CVE-2021-20197 Information

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.

CVSS Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Reference

https://bugzilla.redhat.com/show_bug.cgi?id=1913743 https://sourceware.org/bugzilla/show_bug.cgi?id=26945 https://security.netapp.com/advisory/ntap-20210528-0009/

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

NONE

Base Severity

6.3