VULNERABILITY INTELLIGENCE

CVE-2021-20197

CVSS score6.3 MEDIUM
EPSS probability0.30%
CISA KEVNot currently listed
Published2021-03-26
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

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.

Weakness classification

  • secalert@redhat.com: CWE-59
  • nvd@nist.gov: CWE-59

Primary references