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alpinelinuxAlpine Linux Development TeamALPINE:CVE-2021-20197
HistoryMar 26, 2021 - 5:15 p.m.

CVE-2021-20197

2021-03-2617:15:00
Alpine Linux Development Team
security.alpinelinux.org
14

0.0004 Low

EPSS

Percentile

15.8%

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.

OSVersionArchitecturePackageVersionFilename
Alpine3.12-mainnoarchbinutils= 2.34-r2UNKNOWN
Alpine3.11-mainnoarchbinutils= 2.33.1-r1UNKNOWN
Alpine3.10-mainnoarchbinutils= 2.32-r1UNKNOWN