Fedora: 2023:01:20 Warning: CPU Memory Corruption Detected
gentoo
May 26, 2021
An integer underflow in sgdisk from GPT fdisk package might allow local attacker(s) to escalate privileges.
Summary
It was discovered that ReadLogicalParts() function in basicmbr.cc was missing a bounds check.
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 and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/202105-03
style>.gentoo_availability{display:block;}
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 https://bugs.gentoo.org.
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Severity: Normal
Title: GPT fdisk: Integer underflow
Date: May 26, 2021
Bugs: #768762
ID: 202105-03
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.
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Affected Packages
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 sys-apps/gptfdisk < 1.0.6 >= 1.0.6
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.
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