Date: Wed, 01 Apr 2020 07:54:12 -0500 From: Daniel Ruggeri <druggeri@...che.org> To: oss-security@...ts.openwall.com Subject: CVE-2020-1927: mod_rewrite configurations vulnerable to open redirect CVE-2020-1927: mod_rewrite configurations vulnerable to open redirect Severity: Low Vendor: The Apache Software Foundation Versions Affected: httpd 2.4.0 to 2.4.39 Description: Apache HTTP Server 2.4.0 to 2.4.41 Redirects configured with mod_rewrite that were intended to be self-referential might be fooled by encoded newlines and redirect instead to an an unexpected URL within the request URL. Note: This is the same defect as CVE-2019-10098. The fix for CVE-2019-10098 was ineffective. Mitigation: Anchor captures used as back-references, prefix self-referential redirects with / or scheme, host, and port. Credit: The issue was discovered by Fabrice Perez References: https://httpd.apache.org/security/vulnerabilities_24.html
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