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CVE-2023-0240 (GCVE-0-2023-0240)

Vulnerability from cvelistv5 – Published: 2023-01-30 13:17 – Updated: 2024-08-02 05:02
VLAI
Title
Use after free in io_uring in the Linux Kernel
Summary
There is a logic error in io_uring's implementation which can be used to trigger a use-after-free vulnerability leading to privilege escalation. In the io_prep_async_work function the assumption that the last io_grab_identity call cannot return false is not true, and in this case the function will use the init_cred or the previous linked requests identity to do operations instead of using the current identity. This can lead to reference counting issues causing use-after-free. We recommend upgrading past version 5.10.161.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-01 18:22 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Kernel Affected: 5.10 , ≤ 5.10.161 (custom)
guessed Create a notification for this product.
linux linux_kernel Affected: 5.10 , ≤ 5.10.161 (custom)
    cpe:2.3:o:linux:linux_kernel:5.10:-:*:*:*:*:*:*
Create a notification for this product.
Date Public
2022-12-22 14:30
Credits
Bing-Jhong Billy Jheng of Starlabs
Show details on NVD website
To clipboard 

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      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://security.netapp.com/advisory/ntap-20230316-0001/\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-07-31T20:13:40.095Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-0240\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-08-01T18:22:24.961145Z\"}}}], \"affected\": [{\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:5.10:-:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.10\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.10.161\"}], \"defaultStatus\": \"unaffected\"}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-08-01T18:38:05.902Z\"}}], \"cna\": {\"title\": \"Use after free in io_uring in the Linux Kernel\", \"source\": {\"discovery\": \"EXTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"user\": \"00000000-0000-4000-9000-000000000000\", \"value\": \"Bing-Jhong Billy Jheng of Starlabs\"}], \"impacts\": [{\"capecId\": \"CAPEC-233\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-233 Privilege Escalation\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org\", \"vendor\": \"Linux\", \"product\": \"Linux Kernel\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.10\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.10.161\"}], \"packageName\": \"io_uring\", \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2022-12-22T14:30:00.000Z\", \"references\": [{\"url\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y\u0026id=788d0824269bef539fe31a785b1517882eafed93\"}, {\"url\": \"https://github.com/gregkh/linux/commit/1e6fa5216a0e59ef02e8b6b40d553238a3b81d49\"}, {\"url\": \"https://kernel.dance/#788d0824269bef539fe31a785b1517882eafed93\"}], \"x_generator\": {\"engine\": \"Vulnogram 0.1.0-dev\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"There is a logic error in io_uring\u0027s implementation which can be used to trigger a use-after-free vulnerability leading to privilege escalation.\\n\\nIn the io_prep_async_work function the assumption that the last io_grab_identity call cannot return false is not true, and in this case the function will use the init_cred or the previous linked requests identity to do operations instead of using the current identity. This can lead to reference counting issues causing use-after-free. We recommend upgrading past version 5.10.161.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"There is a logic error in io_uring\u0027s implementation which can be used to trigger a use-after-free vulnerability leading to privilege escalation.\u003cbr\u003e\u003cbr\u003eIn the io_prep_async_work function the assumption that the last io_grab_identity call cannot return false is not true, and in this case the function will use the init_cred or the previous linked requests identity to do operations instead of using the current identity. This can lead to reference counting issues causing use-after-free. We recommend upgrading past version 5.10.161.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"14ed7db2-1595-443d-9d34-6215bf890778\", \"shortName\": \"Google\", \"dateUpdated\": \"2023-01-30T13:17:09.182Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-0240\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-08-01T18:38:39.043Z\", \"dateReserved\": \"2023-01-12T13:04:00.937Z\", \"assignerOrgId\": \"14ed7db2-1595-443d-9d34-6215bf890778\", \"datePublished\": \"2023-01-30T13:17:09.182Z\", \"assignerShortName\": \"Google\"}",
      "dataType": "CVE_RECORD",
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}



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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.