ADVISORIES
GEM
SEVERITY
CVSS v3.x: 9.8 (Critical)
PATCHED VERSIONS
- ~> 2.5.4
- >= 3.0.0
DESCRIPTION
A flaw in how restforce constructs URL's may allow an attacker to inject additional parameters into Salesforce API requests.
Impact
This flaw is only exploitable in applications that pass user input directly to restforce's select, find, describe, update, upsert, and destroy methods. Vulnerable code might look like:
client.select('SomeSalesForceObject', params[:some-id],
...)
In such an application, attackers could pass 0016000000MRatd/describe
as a request parameter, causing the server to make a request to a different
endpoint than the server is designed to handle. Since the Salesforce REST
API supports overriding HTTP methods via a request parameter, an attacker
could also cause the client's select() method to modify data, by passing
0016000000MRatd/?_HttpMethod=PATCH&other-query-params=....
Workarounds
If possible, applications should track salesforce IDs internally, rather than passing user-supplied IDs to salesforce. Such practice mitigates this vulnerability, and in general is desirable for ensuring strong access control.