CVE-2021-39197

better_errors is an open source replacement for the standard Rails error page with more information rich error pages. It is also usable outside of Rails in any Rack app as Rack middleware. better_errors prior to 2.8.0 did not implement CSRF protection for its internal requests. It also did not enforce the correct "Content-Type" header for these requests, which allowed a cross-origin "simple request" to be made without CORS protection. These together left an application with better_errors enabled open to cross-origin attacks. As a developer tool, better_errors documentation strongly recommends addition only to the `development` bundle group, so this vulnerability should only affect development environments. Please ensure that your project limits better_errors to the `development` group (or the non-Rails equivalent). Starting with release 2.8.x, CSRF protection is enforced. It is recommended that you upgrade to the latest release, or minimally to "~> 2.8.3". There are no known workarounds to mitigate the risk of using older releases of better_errors.
Configurations

Configuration 1 (hide)

cpe:2.3:a:better_errors_project:better_errors:*:*:*:*:*:ruby:*:*

History

21 Nov 2024, 06:18

Type Values Removed Values Added
CVSS v2 : 6.8
v3 : 8.8
v2 : 6.8
v3 : 6.3
References () https://github.com/BetterErrors/better_errors/commit/8e8e796bfbde4aa088741823c8a3fc6df2089bb0 - Patch, Third Party Advisory () https://github.com/BetterErrors/better_errors/commit/8e8e796bfbde4aa088741823c8a3fc6df2089bb0 - Patch, Third Party Advisory
References () https://github.com/BetterErrors/better_errors/discussions/507 - Third Party Advisory () https://github.com/BetterErrors/better_errors/discussions/507 - Third Party Advisory
References () https://github.com/BetterErrors/better_errors/pull/474 - Patch, Third Party Advisory () https://github.com/BetterErrors/better_errors/pull/474 - Patch, Third Party Advisory
References () https://github.com/BetterErrors/better_errors/security/advisories/GHSA-w3j4-76qw-wwjm - Third Party Advisory () https://github.com/BetterErrors/better_errors/security/advisories/GHSA-w3j4-76qw-wwjm - Third Party Advisory

14 Sep 2021, 18:34

Type Values Removed Values Added
CVSS v2 : unknown
v3 : 6.3
v2 : 6.8
v3 : 8.8
CPE cpe:2.3:a:better_errors_project:better_errors:*:*:*:*:*:ruby:*:*
References (MISC) https://github.com/BetterErrors/better_errors/pull/474 - (MISC) https://github.com/BetterErrors/better_errors/pull/474 - Patch, Third Party Advisory
References (MISC) https://github.com/BetterErrors/better_errors/discussions/507 - (MISC) https://github.com/BetterErrors/better_errors/discussions/507 - Third Party Advisory
References (CONFIRM) https://github.com/BetterErrors/better_errors/security/advisories/GHSA-w3j4-76qw-wwjm - (CONFIRM) https://github.com/BetterErrors/better_errors/security/advisories/GHSA-w3j4-76qw-wwjm - Third Party Advisory
References (MISC) https://github.com/BetterErrors/better_errors/commit/8e8e796bfbde4aa088741823c8a3fc6df2089bb0 - (MISC) https://github.com/BetterErrors/better_errors/commit/8e8e796bfbde4aa088741823c8a3fc6df2089bb0 - Patch, Third Party Advisory

07 Sep 2021, 18:53

Type Values Removed Values Added
New CVE

Information

Published : 2021-09-07 18:15

Updated : 2024-11-21 06:18


NVD link : CVE-2021-39197

Mitre link : CVE-2021-39197

CVE.ORG link : CVE-2021-39197


JSON object : View

Products Affected

better_errors_project

  • better_errors
CWE
CWE-352

Cross-Site Request Forgery (CSRF)