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When using that memory, libcurl might even call a function pointer in the object, making it possible for a remote code execution if the server could somehow manage to get crafted memory content into the correct place in memory."}, {"lang": "es", "value": "curl versiones 7.75.0 hasta 7.76.1 sufre de una vulnerabilidad de uso de la memoria previamente liberada que resulta en el uso de memoria ya liberada cuando un ticket de sesi\u00f3n TLS 1.3 llega a trav\u00e9s de una conexi\u00f3n. Un servidor malicioso puede usar esto en raras circunstancias desafortunadas para alcanzar potencialmente la ejecuci\u00f3n de c\u00f3digo remota en el cliente. Cuando libcurl en tiempo de ejecuci\u00f3n configura el soporte para tickets de sesi\u00f3n TLS 1.3 en una conexi\u00f3n usando OpenSSL, almacena punteros al objeto de transferencia en memoria para su posterior recuperaci\u00f3n cuando llega un ticket de sesi\u00f3n. Si la conexi\u00f3n es usada por m\u00faltiples transferencias (como en el caso de una conexi\u00f3n HTTP/1.1 reutilizada o una conexi\u00f3n HTTP/2 multiplexada) ese primer objeto de transferencia podr\u00eda ser liberado antes de que se establezca la nueva sesi\u00f3n en esa conexi\u00f3n y entonces la funci\u00f3n acceder\u00e1 a un b\u00fafer de memoria que podr\u00eda ser liberado. 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"product_name": "JBoss Core Services for RHEL 8", "release_date": "2021-06-17T00:00:00Z"}, {"advisory": "RHSA-2021:2472", "cpe": "cpe:/a:redhat:jboss_core_services:1::el8", "package": "jbcs-httpd24-nghttp2-0:1.39.2-37.el8jbcs", "product_name": "JBoss Core Services for RHEL 8", "release_date": "2021-06-17T00:00:00Z"}, {"advisory": "RHSA-2021:2472", "cpe": "cpe:/a:redhat:jboss_core_services:1::el8", "package": "jbcs-httpd24-openssl-1:1.1.1g-6.el8jbcs", "product_name": "JBoss Core Services for RHEL 8", "release_date": "2021-06-17T00:00:00Z"}, {"advisory": "RHSA-2021:2472", "cpe": "cpe:/a:redhat:jboss_core_services:1::el8", "package": "jbcs-httpd24-openssl-chil-0:1.0.0-5.el8jbcs", "product_name": "JBoss Core Services for RHEL 8", "release_date": "2021-06-17T00:00:00Z"}, {"advisory": "RHSA-2021:2472", "cpe": "cpe:/a:redhat:jboss_core_services:1::el8", "package": "jbcs-httpd24-openssl-pkcs11-0:0.4.10-20.el8jbcs", "product_name": "JBoss Core Services for RHEL 8", "release_date": "2021-06-17T00:00:00Z"}, {"advisory": "RHSA-2021:2472", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-0:1-18.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2021-06-17T00:00:00Z"}, {"advisory": "RHSA-2021:2472", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-apr-0:1.6.3-105.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2021-06-17T00:00:00Z"}, {"advisory": "RHSA-2021:2472", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-apr-util-0:1.6.1-82.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2021-06-17T00:00:00Z"}, {"advisory": "RHSA-2021:2472", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-curl-0:7.77.0-2.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2021-06-17T00:00:00Z"}, {"advisory": "RHSA-2021:2472", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-httpd-0:2.4.37-74.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2021-06-17T00:00:00Z"}, {"advisory": "RHSA-2021:2472", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-jansson-0:2.11-55.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2021-06-17T00:00:00Z"}, {"advisory": "RHSA-2021:2472", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-mod_cluster-native-0:1.3.16-5.Final_redhat_2.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2021-06-17T00:00:00Z"}, {"advisory": "RHSA-2021:2472", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-mod_http2-0:1.15.7-17.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2021-06-17T00:00:00Z"}, {"advisory": "RHSA-2021:2472", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-mod_jk-0:1.2.48-16.redhat_1.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2021-06-17T00:00:00Z"}, {"advisory": "RHSA-2021:2472", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-mod_md-1:2.0.8-36.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2021-06-17T00:00:00Z"}, {"advisory": "RHSA-2021:2472", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-mod_security-0:2.9.2-63.GA.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2021-06-17T00:00:00Z"}], "bugzilla": {"description": "curl: Use-after-free in TLS session handling when using OpenSSL TLS backend", "id": "1963146", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1963146"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["curl 7.75.0 through 7.76.1 suffers from a use-after-free vulnerability resulting in already freed memory being used when a TLS 1.3 session ticket arrives over a connection. A malicious server can use this in rare unfortunate circumstances to potentially reach remote code execution in the client. When libcurl at run-time sets up support for TLS 1.3 session tickets on a connection using OpenSSL, it stores pointers to the transfer in-memory object for later retrieval when a session ticket arrives. If the connection is used by multiple transfers (like with a reused HTTP/1.1 connection or multiplexed HTTP/2 connection) that first transfer object might be freed before the new session is established on that connection and then the function will access a memory buffer that might be freed. When using that memory, libcurl might even call a function pointer in the object, making it possible for a remote code execution if the server could somehow manage to get crafted memory content into the correct place in memory.", "A use-after-free flaw was found in the way curl handled TLS session data. The curl versions using the OpenSSL library as their TLS backend could use freed memory after TLS session renegotiation was performed by the OpenSSL library. A malicious TLS server could use this flaw to crash or, possibly, execute arbitrary code with the privileges of a client application using the curl library."], "name": "CVE-2021-22901", "package_state": [{"cpe": "cpe:/a:redhat:rhel_dotnet:2.1", "fix_state": "Not affected", "package_name": "rh-dotnet21-curl", "product_name": ".NET Core 2.1 on Red Hat Enterprise Linux"}, {"cpe": "cpe:/a:redhat:rhel_dotnet:3.1", "fix_state": "Not affected", "package_name": "rh-dotnet31-curl", "product_name": ".NET Core 3.1 on Red Hat Enterprise Linux"}, {"cpe": "cpe:/a:redhat:ceph_storage:2", "fix_state": "Not affected", "package_name": "curl", "product_name": "Red Hat Ceph Storage 2"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:rhel_software_collections:3", "fix_state": "Not affected", "package_name": "httpd24-curl", "product_name": "Red Hat Software Collections"}], "public_date": "2021-05-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-22901\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-22901\nhttps://curl.se/docs/CVE-2021-22901.html"], "threat_severity": "Important"}

{}