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CVE-2021-20197

nvd nist
Published: Mar 26, 2021Modified: Jun 17, 2026

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6.3
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Exploitability: 1.0 / Impact: 5.2
Source: NVD

Description

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.

Affected (6)

Show all products
Gnu: Binutils · Redhat: Enterprise Linux · Broadcom: Brocade Fabric Operating System Firmware · Netapp: Cloud Backup, Ontap Select Deploy Administration Utility, Solidfire & Hci Management Node
Gnu
1 product
Binutils
Redhat
1 product
Enterprise Linux
Broadcom
1 product
Brocade Fabric Operating System Firmware
Netapp
3 products
Cloud Backup
Ontap Select Deploy Administration Utility
Solidfire & Hci Management Node
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Binutils
Up to 2.35
Configuration B
1 vulnerable
Vulnerable SoftwareAffected Versions
Enterprise Linux
Version 8.0
Configuration C
4 vulnerable
Vulnerable SoftwareAffected Versions
Brocade Fabric Operating System Firmware
All versions
Cloud Backup
All versions
Ontap Select Deploy Administration Utility
All versions
Solidfire & Hci Management Node
All versions

Related CWEs

CWE-362
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.
CWE-59
Improper Link Resolution Before File Access ('Link Following')
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

References (8)

Source: secalert@redhat.com
Issue TrackingPatchThird Party Advisory
Source: secalert@redhat.com
Third Party Advisory
Source: secalert@redhat.com
Third Party Advisory
Source: secalert@redhat.com
Issue TrackingPatchThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Issue TrackingPatchThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Issue TrackingPatchThird Party Advisory

Timeline

No history available yet.