SB2015051807 - Insecure link following in Docker
Published: May 18, 2015 Updated: August 30, 2022
Security Bulletin ID
SB2015051807
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) UNIX symbolic link following (CVE-ID: CVE-2015-3627)
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 update from vendor's website.
References
- 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