CVE-2018-12029

A race condition in the nginx module in Phusion Passenger 3.x through 5.x before 5.3.2 allows local escalation of privileges when a non-standard passengerinstanceregistry_dir with insufficiently strict permissions is configured. Replacing a file with a symlink after the file was created, but before it was chowned, leads to the target of the link being chowned via the path. Targeting sensitive files such as root's crontab file allows privilege escalation.

References

Affected packages

Git / github.com/phusion/passenger

Affected ranges

Type

GIT

Repo

https://github.com/phusion/passenger

Events

Introduced

2f225ddbc2161a1766c9cb326e5a661ae3848bd6

Fixed

5e4d60575fadfd68913bd229990cb9f3feb393a9

Database specific

{
    "versions": [
        {
            "introduced": "3.0.0"
        },
        {
            "fixed": "5.3.2"
        }
    ]
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-12029.json"

unresolved_ranges

[
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "8.0"
            }
        ]
    }
]