{ "document": { "aggregate_severity": { "text": "Critical" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/oraclelinux7els/vex/2021/cve-2021-3711-els_os-oraclelinux7els.json" } ], "tracking": { "current_release_date": "2026-06-08T09:32:01Z", "generator": { "date": "2026-06-08T09:32:01Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2021-3711-ELS_OS-ORACLELINUX7ELS", "initial_release_date": "2021-08-24T15:15:00Z", "revision_history": [ { "date": "2021-08-24T15:15:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-06-05T20:45:15Z", "number": "2", "summary": "Official Publication" }, { "date": "2026-06-08T09:32:01Z", "number": "3", "summary": "Update document" } ], "status": "final", "version": "3" }, "title": "Security update on CVE-2021-3711" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Oracle Linux 7", "product": { "name": "Oracle Linux 7", "product_id": "Oracle-Linux-7", "product_identification_helper": { "cpe": "cpe:2.3:o:oracle:linux:7:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Oracle Linux" }, { "branches": [ { "category": "product_version", "name": "openssl11-1:1.1.1k-7.el7.x86_64", "product": { "name": "openssl11-1:1.1.1k-7.el7.x86_64", "product_id": "openssl11-1:1.1.1k-7.el7.x86_64", "product_identification_helper": { "purl": "pkg:rpm/oracle/openssl11@1.1.1k-7.el7?arch=x86_64&epoch=1" } } }, { "category": "product_version", "name": "openssl11-devel-1:1.1.1k-7.el7.x86_64", "product": { "name": "openssl11-devel-1:1.1.1k-7.el7.x86_64", "product_id": "openssl11-devel-1:1.1.1k-7.el7.x86_64", "product_identification_helper": { "purl": "pkg:rpm/oracle/openssl11-devel@1.1.1k-7.el7?arch=x86_64&epoch=1" } } }, { "category": "product_version", "name": "openssl11-static-1:1.1.1k-7.el7.x86_64", "product": { "name": "openssl11-static-1:1.1.1k-7.el7.x86_64", "product_id": "openssl11-static-1:1.1.1k-7.el7.x86_64", "product_identification_helper": { "purl": "pkg:rpm/oracle/openssl11-static@1.1.1k-7.el7?arch=x86_64&epoch=1" } } }, { "category": "product_version", "name": "openssl11-libs-1:1.1.1k-7.el7.x86_64", "product": { "name": "openssl11-libs-1:1.1.1k-7.el7.x86_64", "product_id": "openssl11-libs-1:1.1.1k-7.el7.x86_64", "product_identification_helper": { "purl": "pkg:rpm/oracle/openssl11-libs@1.1.1k-7.el7?arch=x86_64&epoch=1" } } } ], "category": "architecture", "name": "x86_64" } ], "category": "vendor", "name": "Oracle Corporation" }, { "branches": [ { "branches": [ { "category": "product_version", "name": "openssl11-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "product": { "name": "openssl11-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "product_id": "openssl11-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/openssl11@1.1.1k-7.el7.tuxcare.els1?arch=x86_64&epoch=1" } } }, { "category": "product_version", "name": "openssl11-devel-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "product": { "name": "openssl11-devel-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "product_id": "openssl11-devel-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/openssl11-devel@1.1.1k-7.el7.tuxcare.els1?arch=x86_64&epoch=1" } } }, { "category": "product_version", "name": "openssl11-static-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "product": { "name": "openssl11-static-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "product_id": "openssl11-static-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/openssl11-static@1.1.1k-7.el7.tuxcare.els1?arch=x86_64&epoch=1" } } }, { "category": "product_version", "name": "openssl11-libs-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "product": { "name": "openssl11-libs-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "product_id": "openssl11-libs-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/openssl11-libs@1.1.1k-7.el7.tuxcare.els1?arch=x86_64&epoch=1" } } } ], "category": "architecture", "name": "x86_64" } ], "category": "vendor", "name": "TuxCare" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "openssl11-1:1.1.1k-7.el7.tuxcare.els1.x86_64 as a component of Oracle Linux 7", "product_id": "Oracle-Linux-7:openssl11-1:1.1.1k-7.el7.tuxcare.els1.x86_64" }, "product_reference": "openssl11-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "relates_to_product_reference": "Oracle-Linux-7" }, { "category": "default_component_of", "full_product_name": { "name": "openssl11-devel-1:1.1.1k-7.el7.tuxcare.els1.x86_64 as a component of Oracle Linux 7", "product_id": "Oracle-Linux-7:openssl11-devel-1:1.1.1k-7.el7.tuxcare.els1.x86_64" }, "product_reference": "openssl11-devel-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "relates_to_product_reference": "Oracle-Linux-7" }, { "category": "default_component_of", "full_product_name": { "name": "openssl11-static-1:1.1.1k-7.el7.tuxcare.els1.x86_64 as a component of Oracle Linux 7", "product_id": "Oracle-Linux-7:openssl11-static-1:1.1.1k-7.el7.tuxcare.els1.x86_64" }, "product_reference": "openssl11-static-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "relates_to_product_reference": "Oracle-Linux-7" }, { "category": "default_component_of", "full_product_name": { "name": "openssl11-libs-1:1.1.1k-7.el7.tuxcare.els1.x86_64 as a component of Oracle Linux 7", "product_id": "Oracle-Linux-7:openssl11-libs-1:1.1.1k-7.el7.tuxcare.els1.x86_64" }, "product_reference": "openssl11-libs-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "relates_to_product_reference": "Oracle-Linux-7" }, { "category": "default_component_of", "full_product_name": { "name": "openssl11-1:1.1.1k-7.el7.x86_64 as a component of Oracle Linux 7", "product_id": "Oracle-Linux-7:openssl11-1:1.1.1k-7.el7.x86_64" }, "product_reference": "openssl11-1:1.1.1k-7.el7.x86_64", "relates_to_product_reference": "Oracle-Linux-7" }, { "category": "default_component_of", "full_product_name": { "name": "openssl11-devel-1:1.1.1k-7.el7.x86_64 as a component of Oracle Linux 7", "product_id": "Oracle-Linux-7:openssl11-devel-1:1.1.1k-7.el7.x86_64" }, "product_reference": "openssl11-devel-1:1.1.1k-7.el7.x86_64", "relates_to_product_reference": "Oracle-Linux-7" }, { "category": "default_component_of", "full_product_name": { "name": "openssl11-static-1:1.1.1k-7.el7.x86_64 as a component of Oracle Linux 7", "product_id": "Oracle-Linux-7:openssl11-static-1:1.1.1k-7.el7.x86_64" }, "product_reference": "openssl11-static-1:1.1.1k-7.el7.x86_64", "relates_to_product_reference": "Oracle-Linux-7" }, { "category": "default_component_of", "full_product_name": { "name": "openssl11-libs-1:1.1.1k-7.el7.x86_64 as a component of Oracle Linux 7", "product_id": "Oracle-Linux-7:openssl11-libs-1:1.1.1k-7.el7.x86_64" }, "product_reference": "openssl11-libs-1:1.1.1k-7.el7.x86_64", "relates_to_product_reference": "Oracle-Linux-7" } ] }, "vulnerabilities": [ { "cve": "CVE-2021-3711", "cwe": { "id": "CWE-120", "name": "Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')" }, "notes": [ { "category": "description", "text": "In order to decrypt SM2 encrypted data an application is expected to call the API function EVP_PKEY_decrypt(). Typically an application will call this function twice. The first time, on entry, the \"out\" parameter can be NULL and, on exit, the \"outlen\" parameter is populated with the buffer size required to hold the decrypted plaintext. The application can then allocate a sufficiently sized buffer and call EVP_PKEY_decrypt() again, but this time passing a non-NULL value for the \"out\" parameter. A bug in the implementation of the SM2 decryption code means that the calculation of the buffer size required to hold the plaintext returned by the first call to EVP_PKEY_decrypt() can be smaller than the actual size required by the second call. This can lead to a buffer overflow when EVP_PKEY_decrypt() is called by the application a second time with a buffer that is too small. A malicious attacker who is able present SM2 content for decryption to an application could cause attacker chosen data to overflow the buffer by up to a maximum of 62 bytes altering the contents of other data held after the buffer, possibly changing application behaviour or causing the application to crash. The location of the buffer is application dependent but is typically heap allocated. Fixed in OpenSSL 1.1.1l (Affected 1.1.1-1.1.1k).", "title": "Vulnerability description" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "Oracle-Linux-7:openssl11-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "Oracle-Linux-7:openssl11-devel-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "Oracle-Linux-7:openssl11-libs-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "Oracle-Linux-7:openssl11-static-1:1.1.1k-7.el7.tuxcare.els1.x86_64" ], "known_affected": [ "Oracle-Linux-7:openssl11-1:1.1.1k-7.el7.x86_64", "Oracle-Linux-7:openssl11-devel-1:1.1.1k-7.el7.x86_64", "Oracle-Linux-7:openssl11-libs-1:1.1.1k-7.el7.x86_64", "Oracle-Linux-7:openssl11-static-1:1.1.1k-7.el7.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2021-3711" }, { "category": "external", "summary": "http://www.openwall.com/lists/oss-security/2021/08/26/2", "url": "http://www.openwall.com/lists/oss-security/2021/08/26/2" }, { "category": "external", "summary": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf", "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf" }, { "category": "external", "summary": "https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=59f5e75f3bced8fc0e130d72a3f582cf7b480b46", "url": "https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=59f5e75f3bced8fc0e130d72a3f582cf7b480b46" }, { "category": "external", "summary": "https://lists.apache.org/thread.html/r18995de860f0e63635f3008fd2a6aca82394249476d21691e7c59c9e%40%3Cdev.tomcat.apache.org%3E", "url": "https://lists.apache.org/thread.html/r18995de860f0e63635f3008fd2a6aca82394249476d21691e7c59c9e%40%3Cdev.tomcat.apache.org%3E" }, { "category": "external", "summary": "https://lists.apache.org/thread.html/rad5d9f83f0d11fb3f8bb148d179b8a9ad7c6a17f18d70e5805a713d1%40%3Cdev.tomcat.apache.org%3E", "url": "https://lists.apache.org/thread.html/rad5d9f83f0d11fb3f8bb148d179b8a9ad7c6a17f18d70e5805a713d1%40%3Cdev.tomcat.apache.org%3E" }, { "category": "external", "summary": "https://security.gentoo.org/glsa/202209-02", "url": "https://security.gentoo.org/glsa/202209-02" }, { "category": "external", "summary": "https://security.gentoo.org/glsa/202210-02", "url": "https://security.gentoo.org/glsa/202210-02" }, { "category": "external", "summary": "https://security.netapp.com/advisory/ntap-20210827-0010/", "url": "https://security.netapp.com/advisory/ntap-20210827-0010/" }, { "category": "external", "summary": "https://security.netapp.com/advisory/ntap-20211022-0003/", "url": "https://security.netapp.com/advisory/ntap-20211022-0003/" }, { "category": "external", "summary": "https://security.netapp.com/advisory/ntap-20240621-0006/", "url": "https://security.netapp.com/advisory/ntap-20240621-0006/" }, { "category": "external", "summary": "https://www.debian.org/security/2021/dsa-4963", "url": "https://www.debian.org/security/2021/dsa-4963" }, { "category": "external", "summary": "https://www.openssl.org/news/secadv/20210824.txt", "url": "https://www.openssl.org/news/secadv/20210824.txt" }, { "category": "external", "summary": "https://www.oracle.com/security-alerts/cpuapr2022.html", "url": "https://www.oracle.com/security-alerts/cpuapr2022.html" }, { "category": "external", "summary": "https://www.oracle.com/security-alerts/cpujan2022.html", "url": "https://www.oracle.com/security-alerts/cpujan2022.html" }, { "category": "external", "summary": "https://www.oracle.com/security-alerts/cpuoct2021.html", "url": "https://www.oracle.com/security-alerts/cpuoct2021.html" }, { "category": "external", "summary": "https://www.tenable.com/security/tns-2021-16", "url": "https://www.tenable.com/security/tns-2021-16" }, { "category": "external", "summary": "https://www.tenable.com/security/tns-2022-02", "url": "https://www.tenable.com/security/tns-2022-02" } ], "release_date": "2021-08-24T15:15:00Z", "remediations": [ { "category": "vendor_fix", "date": "2026-06-05T17:55:29.202135Z", "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1780682108", "product_ids": [ "Oracle-Linux-7:openssl11-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "Oracle-Linux-7:openssl11-devel-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "Oracle-Linux-7:openssl11-libs-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "Oracle-Linux-7:openssl11-static-1:1.1.1k-7.el7.tuxcare.els1.x86_64" ], "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1780682108" }, { "category": "none_available", "date": "2021-08-24T15:15:00Z", "details": "Affected", "product_ids": [ "Oracle-Linux-7:openssl11-1:1.1.1k-7.el7.x86_64", "Oracle-Linux-7:openssl11-devel-1:1.1.1k-7.el7.x86_64", "Oracle-Linux-7:openssl11-libs-1:1.1.1k-7.el7.x86_64", "Oracle-Linux-7:openssl11-static-1:1.1.1k-7.el7.x86_64" ] } ], "scores": [ { "cvss_v2": { "accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0" }, "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "products": [ "Oracle-Linux-7:openssl11-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "Oracle-Linux-7:openssl11-1:1.1.1k-7.el7.x86_64", "Oracle-Linux-7:openssl11-devel-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "Oracle-Linux-7:openssl11-devel-1:1.1.1k-7.el7.x86_64", "Oracle-Linux-7:openssl11-libs-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "Oracle-Linux-7:openssl11-libs-1:1.1.1k-7.el7.x86_64", "Oracle-Linux-7:openssl11-static-1:1.1.1k-7.el7.tuxcare.els1.x86_64", "Oracle-Linux-7:openssl11-static-1:1.1.1k-7.el7.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Critical" } ] } ] }