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CVE-2017-0911

5.4 · MEDIUM

Twitter Kit for iOS versions 3.0 to 3.2.1 is vulnerable to a callback verification flaw in the "Login with Twitter" component allowing an attacker to provide alternate credentials.

Published Feb 9, 2018CWE-360EPSS 0.50%

Overview

CVE-2017-0911 is a medium-severity vulnerability. It was published on February 9, 2018 and has a CVSS 3.0 base score of 5.4 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 5.4, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Twitter Kit for iOS versions 3.0 to 3.2.1 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refblog.twitter.com/developer/en_us/topics/tips/2018/vulnerability-in-twitter-kit-for-ios.htmlGitHubgithub.com/twitter/twitter-kit-ios/blob/b6eb49d149b056d826cbc4b53eaeb39a3ebd591e/TwitterKit/TwitterKit/Social/Identity/TWTRMobileSSO.m#L71GitHubgithub.com/twitter/twitter-kit-ios/blob/b6eb49d149b056d826cbc4b53eaeb39a3ebd591e/TwitterKit/TwitterKit/TWTRTwitter.m#L411GitHubgithub.com/twitter/twitter-kit-ios/wiki/Changelog#322-november-28-2017Refhackerone.com/reports/290229Refblog.twitter.com/developer/en_us/topics/tips/2018/vulnerability-in-twitter-kit-for-ios.htmlGitHubgithub.com/twitter/twitter-kit-ios/blob/b6eb49d149b056d826cbc4b53eaeb39a3ebd591e/TwitterKit/TwitterKit/Social/Identity/TWTRMobileSSO.m#L71GitHubgithub.com/twitter/twitter-kit-ios/blob/b6eb49d149b056d826cbc4b53eaeb39a3ebd591e/TwitterKit/TwitterKit/TWTRTwitter.m#L411GitHubgithub.com/twitter/twitter-kit-ios/wiki/Changelog#322-november-28-2017Refhackerone.com/reports/290229

How CyberStrike helps

Frequently asked questions

What is CVE-2017-0911?

CVE-2017-0911 is a medium-severity vulnerability. It was published on February 9, 2018 and has a CVSS 3.0 base score of 5.4 (MEDIUM).

How severe is CVE-2017-0911?

This vulnerability has a CVSS 3.0 base score of 5.4, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2017-0911?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-0911?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-0911 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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