| Name | CVE-2021-20197 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| binutils (PTS) | jessie, jessie (lts) | 2.25-5+deb8u2 | vulnerable |
| stretch (lts), stretch | 2.28-5+deb9u1 | vulnerable | |
| buster, buster (lts) | 2.31.1-16+deb10u1 | vulnerable | |
| bullseye | 2.35.2-2 | vulnerable | |
| bookworm | 2.40-2 | fixed | |
| sid, trixie | 2.43.1-5 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| binutils | source | experimental | 2.35.50.20201209-1 | |||
| binutils | source | (unstable) | 2.37-3 | unimportant |
https://sourceware.org/bugzilla/show_bug.cgi?id=26945
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=014cc7f849e8209623fc99264814bce7b3b6faf2
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=1a1c3b4cc17687091cff5a368bd6f13742bcfdf8
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=365f5fb6d0f0da83817431a275e99e6f6babbe04
binutils not covered by security support