Ubuntu security

USN-5667-1: Linux kernel vulnerabilities Selim Enes Karaduman discovered that a race condition existed in the General notification queue implementation of the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-1882) Pawan Kumar Gupta, Alyssa Milburn, Amit Peled, Shani Rehana, Nir Shildan and Ariel Sabba discovered that some Intel processors with Enhanced Indirect Branch Restricted Speculation (eIBRS) did not properly handle RET instructions after a VM exits. A local attacker could potentially use this to expose sensitive information. (CVE-2022-26373) Eric Biggers discovered that a use-after-free vulnerability existed in the io_uring subsystem in the Linux kernel. A local attacker could possibly use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-3176) It was discovered that the Netlink Transformation [ more… ]

USN-5665-1: PCRE vulnerabilities It was discovered that PCRE incorrectly handled certain regular expressions. A remote attacker could use this issue to cause applications using PCRE to crash, resulting in a denial of service. (CVE-2017-6004) It was discovered that PCRE incorrectly handled certain Unicode encoding. A remote attacker could use this issue to cause applications using PCRE to crash, resulting in a denial of service. (CVE-2017-7186) Source: USN-5665-1: PCRE vulnerabilities

USN-5666-1: OpenSSH vulnerability It was discovered that OpenSSH incorrectly handled certain helper programs. An attacker could possibly use this issue to arbitrary code execution. Source: USN-5666-1: OpenSSH vulnerability

USN-5663-1: Thunderbird vulnerabilities Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, spoof the mouse pointer position, obtain sensitive information, spoof the contents of the addressbar, bypass security restrictions, or execute arbitrary code. (CVE-2022-2505, CVE-2022-36318, CVE-2022-36319, CVE-2022-38472, CVE-2022-38473, CVE-2022-38476 CVE-2022-38477, CVE-2022-38478) Multiple security issues were discovered in Thunderbird. An attacker could potentially exploit these in order to determine when a user opens a specially crafted message. (CVE-2022-3032, CVE-2022-3034) It was discovered that Thunderbird did not correctly handle HTML messages that contain a meta tag in some circumstances. If a user were tricked into replying to a specially crafted message, an attacker could potentially exploit this to obtain sensitive information. (CVE-2022-3033) A security issue was discovered [ more… ]

USN-5371-3: nginx vulnerability USN-5371-1 and USN-5371-2 fixed several vulnerabilities in nginx. This update provides the corresponding update for CVE-2020-11724 for Ubuntu 16.04 ESM. Original advisory details: It was discovered that nginx Lua module mishandled certain inputs. An attacker could possibly use this issue to perform an HTTP Request Smuggling attack. This issue was fixed for Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-11724) It was discovered that nginx Lua module mishandled certain inputs. An attacker could possibly use this issue to disclose sensitive information. This issue only affects Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-36309) It was discovered that nginx mishandled the use of compatible certificates among multiple encryption protocols. If a remote attacker were able to intercept the communication, this issue could be used to redirect traffic between subdomains. (CVE-2021-3618) Source: USN-5371-3: nginx vulnerability