CVE-2019-5431 Auth bypass in Twitter Kit for iOS
Attackers can forge Twitter login callbacks to associate arbitrary Twitter accounts with third-party services due to missing response verification.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-5431?
CVE-2019-5431 is a medium-severity authentication bypass vulnerability in Twitter Kit for iOS, published on 6 May 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
This vulnerability was caused by an incomplete fix to CVE-2017-0911. Twitter Kit for iOS versions 3.0 to 3.4.0 is vulnerable to a callback verification flaw in the "Login with Twitter" component allowing an attacker to provide alternate credentials. In the final step of "Login with Twitter" authentication information is passed back to the application using the registered custom URL scheme (typically twitterkit-<consumer-key>) on iOS. Because the callback handler did not verify the authenticity of the response, this step is vulnerable to forgery, potentially allowing attacker to associate a Twitter account with a third-party service.
Which versions are affected by CVE-2019-5431?
It affects 1 product.
Products include Twitter Twitter Kit.
How do I fix CVE-2019-5431?
No fix has been published for CVE-2019-5431 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2019-5431 being exploited?
There is no known exploitation of CVE-2019-5431 in the wild and no public exploit code.
Other vulnerabilities in Twitter Kit for iOS
Sources
Also known as GHSA-4588-cpvg-rgr5.