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