| Name | CVE-2017-5618 |
| Description | GNU screen before 4.5.1 allows local users to modify arbitrary files and consequently gain root privileges by leveraging improper checking of logfile permissions. |
| 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 | 852484 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| screen (PTS) | jessie, jessie (lts) | 4.2.1-3+deb8u2 | fixed |
| stretch (security), stretch (lts), stretch | 4.5.0-6+deb9u1 | fixed |
| buster (security), buster, buster (lts) | 4.6.2-3+deb10u1 | fixed |
| bullseye | 4.8.0-6 | fixed |
| bookworm | 4.9.0-4 | fixed |
| sid, trixie | 4.9.1-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| screen | source | wheezy | (not affected) | | | |
| screen | source | jessie | (not affected) | | | |
| screen | source | stretch | (not affected) | | | |
| screen | source | (unstable) | 4.5.0-3 | | | 852484 |
Notes
[stretch] - screen <not-affected> (Vulnerable code not present/never migrated to stretch)
[jessie] - screen <not-affected> (Vulnerable code not present)
[wheezy] - screen <not-affected> (Vulnerable code not present)
https://lists.gnu.org/archive/html/screen-devel/2017-01/msg00025.html
https://savannah.gnu.org/bugs/?50142
Introduced in (screen-v4): http://git.savannah.gnu.org/cgit/screen.git/commit/?h=screen-v4&id=5460f5d28c01a9a58e021eb1dffef2965e629d58
Introduced in (master): http://git.savannah.gnu.org/cgit/screen.git/commit/?id=c575c40c9bd7653470639da32e06faed0a9b2ec4
https://www.openwall.com/lists/oss-security/2017/01/24/10