CVE-2021-20197

 

Published at: - 26-03-2021 06:15

Last modified: - 15-08-2022 01:15

Total changes: - 5

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.

Common Vulnerability Scoring System (CVSS)

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

 

Verification logic

 

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/
• GLSA-202208-30-

 

Keywords

NVD

 

CVE-2021-20197

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures