[월:] 2021년 02월

USN-4748-1: Linux kernel vulnerabilities It was discovered that the jfs file system implementation in the Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to possibly cause a denial of service (system crash). (CVE-2020-27815) It was discovered that the memory management subsystem in the Linux kernel did not properly handle copy-on-write operations in some situations. A local attacker could possibly use this to gain unintended write access to read-only memory pages. (CVE-2020-29374) Michael Kurth and Pawel Wieczorkiewicz discovered that the Xen event processing backend in the Linux kernel did not properly limit the number of events queued. An attacker in a guest VM could use this to cause a denial of service in the host OS. (CVE-2020-29568) Jann Horn discovered that the tty subsystem of the Linux kernel did not use consistent locking in some situations, [ more… ]

USN-4747-2: GNU Screen vulnerability USN-4747-1 fixed a vulnerability in screen. This update provides the corresponding update for Ubuntu 14.04 ESM. Original advisory details: Felix Weinmann discovered that GNU Screen incorrectly handled certain character sequences. A remote attacker could use this issue to cause GNU Screen to crash, resulting in a denial of service, or possibly execute arbitrary code. Source: USN-4747-2: GNU Screen vulnerability