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The sort_by and sort_attr parameters to any controller that uses scoped_search searching are not properly sanitized and thus can be exploited to perform sql injection.

On the current release (2.4) most any api index call is vulnerable such as:

/katello/api/v2/products
/katello/api/v2/systems
/katello/api/v2/repositories

On older releases (2.3) only the errata api is affected:

/katello/api/v2/errata

An example showing the injection is:

 curl -k -u admin:changeme -X GET https://`hostname`/katello/api/v2/errata?sort_by=id\&sort_order=ASC\'

{"displayMessage":"PGError: ERROR:  unterminated quoted string at or near \"', 

I was not able to cause an update via this exploit, as it appeared that active record was handling part of the exploit (although i may have just not been talented enough).  The reporter was able to retrieve additional information from the database as a result though.

Created from redmine issue http://projects.theforeman.org/issues/14381

Upstream bug assigned to jsherril

VERIFIED.
Sat 6.2 GA 18.1
tfm-rubygem-katello-3.0.0.54-1.el7sat.noarch

$ curl -k -u admin:changeme -X GET https://localhost/katello/api/v2/errata?sort_by=\'id\&sort_order=ASC\' 2>/dev/null | json_reformat
{
    "total": 0,
    "subtotal": 0,
    "page": 1,
    "per_page": 20,
    "error": null,
    "search": null,
    "sort": {
        "by": "'id",
        "order": "ASC'"
    },
    "results": [

    ]
}

Apostrophes are properly escaped

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2016:1501