CVE-2021-3491
Vulnerability from cvelistv5
Published
2021-06-04 01:40
Modified
2024-09-16 22:09
Severity ?
EPSS score ?
Summary
Linux kernel io_uring PROVIDE_BUFFERS MAX_RW_COUNT bypass
References
▼ | URL | Tags | |
---|---|---|---|
security@ubuntu.com | https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1f82808877bb10d3deee7cf3374a4eb3fb582db | Patch, Vendor Advisory | |
security@ubuntu.com | https://security.netapp.com/advisory/ntap-20210716-0004/ | Third Party Advisory | |
security@ubuntu.com | https://ubuntu.com/security/notices/USN-4949-1 | Third Party Advisory | |
security@ubuntu.com | https://ubuntu.com/security/notices/USN-4950-1 | Third Party Advisory | |
security@ubuntu.com | https://www.openwall.com/lists/oss-security/2021/05/11/13 | Mailing List, Patch, Third Party Advisory | |
security@ubuntu.com | https://www.zerodayinitiative.com/advisories/ZDI-21-589/ | Third Party Advisory, VDB Entry |
Impacted products
▼ | Vendor | Product |
---|---|---|
Linux | Linux kernel |
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This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was addressed via commit d1f82808877b (\"io_uring: truncate lengths larger than MAX_RW_COUNT on provide buffers\") (v5.13-rc1) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. 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This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was addressed via commit d1f82808877b (\"io_uring: truncate lengths larger than MAX_RW_COUNT on provide buffers\") (v5.13-rc1) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced in ddf0322db79c (\"io_uring: add IORING_OP_PROVIDE_BUFFERS\") (v5.7-rc1)." } ] }, "generator": { "engine": "Vulnogram 0.0.9" }, "impact": { "cvss": { "attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1" } }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "CWE-131 Incorrect Calculation of Buffer Size" } ] } ] }, "references": { "reference_data": [ { "name": "https://ubuntu.com/security/notices/USN-4950-1", "refsource": "UBUNTU", "url": "https://ubuntu.com/security/notices/USN-4950-1" }, { "name": "https://ubuntu.com/security/notices/USN-4949-1", "refsource": "UBUNTU", "url": "https://ubuntu.com/security/notices/USN-4949-1" }, { "name": "[oss-security] CVE-2021-3491 - Linux kernel io_uring PROVIDE_BUFFERS MAX_RW_COUNT bypass", "refsource": "MLIST", "url": "https://www.openwall.com/lists/oss-security/2021/05/11/13" }, { "name": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1f82808877bb10d3deee7cf3374a4eb3fb582db", "refsource": "MISC", "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1f82808877bb10d3deee7cf3374a4eb3fb582db" }, { "name": "https://www.zerodayinitiative.com/advisories/ZDI-21-589/", "refsource": "MISC", "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-589/" }, { "name": "https://security.netapp.com/advisory/ntap-20210716-0004/", "refsource": "CONFIRM", "url": "https://security.netapp.com/advisory/ntap-20210716-0004/" } ] }, "source": { "discovery": "EXTERNAL" } } } }, "cveMetadata": { "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "assignerShortName": "canonical", "cveId": "CVE-2021-3491", "datePublished": "2021-06-04T01:40:20.936072Z", "dateReserved": "2021-04-09T00:00:00", "dateUpdated": "2024-09-16T22:09:25.883Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2021-3491\",\"sourceIdentifier\":\"security@ubuntu.com\",\"published\":\"2021-06-04T02:15:07.253\",\"lastModified\":\"2021-09-14T14:31:37.070\",\"vulnStatus\":\"Analyzed\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"The io_uring subsystem in the Linux kernel allowed the MAX_RW_COUNT limit to be bypassed in the PROVIDE_BUFFERS operation, which led to negative values being usedin mem_rw when reading /proc/\u003cPID\u003e/mem. This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was addressed via commit d1f82808877b (\\\"io_uring: truncate lengths larger than MAX_RW_COUNT on provide buffers\\\") (v5.13-rc1) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced in ddf0322db79c (\\\"io_uring: add IORING_OP_PROVIDE_BUFFERS\\\") (v5.7-rc1).\"},{\"lang\":\"es\",\"value\":\"El subsistema io_uring del kernel de Linux permit\u00eda saltarse el l\u00edmite MAX_RW_COUNT en la operaci\u00f3n PROVIDE_BUFFERS, lo que llevaba a utilizar valores negativos en mem_rw al leer /proc//mem. Esto pod\u00eda utilizarse para crear un desbordamiento de la pila que conduc\u00eda a la ejecuci\u00f3n de c\u00f3digo arbitrario en el kernel. Se solucion\u00f3 mediante el commit d1f82808877b (\\\"io_uring: truncate lengths larger than MAX_RW_COUNT on provide buffers\\\") (v5.13-rc1) y se retroaliment\u00f3 a los kernels estables en versiones v5.12.4, v5.11.21 y v5.10.37. 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Sightings
Author | Source | Type | Date |
---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.