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{"acknowledgement": "Red Hat would like to thank Daniel Stenberg and Harry Sintonen for reporting this issue.", "affected_release": [{"advisory": "RHSA-2023:3106", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "curl-0:7.61.1-30.el8_8.2", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2023-05-16T00:00:00Z"}, {"advisory": "RHSA-2024:0428", "cpe": "cpe:/o:redhat:rhel_eus:8.6", "package": "curl-0:7.61.1-22.el8_6.12", "product_name": "Red Hat Enterprise Linux 8.6 Extended Update Support", "release_date": "2024-01-25T00:00:00Z"}, {"advisory": "RHSA-2023:2650", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "curl-0:7.76.1-23.el9_2.1", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-05-09T00:00:00Z"}, {"advisory": "RHSA-2023:2650", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "curl-0:7.76.1-23.el9_2.1", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-05-09T00:00:00Z"}], "bugzilla": {"description": "curl: FTP too eager connection reuse", "id": "2179073", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2179073"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "status": "verified"}, "cwe": "CWE-305", "details": ["An authentication bypass vulnerability exists in libcurl <8.0.0 in the FTP connection reuse feature that can result in wrong credentials being used during subsequent transfers. Previously created connections are kept in a connection pool for reuse if they match the current setup. However, certain FTP settings such as CURLOPT_FTP_ACCOUNT, CURLOPT_FTP_ALTERNATIVE_TO_USER, CURLOPT_FTP_SSL_CCC, and CURLOPT_USE_SSL were not included in the configuration match checks, causing them to match too easily. This could lead to libcurl using the wrong credentials when performing a transfer, potentially allowing unauthorized access to sensitive information.", "A flaw was found in the Curl package. Libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup. However, several FTP settings were left out from the configuration match checks, making them match too easily. The problematic settings are `CURLOPT_FTP_ACCOUNT`, `CURLOPT_FTP_ALTERNATIVE_TO_USER`, `CURLOPT_FTP_SSL_CCC` and `CURLOPT_USE_SSL` level."], "name": "CVE-2023-27535", "package_state": [{"cpe": "cpe:/a:redhat:rhel_dotnet:3.1", "fix_state": "Out of support scope", "package_name": "rh-dotnet31-curl", "product_name": ".NET Core 3.1 on Red Hat Enterprise Linux"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Will not fix", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:jboss_core_services:1", "fix_state": "Affected", "package_name": "curl", "product_name": "Red Hat JBoss Core Services"}], "public_date": "2023-03-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-27535\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-27535\nhttps://curl.se/docs/CVE-2023-27535.html"], "threat_severity": "Moderate"}