#ubuntu

Ubuntu Security Notice 7085-1 - Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled certain memory operations in the X Keyboard Extension. An attacker could use this issue to cause the X Server to crash, leading to a denial of service, or possibly execute arbitrary code.

Ubuntu Security Notice 7084-1 - It was discovered that urllib3 didn't strip HTTP Proxy-Authorization header on cross-origin redirects. A remote attacker could possibly use this issue to obtain sensitive information.

Booked Scheduler version 2.8.5 suffers from cross site scripting and open redirection vulnerabilities.

Ubuntu Security Notice 7064-2 - USN-7064-1 fixed a vulnerability in nano. This update provides the corresponding update for Ubuntu 14.04 LTS. It was discovered that nano allowed a possible privilege escalation through an insecure temporary file. If nano was killed while editing, the permissions granted to the emergency save file could be used by an attacker to escalate privileges using a malicious symlink.

### Summary A kyverno ClusterPolicy, ie. "disallow-privileged-containers," can be overridden by the creation of a PolicyException in a random namespace. ### Details By design, PolicyExceptions are consumed from any namespace. Administrators may not recognize that this allows users with privileges to non-kyverno namespaces to create exceptions. ### PoC 1. Administrator creates "disallow-privileged-containers" ClusterPolicy that applies to resources in the namespace "ubuntu-restricted" 2. Cluster user creates a PolicyException object for "disallow-privileged-containers" in namespace "ubuntu-restricted" 3. Cluster user creates a pod with a privileged container in "ubuntu-restricted" 4. Cluster user escalates to root on the node from the privileged container ### Impact Administrators attempting to enforce cluster security through kyverno policies, but that allow less privileged users to create resources

Ubuntu Security Notice 7082-1 - Gerrard Tai discovered that libheif did not properly validate certain images, leading to out-of-bounds read and write vulnerability. If a user or automated system were tricked into opening a specially crafted file, an attacker could possibly use this issue to cause a denial of service or to obtain sensitive information.

Ubuntu Security Notice 7081-1 - It was discovered that the Go net/http module did not properly handle responses to requests with an "Expect: 100-continue" header under certain circumstances. An attacker could possibly use this issue to cause a denial of service. It was discovered that the Go parser module did not properly handle deeply nested literal values. An attacker could possibly use this issue to cause a panic resulting in a denial of service.

Ubuntu Security Notice 7079-1 - Several security issues were discovered in the WebKitGTK Web and JavaScript engines. If a user were tricked into viewing a malicious website, a remote attacker could exploit a variety of issues related to web browser security, including cross-site scripting attacks, denial of service attacks, and arbitrary code execution.

Ubuntu Security Notice 7080-1 - Toshifumi Sakaguchi discovered that Unbound incorrectly handled name compression for large RRsets, which could lead to excessive CPU usage. An attacker could potentially use this issue to cause a denial of service by sending specially crafted DNS responses.

Ubuntu Security Notice 7078-1 - Atte Kettunen discovered that Firefox did not properly validate before inserting ranges into the selection node cache. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code.