| Name | CVE-2016-2781 |
| Description | chroot in GNU coreutils, when used with --userspec, allows local users to escape to the parent session via a crafted TIOCSTI ioctl call, which pushes characters to the terminal's input buffer. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 816320 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| coreutils (PTS) | jessie | 8.23-4 | vulnerable |
| stretch | 8.26-3 | vulnerable |
| buster | 8.30-3 | vulnerable |
| bullseye | 8.32-4 | vulnerable |
| bookworm | 9.1-1 | vulnerable |
| sid, trixie | 9.5-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| coreutils | source | (unstable) | (unfixed) | low | | 816320 |
Notes
[bookworm] - coreutils <ignored> (Minor issue)
[bullseye] - coreutils <ignored> (Minor issue)
[buster] - coreutils <ignored> (Minor issue)
[stretch] - coreutils <ignored> (Minor issue)
[jessie] - coreutils <ignored> (Minor issue)
[wheezy] - coreutils <ignored> (Minor issue)
Restricting ioctl on the kernel side seems the better approach, but rejected by Linux upstream
Fixing this issue via setsid() would introduce regressions:
https://www.kernel.org/pub/linux/utils/util-linux/v2.28/v2.28-ReleaseNotes