CVE-2024-4741 (GCVE-0-2024-4741)

Vulnerability from cvelistv5 – Published: 2024-11-13 10:20 – Updated: 2025-11-04 17:26
VLAI
Title
Use After Free with SSL_free_buffers
Summary
Issue summary: Calling the OpenSSL API function SSL_free_buffers may cause memory to be accessed that was previously freed in some situations Impact summary: A use after free can have a range of potential consequences such as the corruption of valid data, crashes or execution of arbitrary code. However, only applications that directly call the SSL_free_buffers function are affected by this issue. Applications that do not call this function are not vulnerable. Our investigations indicate that this function is rarely used by applications. The SSL_free_buffers function is used to free the internal OpenSSL buffer used when processing an incoming record from the network. The call is only expected to succeed if the buffer is not currently in use. However, two scenarios have been identified where the buffer is freed even when still in use. The first scenario occurs where a record header has been received from the network and processed by OpenSSL, but the full record body has not yet arrived. In this case calling SSL_free_buffers will succeed even though a record has only been partially processed and the buffer is still in use. The second scenario occurs where a full record containing application data has been received and processed by OpenSSL but the application has only read part of this data. Again a call to SSL_free_buffers will succeed even though the buffer is still in use. While these scenarios could occur accidentally during normal operation a malicious attacker could attempt to engineer a stituation where this occurs. We are not aware of this issue being actively exploited. The FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this issue.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
OpenSSL OpenSSL Affected: 3.3.0 , < 3.3.1 (semver)
Affected: 3.2.0 , < 3.2.2 (semver)
Affected: 3.1.0 , < 3.1.6 (semver)
Affected: 3.0.0 , < 3.0.14 (semver)
Affected: 1.1.1 , < 1.1.1y (custom)
Create a notification for this product.
openssl openssl Affected: 1.1.1 , < 1.1.1y (semver)
Affected: 3.0.0 , < 3.0.14 (semver)
Affected: 3.1.0 , < 3.1.6 (semver)
Affected: 3.2.0 , < 3.2.2 (semver)
Affected: 3.3.0 , < 3.3.1 (semver)
    cpe:2.3:a:openssl:openssl:-:*:*:*:*:*:*:*
 Create a notification for this product.
Date Public
2024-05-27 23:00
Credits
William Ahern (Akamai) Matt Caswell Watson Ladd (Akamai)
Show details on NVD website
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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.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"openssl-security@openssl.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"references\":[{\"url\":\"https://github.com/openssl/openssl/commit/704f725b96aa373ee45ecfb23f6abfe8be8d9177\",\"source\":\"openssl-security@openssl.org\"},{\"url\":\"https://github.com/openssl/openssl/commit/b3f0eb0a295f58f16ba43ba99dad70d4ee5c437d\",\"source\":\"openssl-security@openssl.org\"},{\"url\":\"https://github.com/openssl/openssl/commit/c88c3de51020c37e8706bf7a682a162593053aac\",\"source\":\"openssl-security@openssl.org\"},{\"url\":\"https://github.com/openssl/openssl/commit/e5093133c35ca82874ad83697af76f4b0f7e3bd8\",\"source\":\"openssl-security@openssl.org\"},{\"url\":\"https://github.openssl.org/openssl/extended-releases/commit/f7a045f3143fc6da2ee66bf52d8df04829590dd4\",\"source\":\"openssl-security@openssl.org\"},{\"url\":\"https://www.openssl.org/news/secadv/20240528.txt\",\"source\":\"openssl-security@openssl.org\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/10/msg00033.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/11/msg00000.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://security.netapp.com/advisory/ntap-20240621-0004/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"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\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-4741\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-11-13T14:45:07.092438Z\"}}}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:openssl:openssl:-:*:*:*:*:*:*:*\"], \"vendor\": \"openssl\", \"product\": \"openssl\", \"versions\": [{\"status\": \"affected\", \"version\": \"1.1.1\", \"lessThan\": \"1.1.1y\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.0.0\", \"lessThan\": \"3.0.14\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.1.0\", \"lessThan\": \"3.1.6\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.2.0\", \"lessThan\": \"3.2.2\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.3.0\", \"lessThan\": \"3.3.1\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unknown\"}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-11-13T14:48:43.735Z\"}}], \"cna\": {\"title\": \"Use After Free with SSL_free_buffers\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"William Ahern (Akamai)\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"Matt Caswell\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"Watson Ladd (Akamai)\"}], \"metrics\": [{\"other\": {\"type\": \"https://www.openssl.org/policies/secpolicy.html\", \"content\": {\"text\": \"Low\"}}, \"format\": \"other\"}], \"affected\": [{\"vendor\": \"OpenSSL\", \"product\": \"OpenSSL\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.3.0\", \"lessThan\": \"3.3.1\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.2.0\", \"lessThan\": \"3.2.2\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.1.0\", \"lessThan\": \"3.1.6\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.0.0\", \"lessThan\": \"3.0.14\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"1.1.1\", \"lessThan\": \"1.1.1y\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2024-05-27T23:00:00.000Z\", \"references\": [{\"url\": \"https://www.openssl.org/news/secadv/20240528.txt\", \"name\": \"OpenSSL Advisory\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/e5093133c35ca82874ad83697af76f4b0f7e3bd8\", \"name\": \"3.3.1 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/c88c3de51020c37e8706bf7a682a162593053aac\", \"name\": \"3.2.2 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/704f725b96aa373ee45ecfb23f6abfe8be8d9177\", \"name\": \"3.1.6 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/b3f0eb0a295f58f16ba43ba99dad70d4ee5c437d\", \"name\": \"3.0.14 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.openssl.org/openssl/extended-releases/commit/f7a045f3143fc6da2ee66bf52d8df04829590dd4\", \"name\": \"1.1.1y git commit\", \"tags\": [\"patch\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Issue summary: Calling the OpenSSL API function SSL_free_buffers may cause\u003cbr\u003ememory to be accessed that was previously freed in some situations\u003cbr\u003e\u003cbr\u003eImpact summary: A use after free can have a range of potential consequences such\u003cbr\u003eas the corruption of valid data, crashes or execution of arbitrary code.\u003cbr\u003eHowever, only applications that directly call the SSL_free_buffers function are\u003cbr\u003eaffected by this issue. Applications that do not call this function are not\u003cbr\u003evulnerable. Our investigations indicate that this function is rarely used by\u003cbr\u003eapplications.\u003cbr\u003e\u003cbr\u003eThe SSL_free_buffers function is used to free the internal OpenSSL buffer used\u003cbr\u003ewhen processing an incoming record from the network. The call is only expected\u003cbr\u003eto succeed if the buffer is not currently in use. However, two scenarios have\u003cbr\u003ebeen identified where the buffer is freed even when still in use.\u003cbr\u003e\u003cbr\u003eThe first scenario occurs where a record header has been received from the\u003cbr\u003enetwork and processed by OpenSSL, but the full record body has not yet arrived.\u003cbr\u003eIn this case calling SSL_free_buffers will succeed even though a record has only\u003cbr\u003ebeen partially processed and the buffer is still in use.\u003cbr\u003e\u003cbr\u003eThe second scenario occurs where a full record containing application data has\u003cbr\u003ebeen received and processed by OpenSSL but the application has only read part of\u003cbr\u003ethis data. Again a call to SSL_free_buffers will succeed even though the buffer\u003cbr\u003eis still in use.\u003cbr\u003e\u003cbr\u003eWhile these scenarios could occur accidentally during normal operation a\u003cbr\u003emalicious attacker could attempt to engineer a stituation where this occurs.\u003cbr\u003eWe are not aware of this issue being actively exploited.\u003cbr\u003e\u003cbr\u003eThe FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this issue.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"shortName\": \"openssl\", \"dateUpdated\": \"2024-11-13T10:20:50.711Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-4741\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-04T17:26:59.261Z\", \"dateReserved\": \"2024-05-10T09:56:11.310Z\", \"assignerOrgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"datePublished\": \"2024-11-13T10:20:50.711Z\", \"assignerShortName\": \"openssl\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.