These are the Ubuntu security notices that affect the current supported releases of Ubuntu. These notices are also posted to the ubuntu-security-announce mailing list (list archive). To report a security vulnerability in an Ubuntu package, please contact the Ubuntu Security Team. You may also be interested in learning about Ubuntu security policies. For more details on a specific CVE or source package, please see the Ubuntu CVE Tracker.

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Latest notices

USN-4167-1: Samba vulnerabilities

Michael Hanselmann discovered that the Samba client code incorrectly handled path separators. If a user were tricked into connecting to a malicious server, a remote attacker could use this issue to cause the client to access local pathnames instead of network pathnames. (CVE-2019-10218) Simon Fonteneau and Bj√∂rn Baumbach discovered that Samba…

29 October 2019 | ubuntu-19.10, ubuntu-19.04, ubuntu-18.04-lts, ubuntu-16.04-lts

USN-4166-2: PHP vulnerability

USN-4166-1 fixed a vulnerability in PHP. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. Original advisory details: It was discovered that PHP incorrectly handled certain paths when being used in FastCGI configurations. A remote attacker could possibly use this issue to execute arbitrary code.

29 October 2019 | ubuntu-14.04-esm, ubuntu-12.04-esm

USN-4166-1: PHP vulnerability

It was discovered that PHP incorrectly handled certain paths when being used in FastCGI configurations. A remote attacker could possibly use this issue to execute arbitrary code.

28 October 2019 | ubuntu-19.10, ubuntu-19.04, ubuntu-18.04-lts, ubuntu-16.04-lts

USN-4165-1: Firefox vulnerabilities

Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, bypass security restrictions, bypass same-origin restrictions, conduct cross-site scripting (XSS) attacks, bypass content security policy (CSP)…

23 October 2019 | ubuntu-19.10, ubuntu-19.04, ubuntu-18.04-lts, ubuntu-16.04-lts

USN-4162-2: Linux kernel (Azure) vulnerabilities

USN-4162-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the corresponding updates for the Linux kernel for Microsoft Azure Cloud systems for Ubuntu 14.04 ESM. It was discovered that the RSI 91x Wi-Fi driver in the Linux kernel did not did not handle detach operations correctly, leading to a…

23 October 2019 | ubuntu-14.04-esm

USN-4163-2: Linux kernel (Xenial HWE) vulnerabilities

USN-4163-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 ESM. It was discovered that a race condition existed in the ARC EMAC ethernet driver for the Linux kernel, resulting in a use-after-free…

23 October 2019 | ubuntu-14.04-esm

USN-4164-1: Libxslt vulnerabilities

It was discovered that Libxslt incorrectly handled certain documents. An attacker could possibly use this issue to access sensitive information. This issue not affected Ubuntu 19.10. (CVE-2019-13117, CVE-2019-13118) It was discovered that Libxslt incorrectly handled certain documents. An attacker could possibly use this issue to execute arbitrary…

22 October 2019 | ubuntu-19.10, ubuntu-19.04, ubuntu-18.04-lts, ubuntu-16.04-lts, ubuntu-14.04-esm, ubuntu-12.04-esm

USN-4163-1: Linux kernel vulnerabilities

It was discovered that a race condition existed in the ARC EMAC ethernet driver for the Linux kernel, resulting in a use-after-free vulnerability. An attacker could use this to cause a denial of service (system crash). (CVE-2016-10906) It was discovered that a race condition existed in the Serial Attached SCSI (SAS) implementation in the Linux…

22 October 2019 | ubuntu-16.04-lts

USN-4162-1: Linux kernel vulnerabilities

It was discovered that the RSI 91x Wi-Fi driver in the Linux kernel did not did not handle detach operations correctly, leading to a use-after-free vulnerability. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-21008) Wen Huang discovered that the Marvell…

22 October 2019 | ubuntu-18.04-lts, ubuntu-16.04-lts

USN-4157-2: Linux kernel (HWE) vulnerabilities

USN-4157-1 fixed vulnerabilities in the Linux kernel for Ubuntu 19.04. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 19.04 for Ubuntu 18.04 LTS. Wen Huang discovered that the Marvell Wi-Fi device driver in the Linux kernel did not properly perform bounds checking, leading to a…

22 October 2019 | ubuntu-18.04-lts