#ubuntu

Ubuntu Security Notice 5665-1 - 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. 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.

Ubuntu Security Notice 5666-1 - It was discovered that OpenSSH incorrectly handled certain helper programs. An attacker could possibly use this issue to arbitrary code execution.

A flaw in unpatched Zimbra email servers could allow attackers to obtain remote code execution by pushing malicious files past filters.

Ubuntu Security Notice 5663-1 - 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.

Ubuntu Security Notice 5371-3 - 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. 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. 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. 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.

Mitigation guidance provided while a patch is being developed

A severe remote code execution vulnerability in Zimbra's enterprise collaboration software and email platform is being actively exploited, with no patch currently available to remediate the issue. The shortcoming, assigned CVE-2022-41352, carries a critical-severity rating of CVSS 9.8, providing a pathway for attackers to upload arbitrary files and carry out malicious actions on affected

Ubuntu Security Notice 5661-1 - It was discovered that LibreOffice incorrectly validated macro signatures. If a user were tricked into opening a specially crafted document, a remote attacker could possibly use this issue to execute arbitrary macros. It was discovered that Libreoffice incorrectly handled encrypting the master key provided by the user for storing passwords for web connections. A local attacker could possibly use this issue to obtain access to passwords stored in the user's configuration data.

In certain Nedi products, a vulnerability in the web UI of NeDi login & Community login could allow an unauthenticated, remote attacker to affect the integrity of a device via a User Enumeration vulnerability. The vulnerability is due to insecure design, where a difference in forgot password utility could allow an attacker to determine if the user is valid or not, enabling a brute force attack with valid users. This affects NeDi 1.0.7 for OS X 1.0.7 <= and NeDi for Suse 1.0.7 <= and NeDi for FreeBSD 1.0.7 <=.

Ubuntu Security Notice 5659-1 - Stephane Chauveau discovered that kitty incorrectly handled image filenames with special characters in error messages. A remote attacker could possibly use this to execute arbitrary commands. This issue only affected Ubuntu 20.04 LTS. Carter Sande discovered that kitty incorrectly handled escape sequences in desktop notifications. A remote attacker could possibly use this to execute arbitrary commands. This issue only affected Ubuntu 22.04 LTS.