CVE-2022-24795

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La l\u00f3gica de reasignaci\u00f3n en \"yajl_buf.c#L64\" puede hacer que el entero de 32 bits \"need\" sea convertido en 0 cuando \"need\" es acercado a un valor de 0x80000000 (es decir, ~2GB de datos), lo que resulta en una reasignaci\u00f3n de buf-)alloc en un peque\u00f1o trozo de pila. Estos enteros est\u00e1n declarados como \"size_t\" en la rama 2.x de \"yajl\", lo que pr\u00e1cticamente evita que el problema ses desencadenado en plataformas de 64 bits, sin embargo esto no impide que este problema sea desencadenado en construcciones de 32 bits en las que \"size_t\" es un entero de 32 bits. El poblamiento posterior de este trozo de pila infra asignado es basado en el tama\u00f1o original del buffer, conllevando una corrupci\u00f3n de la memoria de la pila. Esta vulnerabilidad afecta principalmente a la disponibilidad de los procesos. Los mantenedores creen que la explotaci\u00f3n para una ejecuci\u00f3n de c\u00f3digo arbitrario es poco probable. Se presenta un parche disponible y se espera que forme parte de la versi\u00f3n 1.4.2. Como medida de mitigaci\u00f3n, evite pasar entradas grandes a YAJL"}], "id": "CVE-2022-24795", "lastModified": "2026-06-17T04:32:32.170", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-24795", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-04-22T15:49:09.360664Z", "version": "2.0.3"}}]}, "published": "2022-04-05T16:15:14.050", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/brianmario/yajl-ruby/blob/7168bd79b888900aa94523301126f968a93eb3a6/ext/yajl/yajl_buf.c#L64"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/brianmario/yajl-ruby/commit/7168bd79b888900aa94523301126f968a93eb3a6"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/brianmario/yajl-ruby/security/advisories/GHSA-jj47-x69x-mxrm"}, {"source": "security-advisories@github.com", "url": "https://lists.debian.org/debian-lts-announce/2023/07/msg00013.html"}, {"source": "security-advisories@github.com", "url": "https://lists.debian.org/debian-lts-announce/2023/08/msg00003.html"}, {"source": "security-advisories@github.com", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KLE3C4CECEJ4EUYI56KXI6OWACWXX7WN/"}, {"source": "security-advisories@github.com", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YO32YDJ74DADC7CMJNLSLBVWN5EXGF5J/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/brianmario/yajl-ruby/blob/7168bd79b888900aa94523301126f968a93eb3a6/ext/yajl/yajl_buf.c#L64"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/brianmario/yajl-ruby/commit/7168bd79b888900aa94523301126f968a93eb3a6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/brianmario/yajl-ruby/security/advisories/GHSA-jj47-x69x-mxrm"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2023/07/msg00013.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2023/08/msg00003.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KLE3C4CECEJ4EUYI56KXI6OWACWXX7WN/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YO32YDJ74DADC7CMJNLSLBVWN5EXGF5J/"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-122"}, {"lang": "en", "value": "CWE-190"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2022:7524", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "yajl-0:2.1.0-11.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2022-11-08T00:00:00Z"}, {"advisory": "RHSA-2024:2063", "cpe": "cpe:/a:redhat:rhel_eus:8.6", "package": "yajl-0:2.1.0-13.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Extended Update Support", "release_date": "2024-04-25T00:00:00Z"}, {"advisory": "RHSA-2022:8252", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "yajl-0:2.1.0-21.el9", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-11-15T00:00:00Z"}], "bugzilla": {"description": "yajl: heap-based buffer overflow when handling large inputs due to an integer overflow", "id": "2072912", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2072912"}, "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:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-190->CWE-119", "details": ["yajl-ruby is a C binding to the YAJL JSON parsing and generation library. The 1.x branch and the 2.x branch of `yajl` contain an integer overflow which leads to subsequent heap memory corruption when dealing with large (~2GB) inputs. The reallocation logic at `yajl_buf.c#L64` may result in the `need` 32bit integer wrapping to 0 when `need` approaches a value of 0x80000000 (i.e. ~2GB of data), which results in a reallocation of buf->alloc into a small heap chunk. These integers are declared as `size_t` in the 2.x branch of `yajl`, which practically prevents the issue from triggering on 64bit platforms, however this does not preclude this issue triggering on 32bit builds on which `size_t` is a 32bit integer. Subsequent population of this under-allocated heap chunk is based on the original buffer size, leading to heap memory corruption. This vulnerability mostly impacts process availability. Maintainers believe exploitation for arbitrary code execution is unlikely. A patch is available and anticipated to be part of yajl-ruby version 1.4.2. As a workaround, avoid passing large inputs to YAJL.", "A flaw was found in the YAJL library in the way it reallocates a memory buffer to store more data. A very large input causes the value used to calculate the buffer size to overflow, resulting in a heap-based buffer overflow."], "mitigation": {"lang": "en:us", "value": "Avoid passing large inputs to the YAJL library."}, "name": "CVE-2022-24795", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "yajl", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "yajl", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "libreoffice:flatpak/yajl", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "libreoffice:flatpak/yajl", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:3.11", "fix_state": "Out of support scope", "package_name": "rubygem-yajl-ruby", "product_name": "Red Hat OpenShift Container Platform 3.11"}], "public_date": "2022-04-05T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-24795\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-24795"], "statement": "Red Hat Enterprise Linux only ships YAJL 2.x versions and on 32-bit systems, more than 2GiB of data will be required for triggering this bug. However, on 64-bit systems, more than 9EiB of data will be needed, making this vulnerability very hard to be exploited on these systems.", "threat_severity": "Moderate"}

{}