{"containers": {"cna": {"affected": [{"product": "Apache Roller", "vendor": "Apache Software Foundation", "versions": [{"lessThan": "6.0.2", "status": "affected", "version": "Apache Roller", "versionType": "custom"}]}], "credits": [{"lang": "en", "value": "Apache Roller would like to thank Ed Ra (https://github.com/edvraa) for reporting this."}], "descriptions": [{"lang": "en", "value": "User controlled `request.getHeader(\"Referer\")`, `request.getRequestURL()` and `request.getQueryString()` are used to build and run a regex expression. The attacker doesn't have to use a browser and may send a specially crafted Referer header programmatically. Since the attacker controls the string and the regex pattern he may cause a ReDoS by regex catastrophic backtracking on the server side. 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If you are not able to upgrade then you can \"work around\" the problem.\n\nIf Banned-Words Referrer processing is enabled and you are concerned about this type of attack then disable it.\n\nIn the Roller properties, set this property site.bannedwordslist.enable.referrers=false"}], "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security@apache.org", "ID": "CVE-2021-33580", "STATE": "PUBLIC", "TITLE": "regex injection leading to DoS"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Apache Roller", "version": {"version_data": [{"version_affected": "<", "version_name": "Apache Roller", "version_value": "6.0.2"}]}}]}, "vendor_name": "Apache Software Foundation"}]}}, "credit": [{"lang": "eng", "value": "Apache Roller would like to thank Ed Ra (https://github.com/edvraa) for reporting this."}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "User controlled `request.getHeader(\"Referer\")`, `request.getRequestURL()` and `request.getQueryString()` are used to build and run a regex expression. 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