly use this issue to bypass intended restrictions. This issue only affected Ubuntu 14.04 LTS. (CVE-2014-9645) It was discovered that BusyBox incorrectly handled certain ZIP archives. If a user or automated system were tricked into processing a specially crafted ZIP archive, a remote attacker could cause BusyBox to crash, leading to a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2015-9261) Nico Golde discovered that the BusyBox DHCP client incorrectly handled certain malformed domain names. A remote attacker could possibly use this issue to cause the DHCP client to crash, leading to a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-2147) Nico Golde discovered that the BusyBox DHCP client incorrectly handled certain 6RD options. A remote attacker could use this issue to cause the DHCP client to crash, leading to a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-2148) It was discovered that BusyBox incorrectly handled certain bzip2 archives. If a user or automated system were tricked into processing a specially crafted bzip2 archive, a remote attacker could cause BusyBox to crash, leading to a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2017-15873) It was discovered that BusyBox incorrectly handled tab completion. A local attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2017-16544) It was discovered that the BusyBox wget utility incorrectly handled certain responses. A remote attacker could use this issue to cause BusyBox to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2018-1000517) It was discovered that the BusyBox DHCP utilities incorrectly handled certain memory operations. A remote attacker could possibly use this issue to access sensitive information. (CVE-2018-20679, CVE-2019-5747) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 18.10 busybox - 1:1.27.2-2ubuntu4.1 busybox-initramfs - 1:1.27.2-2ubuntu4.1 busybox-static - 1:1.27.2-2ubuntu4.1 udhcpc - 1:1.27.2-2ubuntu4.1 udhcpd - 1:1.27.2-2ubuntu4.1 Ubuntu 18.04 LTS busybox - 1:1.27.2-2ubuntu3.2 busybox-initramfs - 1:1.27.2-2ubuntu3.2 busybox-static - 1:1.27.2-2ubuntu3.2 udhcpc - 1:1.27.2-2ubuntu3.2 udhcpd - 1:1.27.2-2ubuntu3.2 Ubuntu 16.04 LTS busybox - 1:1.22.0-15ubuntu1.4 busybox-initramfs - 1:1.22.0-15ubuntu1.4 busybox-static - 1:1.22.0-15ubuntu1.4 udhcpc - 1:1.22.0-15ubuntu1.4 udhcpd - 1:1.22.0-15ubuntu1.4 Ubuntu 14.04 LTS busybox - 1:1.21.0-1ubuntu1.4 busybox-initramfs - 1:1.21.0-1ubuntu1.4 busybox-static - 1:1.21.0-1ubuntu1.4 udhcpc - 1:1.21.0-1ubuntu1.4 udhcpd - 1:1.21.0-1ubuntu1.4 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-2011-5325 o CVE-2014-9645 o CVE-2015-9261 o CVE-2016-2147 o CVE-2016-2148 o CVE-2017-15873 o CVE-2017-16544 o CVE-2018-1000517 o CVE-2018-20679 o CVE-2019-5747 - --------------------------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. 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