[월:] 2021년 01월

USN-4713-1: Linux kernel vulnerability It was discovered that the LIO SCSI target implementation in the Linux kernel performed insufficient identifier checking in certain XCOPY requests. An attacker with access to at least one LUN in a multiple backstore environment could use this to expose sensitive information or modify data. Source: USN-4713-1: Linux kernel vulnerability

USN-4712-1: Linux kernel regression USN-4576-1 fixed a vulnerability in the overlay file system implementation in the Linux kernel. Unfortunately, that fix introduced a regression that could incorrectly deny access to overlay files in some situations. This update fixes the problem. We apologize for the inconvenience. Original vulnerability details: Giuseppe Scrivano discovered that the overlay file system in the Linux kernel did not properly perform permission checks in some situations. A local attacker could possibly use this to bypass intended restrictions and gain read access to restricted files. Source: USN-4712-1: Linux kernel regression

USN-4711-1: Linux kernel vulnerabilities It was discovered that the LIO SCSI target implementation in the Linux kernel performed insufficient identifier checking in certain XCOPY requests. An attacker with access to at least one LUN in a multiple backstore environment could use this to expose sensitive information or modify data. (CVE-2020-28374) Kiyin (尹亮) discovered that the perf subsystem in the Linux kernel did not properly deallocate memory in some situations. A privileged attacker could use this to cause a denial of service (kernel memory exhaustion). (CVE-2020-25704) Source: USN-4711-1: Linux kernel vulnerabilities

USN-4710-1: Linux kernel vulnerability Kiyin (尹亮) discovered that the perf subsystem in the Linux kernel did not properly deallocate memory in some situations. A privileged attacker could use this to cause a denial of service (kernel memory exhaustion). Source: USN-4710-1: Linux kernel vulnerability