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security advisorygentooprivilege escalation

Fedora: 2023:01:20 Warning: CPU Memory Corruption Detected

An integer underflow in sgdisk from GPT fdisk package might allow local attacker(s) to escalate privileges.. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 202105-03 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: GPT fdisk: Integer underflow Date: May 26, 2021 Bugs: #768762 ID: 202105-03 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======= An integer underflow in sgdisk from GPT fdisk package might allow local attacker(s) to escalate privileges. Background ========= GPT fdisk (consisting of the gdisk, cgdisk, sgdisk, and fixparts programs) is a set of text-mode partitioning tools for Linux, FreeBSD, Mac OS X, and Windows. Affected packages ================ ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 sys-apps/gptfdisk < 1.0.6 > = 1.0.6 Description ========== It was discovered that ReadLogicalParts() function in basicmbr.cc was missing a bounds check. Impact ===== A local attacker could entice a user to insert a malicious formatted block device (USB stick or SD card for example), that, when processed with sgdisk, possibly resulting in local escalation of privileges or a Denial of Service condition. Workaround ========= There is no known workaround at this time. Resolution ========= All GPT fdisk users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose "> =sys-apps/gptfdisk-1.0.6" References ========= [ 1 ] CVE-2021-0308 https://nvd.nist.gov/vuln/detail/CVE-2021-0308 Availability =========== This GLSA andany updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202105-03 Concerns? ======== Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to This email address is being protected from spambots. You need JavaScript enabled to view it. or alternatively, you may file a bug at https://bugs.gentoo.org. License ====== Copyright 2021 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. https://creativecommons.org/licenses/by-sa/2.5/ . A buffer overflow in the XYZ package could permit remote adversaries to gain unauthorized access on Ubuntu platforms.. Gentoo Linux,GPT fdisk,Privilege Escalation,Integer Underflow. . LinuxSecurity.com Team

May 26, 2021 Gentoo