Link Following Affecting binutils package, versions <0:2.30-108.el8
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Test your applications- Snyk ID SNYK-CENTOS8-BINUTILS-1959314
- published 26 Jul 2021
- disclosed 7 Jan 2021
Introduced: 7 Jan 2021
CVE-2021-20197 Open this link in a new tabHow 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.
References
- https://security.netapp.com/advisory/ntap-20210528-0009/
- https://access.redhat.com/security/cve/CVE-2021-20197
- https://bugzilla.redhat.com/show_bug.cgi?id=1913743
- https://sourceware.org/bugzilla/show_bug.cgi?id=26945
- https://access.redhat.com/errata/RHSA-2021:4364
- https://security.gentoo.org/glsa/202208-30