Description
CRLF injection vulnerability in Dropbear SSH before 2016.72 allows remote authenticated users to bypass intended shell-command restrictions via crafted X11 forwarding data.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | dropbear | 2016.72-1 | — |
| Debian 13 | dropbear | 2016.72-1 | — |
| Debian 12 | dropbear | 2016.72-1 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- DropBearSSHD 2015.71 - Command Injection EDB-40119 · remote · Mar 3, 2016
GitHub 1 repository
-
mxypoo/CVE-2016-3116-DropbearSSH ★ 2 · Feb 22, 2022
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- https://github.com/tintinweb/pub/tree/master/pocs/cve-2016-3115
- https://matt.ucc.asn.au/dropbear/CHANGES
- FEDORA-2016-40a657cee1 vendor-advisory
- http://packetstormsecurity.com/files/136251/Dropbear-SSHD-xauth-Command-Injection-Bypass.html
- FEDORA-2016-332491de28 vendor-advisory
- 20160314 CVE-2016-3116 - Dropbear SSH xauth injection mailing-list
- FEDORA-2016-bc45faa824 vendor-advisory
- openSUSE-SU-2016:0882 vendor-advisory
- GLSA-201607-08 vendor-advisory
- openSUSE-SU-2016:0874 vendor-advisory