CVE-2020-26254 omniauth-apple allows attacker to fake their email address during authentication
Attackers can spoof email addresses during Apple Sign-In, potentially leading to account takeover in applications relying on email for identification.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-26254?
CVE-2020-26254 is a high-severity authentication bypass vulnerability in nhosoya omniauth-apple, published on 8 Dec 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
omniauth-apple is the OmniAuth strategy for "Sign In with Apple" (RubyGem omniauth-apple). In omniauth-apple before version 1.0.1 attackers can fake their email address during authentication. This vulnerability impacts applications using the omniauth-apple strategy of OmniAuth and using the info.email field of OmniAuth's 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. 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. Applications using affected versions of omniauth-apple are advised to upgrade to omniauth-apple version 1.0.1 or later.
Weakness: CWE-290
Which versions are affected by CVE-2020-26254?
2 open source packages ship an affected version, including omniauth-apple. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
omniauth-apple RubyGems | All versions | 1.0.1 |
omniauth-apple RubyGems | All versions | 1.0.1 |
Products include Omniauth-Apple Project Omniauth-Apple.
How do I fix CVE-2020-26254?
Upgrade omniauth-apple to 1.0.1 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2020-26254 being exploited?
There is no known exploitation of CVE-2020-26254 in the wild and no public exploit code.
Sources
Also known as GHSA-49r3-2549-3633.