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CVE-2021-20197

Status Candidate

Overview

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.

Related Files

Gentoo Linux Security Advisory 202208-30
Posted Aug 15, 2022
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202208-30 - Multiple vulnerabilities have been discovered in Binutils, the worst of which could result in denial of service. Versions less than 2.38 are affected.

tags | advisory, denial of service, vulnerability
systems | linux, gentoo
advisories | CVE-2021-20197, CVE-2021-20284, CVE-2021-20294, CVE-2021-3487, CVE-2021-3530, CVE-2021-3549, CVE-2021-45078
SHA-256 | 3492b7e37b66d4f9324cc649d3ddb8d5d72c71a1f62f4a5b2a7912b8a19002b3
Red Hat Security Advisory 2021-4364-03
Posted Nov 10, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4364-03 - The binutils packages provide a collection of binary utilities for the manipulation of object code in various object file formats. It includes the ar, as, gprof, ld, nm, objcopy, objdump, ranlib, readelf, size, strings, strip, and addr2line utilities. Issues addressed include a buffer overflow vulnerability.

tags | advisory, overflow
systems | linux, redhat
advisories | CVE-2020-35448, CVE-2021-20197, CVE-2021-20284, CVE-2021-3487
SHA-256 | 9e8ecefe9e258408b2356c55e4062b3f368abfcefea5d6fd573bc4a272fba168
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