CRLF injection in Dropbear - CVE-2016-3116

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Main Vulnerability Database Vulnerabilities #VU33987

CRLF injection in Dropbear - CVE-2016-3116

Published: August 5, 2020 / Updated: August 5, 2020


Vulnerability identifier: #VU33987
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2016-3116
CWE-ID: CWE-93
Exploitation vector: Remote access
Exploit availability: Public exploit is available

Vulnerability details

The vulnerability allows a remote user to bypass implemented security restrictions.

The vulnerability exists due to improper input validation when processing CRLF characters. A remote authenticated user bypass intended shell-command restrictions via crafted X11 forwarding data.


Affected software

Dropbear
Gentoo Linux
Fedora
dropbear (Alpine package)
dropbear

How to mitigate CVE-2016-3116

Install updates from vendor's website.

Dropbear - update to 2016.72
dropbear (Alpine package) - update to 2016.72-r0
dropbear - addressed in versions 2016.72-1.el6, 2016.72-1.el7, 2016.72-1.fc22, 2016.72-1.fc23, 2016.72-1.fc24, 2016.74-1.el6, 2016.74-1.el7, 2016.74-1.fc23

Links to Public Exploits and PoC-codes

External References

Related Security Bulletins