CVE-2024-4741

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Applications that do not call this function are not<br>vulnerable. Our investigations indicate that this function is rarely used by<br>applications.<br><br>The SSL_free_buffers function is used to free the internal OpenSSL buffer used<br>when processing an incoming record from the network. The call is only expected<br>to succeed if the buffer is not currently in use. However, two scenarios have<br>been identified where the buffer is freed even when still in use.<br><br>The first scenario occurs where a record header has been received from the<br>network and processed by OpenSSL, but the full record body has not yet arrived.<br>In this case calling SSL_free_buffers will succeed even though a record has only<br>been partially processed and the buffer is still in use.<br><br>The second scenario occurs where a full record containing application data has<br>been received and processed by OpenSSL but the application has only read part of<br>this data. Again a call to SSL_free_buffers will succeed even though the buffer<br>is still in use.<br><br>While these scenarios could occur accidentally during normal operation a<br>malicious attacker could attempt to engineer a stituation where this occurs.<br>We are not aware of this issue being actively exploited.<br><br>The FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this issue."}], "value": "Issue summary: Calling the OpenSSL API function SSL_free_buffers may cause\nmemory to be accessed that was previously freed in some situations\n\nImpact summary: A use after free can have a range of potential consequences such\nas the corruption of valid data, crashes or execution of arbitrary code.\nHowever, only applications that directly call the SSL_free_buffers function are\naffected by this issue. Applications that do not call this function are not\nvulnerable. Our investigations indicate that this function is rarely used by\napplications.\n\nThe SSL_free_buffers function is used to free the internal OpenSSL buffer used\nwhen processing an incoming record from the network. The call is only expected\nto succeed if the buffer is not currently in use. However, two scenarios have\nbeen identified where the buffer is freed even when still in use.\n\nThe first scenario occurs where a record header has been received from the\nnetwork and processed by OpenSSL, but the full record body has not yet arrived.\nIn this case calling SSL_free_buffers will succeed even though a record has only\nbeen partially processed and the buffer is still in use.\n\nThe second scenario occurs where a full record containing application data has\nbeen received and processed by OpenSSL but the application has only read part of\nthis data. Again a call to SSL_free_buffers will succeed even though the buffer\nis still in use.\n\nWhile these scenarios could occur accidentally during normal operation a\nmalicious attacker could attempt to engineer a stituation where this occurs.\nWe are not aware of this issue being actively exploited.\n\nThe FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this issue."}], "metrics": [{"format": "other", "other": {"content": {"text": "Low"}, "type": "https://www.openssl.org/policies/secpolicy.html"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-416", "description": "CWE-416 Use After Free", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5", "shortName": "openssl", "dateUpdated": "2024-11-13T10:20:50.711Z"}, "references": [{"name": "OpenSSL Advisory", "tags": ["vendor-advisory"], "url": "https://www.openssl.org/news/secadv/20240528.txt"}, {"name": "3.3.1 git commit", "tags": ["patch"], "url": "https://github.com/openssl/openssl/commit/e5093133c35ca82874ad83697af76f4b0f7e3bd8"}, {"name": "3.2.2 git commit", "tags": ["patch"], "url": "https://github.com/openssl/openssl/commit/c88c3de51020c37e8706bf7a682a162593053aac"}, {"name": "3.1.6 git commit", "tags": ["patch"], "url": "https://github.com/openssl/openssl/commit/704f725b96aa373ee45ecfb23f6abfe8be8d9177"}, {"name": "3.0.14 git commit", "tags": ["patch"], "url": "https://github.com/openssl/openssl/commit/b3f0eb0a295f58f16ba43ba99dad70d4ee5c437d"}, {"name": "1.1.1y git commit", "tags": ["patch"], "url": "https://github.openssl.org/openssl/extended-releases/commit/f7a045f3143fc6da2ee66bf52d8df04829590dd4"}], "source": {"discovery": "UNKNOWN"}, "title": "Use After Free with SSL_free_buffers", "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-11-06T21:40:09.343062Z", "id": "CVE-2024-4741", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-06T21:40:56.289Z"}}, {"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2024/11/msg00000.html"}, {"url": "https://lists.debian.org/debian-lts-announce/2024/10/msg00033.html"}, {"url": "https://security.netapp.com/advisory/ntap-20240621-0004/"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-04T17:26:59.261Z"}}]}}

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Again a call to SSL_free_buffers will succeed even though the buffer\nis still in use.\n\nWhile these scenarios could occur accidentally during normal operation a\nmalicious attacker could attempt to engineer a stituation where this occurs.\nWe are not aware of this issue being actively exploited.\n\nThe FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this issue.", "supportingMedia": [{"type": "text/html", "value": "Issue summary: Calling the OpenSSL API function SSL_free_buffers may cause<br>memory to be accessed that was previously freed in some situations<br><br>Impact summary: A use after free can have a range of potential consequences such<br>as the corruption of valid data, crashes or execution of arbitrary code.<br>However, only applications that directly call the SSL_free_buffers function are<br>affected by this issue. Applications that do not call this function are not<br>vulnerable. Our investigations indicate that this function is rarely used by<br>applications.<br><br>The SSL_free_buffers function is used to free the internal OpenSSL buffer used<br>when processing an incoming record from the network. The call is only expected<br>to succeed if the buffer is not currently in use. However, two scenarios have<br>been identified where the buffer is freed even when still in use.<br><br>The first scenario occurs where a record header has been received from the<br>network and processed by OpenSSL, but the full record body has not yet arrived.<br>In this case calling SSL_free_buffers will succeed even though a record has only<br>been partially processed and the buffer is still in use.<br><br>The second scenario occurs where a full record containing application data has<br>been received and processed by OpenSSL but the application has only read part of<br>this data. 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Applications that do not call this function are not\nvulnerable. Our investigations indicate that this function is rarely used by\napplications.\n\nThe SSL_free_buffers function is used to free the internal OpenSSL buffer used\nwhen processing an incoming record from the network. The call is only expected\nto succeed if the buffer is not currently in use. However, two scenarios have\nbeen identified where the buffer is freed even when still in use.\n\nThe first scenario occurs where a record header has been received from the\nnetwork and processed by OpenSSL, but the full record body has not yet arrived.\nIn this case calling SSL_free_buffers will succeed even though a record has only\nbeen partially processed and the buffer is still in use.\n\nThe second scenario occurs where a full record containing application data has\nbeen received and processed by OpenSSL but the application has only read part of\nthis data. Again a call to SSL_free_buffers will succeed even though the buffer\nis still in use.\n\nWhile these scenarios could occur accidentally during normal operation a\nmalicious attacker could attempt to engineer a stituation where this occurs.\nWe are not aware of this issue being actively exploited.\n\nThe FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this issue."}, {"lang": "es", "value": "Resumen del problema: Llamar a la funci\u00f3n de API de OpenSSL SSL_free_buffers puede provocar que se acceda a la memoria que se liber\u00f3 previamente en algunas situaciones Resumen del impacto: Un use after free puede tener una variedad de posibles consecuencias, como la corrupci\u00f3n de datos v\u00e1lidos, fallas o ejecuci\u00f3n de c\u00f3digo arbitrario. Sin embargo, solo las aplicaciones que llaman directamente a la funci\u00f3n SSL_free_buffers se ven afectadas por este problema. Las aplicaciones que no llaman a esta funci\u00f3n no son vulnerables. Nuestras investigaciones indican que las aplicaciones rara vez usan esta funci\u00f3n. La funci\u00f3n SSL_free_buffers se usa para liberar el b\u00fafer interno de OpenSSL que se usa al procesar un registro entrante de la red. Solo se espera que la llamada tenga \u00e9xito si el b\u00fafer no est\u00e1 actualmente en uso. Sin embargo, se han identificado dos escenarios en los que el b\u00fafer se libera incluso cuando todav\u00eda est\u00e1 en uso. El primer escenario ocurre cuando se recibi\u00f3 un encabezado de registro de la red y OpenSSL lo proces\u00f3, pero a\u00fan no lleg\u00f3 el cuerpo completo del registro. En este caso, llamar a SSL_free_buffers tendr\u00e1 \u00e9xito incluso si un registro solo se proces\u00f3 parcialmente y el b\u00fafer todav\u00eda est\u00e1 en uso. El segundo escenario ocurre cuando OpenSSL ha recibido y procesado un registro completo que contiene datos de la aplicaci\u00f3n, pero la aplicaci\u00f3n solo ha le\u00eddo parte de estos datos. Nuevamente, una llamada a SSL_free_buffers tendr\u00e1 \u00e9xito aunque el b\u00fafer a\u00fan est\u00e9 en uso. Si bien estos escenarios podr\u00edan ocurrir accidentalmente durante el funcionamiento normal, un atacante malintencionado podr\u00eda intentar crear una situaci\u00f3n en la que esto ocurra. No tenemos conocimiento de que este problema se est\u00e9 explotando activamente. Los m\u00f3dulos FIPS en 3.3, 3.2, 3.1 y 3.0 no se ven afectados por este problema."}], "id": "CVE-2024-4741", "lastModified": "2026-11-09T17:27:44.183", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-4741", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T21:40:09.343062Z", "version": "2.0.3"}}]}, "published": "2024-11-13T11:15:04.480", "references": [{"source": "openssl-security@openssl.org", "tags": ["Patch"], "url": "https://github.com/openssl/openssl/commit/704f725b96aa373ee45ecfb23f6abfe8be8d9177"}, {"source": "openssl-security@openssl.org", "tags": ["Patch"], "url": "https://github.com/openssl/openssl/commit/b3f0eb0a295f58f16ba43ba99dad70d4ee5c437d"}, {"source": "openssl-security@openssl.org", "tags": ["Patch"], "url": "https://github.com/openssl/openssl/commit/c88c3de51020c37e8706bf7a682a162593053aac"}, {"source": "openssl-security@openssl.org", "tags": ["Patch"], "url": "https://github.com/openssl/openssl/commit/e5093133c35ca82874ad83697af76f4b0f7e3bd8"}, {"source": "openssl-security@openssl.org", "tags": ["Permissions Required"], "url": "https://github.openssl.org/openssl/extended-releases/commit/f7a045f3143fc6da2ee66bf52d8df04829590dd4"}, {"source": "openssl-security@openssl.org", "tags": ["Vendor Advisory"], "url": "https://www.openssl.org/news/secadv/20240528.txt"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2024/10/msg00033.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2024/11/msg00000.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20240621-0004/"}], "sourceIdentifier": "openssl-security@openssl.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "openssl-security@openssl.org", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2024:9333", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "openssl-1:3.2.2-6.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}, {"advisory": "RHSA-2024:9333", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "openssl-1:3.2.2-6.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}], "bugzilla": {"description": "openssl: Use After Free with SSL_free_buffers", "id": "2283757", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2283757"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.6", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L", "status": "verified"}, "cwe": "CWE-416", "details": ["Issue summary: Calling the OpenSSL API function SSL_free_buffers may cause\nmemory to be accessed that was previously freed in some situations\nImpact summary: A use after free can have a range of potential consequences such\nas the corruption of valid data, crashes or execution of arbitrary code.\nHowever, only applications that directly call the SSL_free_buffers function are\naffected by this issue. Applications that do not call this function are not\nvulnerable. Our investigations indicate that this function is rarely used by\napplications.\nThe SSL_free_buffers function is used to free the internal OpenSSL buffer used\nwhen processing an incoming record from the network. The call is only expected\nto succeed if the buffer is not currently in use. However, two scenarios have\nbeen identified where the buffer is freed even when still in use.\nThe first scenario occurs where a record header has been received from the\nnetwork and processed by OpenSSL, but the full record body has not yet arrived.\nIn this case calling SSL_free_buffers will succeed even though a record has only\nbeen partially processed and the buffer is still in use.\nThe second scenario occurs where a full record containing application data has\nbeen received and processed by OpenSSL but the application has only read part of\nthis data. Again a call to SSL_free_buffers will succeed even though the buffer\nis still in use.\nWhile these scenarios could occur accidentally during normal operation a\nmalicious attacker could attempt to engineer a stituation where this occurs.\nWe are not aware of this issue being actively exploited.\nThe FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this issue.", "A use-after-free vulnerability was found in OpenSSL. Calling the OpenSSL API SSL_free_buffers function may cause memory to be accessed that was previously freed in some situations."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2024-4741", "package_state": [{"cpe": "cpe:/a:redhat:logging:5", "fix_state": "Affected", "package_name": "openshift-logging/fluentd-rhel8", "product_name": "Logging Subsystem for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Fix deferred", "package_name": "3scale-amp-backend-container", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "edk2", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "openssl", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "shim", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Affected", "package_name": "openssl", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "ovmf", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "compat-openssl10", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "edk2", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "mingw-openssl", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "openssl", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "shim", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "shim-unsigned-x64", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "compat-openssl11", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "edk2", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "shim", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "shim-unsigned-aarch64", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "shim-unsigned-x64", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:jboss_core_services:1", "fix_state": "Fix deferred", "package_name": "openssl", "product_name": "Red Hat JBoss Core Services"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5", "fix_state": "Fix deferred", "package_name": "openssl", "product_name": "Red Hat JBoss Web Server 5"}], "public_date": "2024-05-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-4741\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-4741\nhttps://www.openssl.org/news/secadv/20240528.txt"], "statement": "This vulnerability is classified as low severity rather than moderate because it only affects applications that explicitly call SSL_free_buffers, a rarely used OpenSSL function. \nThe issue arises in specific conditions where the function is called while a buffer is still in use, leading to a potential use-after-free scenario. However, exploitation is significantly constrained because\n(1) an application must intentionally invoke this function, which is not typical in common OpenSSL usage, \n(2) triggering the vulnerability requires precise timing and conditions where partially processed records remain unread or incomplete, and \n(3) there are no known active exploits leveraging this issue. \nGiven these factors, while the bug could theoretically lead to crashes or corruption, the practical risk of widespread exploitation remains minimal.", "threat_severity": "Low"}

{}