#ubuntu

Ubuntu Security Notice 6427-2 - USN-6427-1 fixed a vulnerability in .NET. This update provides the corresponding update for .NET 8. It was discovered that the .NET Kestrel web server did not properly handle HTTP/2 requests. A remote attacker could possibly use this issue to cause a denial of service.

Ubuntu Security Notice 6438-1 - Kevin Jones discovered that .NET did not properly process certain X.509 certificates. An attacker could possibly use this issue to cause a denial of service. It was discovered that the .NET Kestrel web server did not properly handle HTTP/2 requests. A remote attacker could possibly use this issue to cause a denial of service.

Ubuntu Security Notice 6374-2 - USN-6374-1 fixed vulnerabilities in Mutt. This update provides the corresponding updates for Ubuntu 23.10. It was discovered that Mutt incorrectly handled certain email header contents. If a user were tricked into opening a specially crafted message, a remote attacker could possibly use this issue to cause a denial of service.

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.

Without the proper context, organizations waste time mitigating software flaws that won't likely affect their systems.

Ubuntu Security Notice 6165-2 - USN-6165-1 fixed vulnerabilities in GLib. This update provides the corresponding updates for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. It was discovered that GLib incorrectly handled non-normal GVariants. An attacker could use this issue to cause GLib to crash, resulting in a denial of service, or perform other unknown attacks.

Ubuntu Security Notice 6435-1 - It was discovered that OpenSSL incorrectly handled excessively large Diffie-Hellman parameters. An attacker could possibly use this issue to cause a denial of service. Bernd Edlinger discovered that OpenSSL incorrectly handled excessively large Diffie-Hellman parameters. An attacker could possibly use this issue to cause a denial of service.

gifsicle-1.94 was found to have a floating point exception (FPE) vulnerability via resize_stream at src/xform.c.

Ubuntu Security Notice 6396-3 - It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread. A local attacker could possibly use this to expose sensitive information. Daniel Moghimi discovered that some Intel Processors did not properly clear microarchitectural state after speculative execution of various instructions. A local unprivileged user could use this to obtain to sensitive information.

Ubuntu Security Notice 6433-1 - It was discovered that Ghostscript incorrectly handled certain PDF documents. If a user or automated system were tricked into opening a specially crafted PDF file, a remote attacker could use this issue to execute arbitrary code.