Auth bypass in Twitter Kit
CVE-2017-0911
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.005 (40.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Twitter Kit
- Twitter Kit For iOS — versions Versions 3.0 to 3.2.1
Weakness classification (CWE)
References
- hackerone.com/reports/290229 (Permissions Required, Third Party Advisory)
- blog.twitter.com/developer/en_us/topics/tips/2018/vulnerability-in-twitter-kit-… (Third Party Advisory)
- github.com/twitter/twitter-kit-ios/blob/b6eb49d149b056d826cbc4b53eaeb39a3ebd591… (Patch, Third Party Advisory)
- github.com/twitter/twitter-kit-ios/wiki/Changelog (Third Party Advisory, Release Notes)
- github.com/twitter/twitter-kit-ios/blob/b6eb49d149b056d826cbc4b53eaeb39a3ebd591… (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-0911?
- CVE-2017-0911 is a medium-severity vulnerability in Twitter Kit, classified under CWE-360. CVSS score: 5.4/10. Published 2018-02-09.
- How severe is CVE-2017-0911?
- Medium severity. CVSS v3 base score is 5.4 out of 10.