What is the CVSS score of CVE-2020-5216?

CVE-2020-5216 has a CVSS 3.1 base score of 5.8 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N. EPSS exploitation probability: 1.1%.

Is there a public PoC exploit available for CVE-2020-5216?

Yes, a public proof-of-concept exploit is available for CVE-2020-5216. Prioritise patching immediately. EPSS: 1.1%.

Is there a patch available for CVE-2020-5216?

Yes, a patch is available for CVE-2020-5216. Update the affected software to the latest version immediately.

Secure Headers CVE-2020-5216

MEDIUM

HTTP Response Splitting (CWE-113)

2020-01-23 security-advisories@github.com

Code Injection Secure Headers

5.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.8 MEDIUM

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

Low

Availability

None

Lifecycle Timeline

CVE Published

Jan 23, 2020 - 03:15 nvd

MEDIUM 5.8

DescriptionNVD

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.

AnalysisAI

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. Rated medium severity (CVSS 5.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-113. 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. Affected products include: Twitter Secure Headers. Version information: before 3.9.0.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.