CVE-2021-20197: Race Condition
First published: Thu Jan 07 2021(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| GNU Binutils | <=2.35 | |
| Redhat Enterprise Linux | =8.0 | |
| Netapp Cloud Backup | ||
| NetApp ONTAP Select Deploy administration utility | ||
| IBM Cloud Pak for Business Automation | ||
| Broadcom Brocade Fabric Operating System Firmware |
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Reference Links
Frequently Asked Questions
What is CVE-2021-20197?
CVE-2021-20197 is a vulnerability in GNU binutils version 2.35 and earlier, which allows an unprivileged user to trick a privileged user into overwriting arbitrary files.
How severe is CVE-2021-20197?
CVE-2021-20197 has a severity rating of 6.3 (medium).
Which utilities in GNU binutils are affected by CVE-2021-20197?
The following utilities in GNU binutils version 2.35 and earlier are affected: ar, objcopy, strip, ranlib.
Which operating systems are affected by CVE-2021-20197?
The affected operating systems include Redhat Enterprise Linux 8.0, Netapp Cloud Backup, NetApp ONTAP Select Deploy administration utility, Netapp Solidfire & Hci Management Node, and Broadcom Brocade Fabric Operating System Firmware.
Are there any references for CVE-2021-20197?
Yes, you can find more information about CVE-2021-20197 at the following references: [Link 1], [Link 2], [Link 3].
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- vendor/gnu
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- canonical/redhat enterprise linux
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- vendor/netapp
- canonical/netapp cloud backup
- canonical/netapp ontap select deploy administration utility
- canonical/netapp solidfire \& hci management node
- vendor/broadcom
- canonical/broadcom brocade fabric operating system firmware