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Ubuntu Security Notice USN-4426-1
Posted Jul 22, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4426-1 - Jason A. Donenfeld discovered that the ACPI implementation in the Linux kernel did not properly restrict loading SSDT code from an EFI variable. A privileged attacker could use this to bypass Secure Boot lockdown restrictions and execute arbitrary code in the kernel. Fan Yang discovered that the mremap implementation in the Linux kernel did not properly handle DAX Huge Pages. A local attacker with access to DAX storage could use this to gain administrative privileges. Various other issues were also addressed.

tags | advisory, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2019-20908, CVE-2020-10757, CVE-2020-11935, CVE-2020-15780
SHA-256 | c08d99828ab0121536e6f7fbfa804274851e82d4f947dc4c837c3f5da9f63b08

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