Vulnerability in Twitter Secure Headers
CVE-2020-5216
In Secure Headers (RubyGem secure_headers), a directive injection vulnerability is present in versions before 3.9.0, 5.2.0, and 6.3.0. If user-supplied input was passed into append/override_content_security_policy_directives, a newline could be injected leading to limited header injection. Upon seeing a newline in the header, rails will silently create a new Content-Security-Policy header with the remaining value of the original string. It will continue to create new headers for each newline. This has been fixed in 6.3.0, 5.2.0, and 3.9.0.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.011 (63.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
- Twitter Secure Headers — versions < 3.9.0, >= 5.0.0, < 5.2.0, >= 6.0.0, < 6.3.0
Weakness classification (CWE)
References
- github.com/twitter/secure_headers/security/advisories/GHSA-w978-rmpf-qmwg (Exploit, Third Party Advisory, Mitigation)
- github.com/twitter/secure_headers/commit/301695706f6a70517c2a90c6ef9b32178440a2… (Patch)
Frequently asked questions
- What is CVE-2020-5216?
- CVE-2020-5216 is a medium-severity vulnerability in Twitter Secure Headers, classified under HTTP Response Splitting. CVSS score: 4.4/10. Published 2020-01-23.
- How severe is CVE-2020-5216?
- Medium severity. CVSS v3 base score is 4.4 out of 10.