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Link Following Affecting binutils package, versions <0:2.30-108.el8

0.0
medium

Snyk CVSS

    Attack Complexity High
    Scope Changed

    Threat Intelligence

    EPSS 0.05% (15th percentile)
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NVD
6.3 medium
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SUSE
6.3 medium
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Red Hat
4.2 medium

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  • Snyk ID SNYK-CENTOS8-BINUTILS-1959314
  • published 26 Jul 2021
  • disclosed 7 Jan 2021
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Introduced: 7 Jan 2021

CVE-2021-20197 Open this link in a new tab
CWE-59 Open this link in a new tab

How to fix?

Upgrade Centos:8 binutils to version 0:2.30-108.el8 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream binutils package and not the binutils package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

There is an open race window when writing output in the following utilities in GNU binutils version 2.35 and earlier:ar, objcopy, strip, ranlib. When these utilities are run as a privileged user (presumably as part of a script updating binaries across different users), an unprivileged user can trick these utilities into getting ownership of arbitrary files through a symlink.