ubuntu-usn

USN-3874-1: Firefox vulnerabilities firefox vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 18.10 Ubuntu 18.04 LTS Ubuntu 16.04 LTS Ubuntu 14.04 LTS Summary Firefox could be made to crash or run programs as your login if it opened a malicious website. Software Description firefox – Mozilla Open Source web browser Details 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, gain additional privileges by escaping the sandbox, or execute arbitrary code. (CVE-2018-18500, CVE-2018-18501, CVE-2018-18502, CVE-2018-18503, CVE-2018-18504, CVE-2018-18505) It was discovered that Firefox allowed PAC files to specify that requests to localhost are sent through the proxy to another server. If proxy auto-detection is enabled, an attacker could potentially exploit this to conduct attacks [ more… ]

USN-3873-1: Open vSwitch vulnerabilities openvswitch vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 18.04 LTS Ubuntu 16.04 LTS Summary Several security issues were fixed in Open vSwitch. Software Description openvswitch – Ethernet virtual switch Details It was discovered that Open vSwitch incorrectly decoded certain packets. A remote attacker could possibly use this issue to cause Open vSwitch to crash, resulting in a denial of service. (CVE-2018-17204) It was discovered that Open vSwitch incorrectly handled processing certain flows. A remote attacker could possibly use this issue to cause Open vSwitch to crash, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-17205) It was discovered that Open vSwitch incorrectly handled BUNDLE action decoding. A remote attacker could possibly use this issue to cause Open vSwitch to crash, resulting in a denial of [ more… ]

USN-3872-1: Linux kernel (HWE) vulnerabilities linux-hwe vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 18.04 LTS Summary Several security issues were fixed in the Linux kernel. Software Description linux-hwe – Linux hardware enablement (HWE) kernel Details It was discovered that a race condition existed in the vsock address family implementation of the Linux kernel that could lead to a use-after-free condition. A local attacker in a guest virtual machine could use this to expose sensitive information (host machine kernel memory). (CVE-2018-14625) Cfir Cohen discovered that a use-after-free vulnerability existed in the KVM implementation of the Linux kernel, when handling interrupts in environments where nested virtualization is in use (nested KVM virtualization is not enabled by default in Ubuntu kernels). A local attacker in a guest VM could possibly use this to gain administrative privileges in [ more… ]

USN-3871-1: Linux kernel vulnerabilities linux vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 18.04 LTS Summary Several security issues were fixed in the Linux kernel. Software Description linux – Linux kernel Details Wen Xu discovered that a use-after-free vulnerability existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10876, CVE-2018-10879) Wen Xu discovered that a buffer overflow existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10877) Wen Xu discovered that an out-of-bounds write vulnerability existed in the ext4 [ more… ]

USN-3870-1: Spice vulnerability spice vulnerability A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 18.10 Ubuntu 18.04 LTS Ubuntu 16.04 LTS Ubuntu 14.04 LTS Summary Spice could be made to crash or run programs if it received specially crafted network traffic. Software Description spice – SPICE protocol client and server library Details Christophe Fergeau discovered that Spice incorrectly handled memory. A remote attacker could use this to cause Spice to crash, resulting in a denial of service, or possibly execute arbitrary code. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 18.10 libspice-server1 – 0.14.0-1ubuntu4.2 Ubuntu 18.04 LTS libspice-server1 – 0.14.0-1ubuntu2.4 Ubuntu 16.04 LTS libspice-server1 – 0.12.6-4ubuntu0.4 Ubuntu 14.04 LTS libspice-server1 – 0.12.4-0nocelt2ubuntu1.8 To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades. After a standard system update you need [ more… ]