#VU66857 UNIX symbolic link following in Docker - CVE-2015-3627
Published: August 30, 2022
Vulnerability identifier: #VU66857
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2015-3627
CWE-ID: CWE-61
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Docker
Docker
Software vendor:
Docker Inc.
Docker Inc.
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a symlink following issue, because Docker opens the file-descriptor passed to the pid-1 process before performing the chroot. A local user can create a specially crafted symbolic link to a critical file on the system and overwrite it with privileges of the application.
Successful exploitation of this vulnerability may result in privilege escalation.
Remediation
Install updates from vendor's website.
External links
- http://lists.opensuse.org/opensuse-updates/2015-05/msg00023.html
- http://packetstormsecurity.com/files/131835/Docker-Privilege-Escalation-Information-Disclosure.html
- http://seclists.org/fulldisclosure/2015/May/28
- https://groups.google.com/forum/#!searchin/docker-user/1.6.1/docker-user/47GZrihtr-4/nwgeOOFLexIJ