cve/2021/CVE-2021-20197.md

CVE-2021-20197

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.

POC

Reference

No PoCs from references.

Github

• https://github.com/fokypoky/places-list