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Ubuntu Security Notice 6416-3 - It was discovered that the IPv6 implementation in the Linux kernel contained a high rate of hash collisions in connection lookup table. A remote attacker could use this to cause a denial of service. Daniel Trujillo, Johannes Wikner, and Kaveh Razavi discovered that some AMD processors utilising speculative execution and branch prediction may allow unauthorised memory reads via a speculative side-channel attack. A local attacker could use this to expose sensitive information, including kernel memory.

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. In affected versions of `org.xwiki.platform:xwiki-platform-logging-ui` it is possible to trick a user with programming rights into visiting a constructed url where e.g., by embedding an image with this URL in a document that is viewed by a user with programming rights which will evaluate an expression in the constructed url and execute it. This issue has been addressed in versions 13.10.11, 14.4.7, and 14.10. Users are advised to upgrade. There are no known workarounds for this vulnerability.

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Starting in version 5.1-rc-1 and prior to versions 14.10.8 and 15.3-rc-1, any user who can edit their own user profile can execute arbitrary script macros including Groovy and Python macros that allow remote code execution including unrestricted read and write access to all wiki contents. This has been patched in XWiki 14.10.8 and 15.3-rc-1 by adding proper escaping. As a workaround, the patch can be manually applied to the document `Menu.UIExtensionSheet`; only three lines need to be changed.

The System Dashboard plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the sd_global_value() function hooked via an AJAX action in all versions up to, and including, 2.8.7. This makes it possible for authenticated attackers, with subscriber-level access and above, to retrieve sensitive global value information.

The System Dashboard plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the sd_db_specs() function hooked via an AJAX action in all versions up to, and including, 2.8.7. This makes it possible for authenticated attackers, with subscriber-level access and above, to retrieve data key specs.

Vyper is a pythonic smart contract language for the ethereum virtual machine. Since version 0.3.2, decimals use the full range of the underlying int168 type. multiplication of 168 bit integers can wrap in 256-bit arithmetic, but safemul does not check for that. This has been patched in v0.3.4. There are no known workarounds for this issue.

Non-transparent sharing of branch predictor within a context in some Intel(R) Processors may allow an authorized user to potentially enable information disclosure via local access.

An update is now available for OpenShift Logging (5.3.2) Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2020-36327: rubygem-bundler: Dependencies of gems with explicit source may be installed from a different source * CVE-2021-45105: log4j-core: DoS in log4j 2.x with Thread Context Map (MDC) input data contains a recursive lookup and context lookup pattern

Red Hat OpenShift Container Platform release 4.6.53 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red Hat OpenShift Container Platform 4.6. Red Hat Product Security has rated this update as having a security impact of Low. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2021-45105: log4j-core: DoS in log4j 2.x with Thread Context Map (MDC) input data contains a recursive lookup and context lookup pattern

This Tech Tip reminds developers and security teams to check what version of Java they are running. Whether they are vulnerable to the ECDSA flaw boils down to the version number.