CVE-2020-5217 Detail
Current Description
In Secure Headers (RubyGem secure_headers), a directive injection vulnerability is present in versions before 3.8.0, 5.1.0, and 6.2.0. If user-supplied input was passed into append/override_content_security_policy_directives, a semicolon could be injected leading to directive injection. This could be used to e.g. override a script-src directive. Duplicate directives are ignored and the first one wins. The directives in secure_headers are sorted alphabetically so they pretty much all come before script-src. A previously undefined directive would receive a value even if SecureHeaders::OPT_OUT was supplied. The fixed versions will silently convert the semicolons to spaces and emit a deprecation warning when this happens. This will result in innocuous browser console messages if being exploited/accidentally used. In future releases, we will raise application errors resulting in 500s. Depending on what major version you are using, the fixed versions are 6.2.0, 5.1.0, 3.8.0.
Source:
MITRE
View Analysis Description
Analysis Description
In Secure Headers (RubyGem secure_headers), a directive injection vulnerability is present in versions before 3.8.0, 5.1.0, and 6.2.0. If user-supplied input was passed into append/override_content_security_policy_directives, a semicolon could be injected leading to directive injection. This could be used to e.g. override a script-src directive. Duplicate directives are ignored and the first one wins. The directives in secure_headers are sorted alphabetically so they pretty much all come before script-src. A previously undefined directive would receive a value even if SecureHeaders::OPT_OUT was supplied. The fixed versions will silently convert the semicolons to spaces and emit a deprecation warning when this happens. This will result in innocuous browser console messages if being exploited/accidentally used. In future releases, we will raise application errors resulting in 500s. Depending on what major version you are using, the fixed versions are 6.2.0, 5.1.0, 3.8.0.
Source:
MITRE
Severity
CVSS 3.x Severity and Metrics:
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CNA: security-advisories@github.com
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0 Severity and Metrics:
Vector: (AV:N/AC:M/Au:N/C:N/I:P/A:N)
References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID |
CWE Name |
Source |
| CWE-74 |
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') |
NIST
|
| CWE-95 |
Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection') |
security-advisories@github.com
|
Known Affected Software Configurations
Switch to CPE 2.2
Configuration 1 ( hide ) cpe:2.3:a:twitter:secure_headers:*:*:*:*:*:ruby:*:*
Show Matching CPE(s)
|
Up to (excluding)
3.8.0 | cpe:2.3:a:twitter:secure_headers:*:*:*:*:*:ruby:*:*
Show Matching CPE(s)
|
From (including)
5.0.0 | Up to (excluding)
5.1.0 | cpe:2.3:a:twitter:secure_headers:*:*:*:*:*:ruby:*:*
Show Matching CPE(s)
|
From (including)
6.0.0 | Up to (excluding)
6.2.0 |
Change History
1 change record found
- show changes
Initial Analysis -
1/30/2020 10:21:09 AM
| Action |
Type |
Old Value |
New Value |
| Added |
CPE Configuration |
|
OR
*cpe:2.3:a:twitter:secure_headers:*:*:*:*:*:ruby:*:* versions up to (excluding) 3.8.0
*cpe:2.3:a:twitter:secure_headers:*:*:*:*:*:ruby:*:* versions from (including) 5.0.0 up to (excluding) 5.1.0
*cpe:2.3:a:twitter:secure_headers:*:*:*:*:*:ruby:*:* versions from (including) 6.0.0 up to (excluding) 6.2.0 |
| Added |
CVSS V2 |
|
NIST (AV:N/AC:M/Au:N/C:N/I:P/A:N) |
| Added |
CVSS V2 Metadata |
|
Victim must voluntarily interact with attack mechanism |
| Added |
CVSS V3.1 |
|
NIST AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N |
| Added |
CWE |
|
NIST CWE-74 |
| Changed |
Reference Type |
https://github.com/twitter/secure_headers/commit/936a160e3e9659737a9f9eafce13eea36b5c9fa3 No Types Assigned |
https://github.com/twitter/secure_headers/commit/936a160e3e9659737a9f9eafce13eea36b5c9fa3 Patch |
| Changed |
Reference Type |
https://github.com/twitter/secure_headers/issues/418 No Types Assigned |
https://github.com/twitter/secure_headers/issues/418 Exploit, Third Party Advisory |
| Changed |
Reference Type |
https://github.com/twitter/secure_headers/pull/421 No Types Assigned |
https://github.com/twitter/secure_headers/pull/421 Third Party Advisory |
| Changed |
Reference Type |
https://github.com/twitter/secure_headers/security/advisories/GHSA-xq52-rv6w-397c No Types Assigned |
https://github.com/twitter/secure_headers/security/advisories/GHSA-xq52-rv6w-397c Mitigation, Third Party Advisory |
Quick Info
CVE Dictionary Entry:
CVE-2020-5217
NVD Published Date:
01/22/2020
NVD Last Modified:
01/30/2020
|