[gentoo-announce] [ GLSA 202105-03 ] GPT fdisk: Integer underflow

– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – Gentoo Linux Security Advisory GLSA 202105-03 – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – security.gentoo.org/ – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
Severity: Normal Title: GPT fdisk: Integer underflow Date: May 26, 2021 Bugs: #768762 ID: 202105-03
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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 nvd.nist.gov/vuln/detail/CVE-2021-0308
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
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 security@gentoo.org or alternatively, you may file a bug at 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.
creativecommons.org/licenses/by-sa/2.5