CVE-2020-26254 – omniauth-apple

Package

Manager: gem
Name: omniauth-apple
Vulnerable Version: >=0 <1.0.1

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N

EPSS: 0.00262 pctl0.49367

Details

omniauth-apple allows attacker to fake their email address during authentication ### Impact This vulnerability impacts applications using the [omniauth-apple](https://github.com/nhosoya/omniauth-apple) strategy of OmniAuth and using the `info.email` field of OmniAuth's [Auth Hash Schema](https://github.com/omniauth/omniauth/wiki/Auth-Hash-Schema) for any kind of identification. The value of this field may be set to any value of the attacker's choice including email addresses of other users. For example, an application using omniauth-apple with the following code will be impacted: ```ruby def omniauth_callback auth_hash = request.env['omniauth.auth'] @authenticated_user = User.find_by(email: auth_hash.info.email) end ``` Applications not using `info.email` for identification but are instead using the `uid` field are not impacted in the same manner. Note, these applications may still be negatively affected if the value of `info.email` is being used for other purposes. ### Patches Applications using affected versions of omniauth-apple are advised to upgrade to omniauth-apple version 1.0.1 or later. ### Workarounds If unable to upgrade to a patched version, monkey patching `OmniAuth::Strategies::Apple#email` as follows is advised as a workaround: ```ruby module OmniAuth module Strategies class Apple def email id_info['email'] end end end end ```

Metadata

Created: 2020-12-08T14:18:19Z
Modified: 2023-05-16T16:06:03Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/12/GHSA-49r3-2549-3633/GHSA-49r3-2549-3633.json
CWE IDs: ["CWE-290"]
Alternative ID: GHSA-49r3-2549-3633
Finding: F032
Auto approve: 1