CVE-2021-20197

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.

• CWE-59
• CWE-59
• CWE-362

• https://bugzilla.redhat.com/show_bug.cgi?id=1913743Issue Tracking, Patch, Third Party Advisory
• https://security.gentoo.org/glsa/202208-30Third Party Advisory
• https://security.netapp.com/advisory/ntap-20210528-0009/Third Party Advisory
• https://sourceware.org/bugzilla/show_bug.cgi?id=26945Issue Tracking, Patch, Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1913743Issue Tracking, Patch, Third Party Advisory
• https://security.gentoo.org/glsa/202208-30Third Party Advisory
• https://security.netapp.com/advisory/ntap-20210528-0009/Third Party Advisory
• https://sourceware.org/bugzilla/show_bug.cgi?id=26945Issue Tracking, Patch, Third Party Advisory

Published

Mar 26, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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