CVE-2021-47248 - Vulnerability Details - OpenCVE

ReportizFlow

In the Linux kernel, the following vulnerability has been resolved: udp: fix race between close() and udp_abort() Kaustubh reported and diagnosed a panic in udp_lib_lookup(). The root cause is udp_abort() racing with close(). Both racing functions acquire the socket lock, but udp{v6}_destroy_sock() release it before performing destructive actions. We can't easily extend the socket lock scope to avoid the race, instead use the SOCK_DEAD flag to prevent udp_abort from doing any action when the critical race happens. Diagnosed-and-tested-by: Kaustubh Pandey <[email protected]>

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

No data.

No data.

No data.

References

Link	Providers
https://git.kernel.org/stable/c/2f73448041bd0682d4b552cfd314ace66107f1ad
https://git.kernel.org/stable/c/5a88477c1c85e4baa51e91f2d40f2166235daa56
https://git.kernel.org/stable/c/65310b0aff86980a011c7c7bfa487a333d4ca241
https://git.kernel.org/stable/c/8729ec8a2238152a4afc212a331a6cd2c61aeeac
https://git.kernel.org/stable/c/a0882f68f54f7a8b6308261acee9bd4faab5a69e
https://git.kernel.org/stable/c/a8b897c7bcd47f4147d066e22cc01d1026d7640e
https://git.kernel.org/stable/c/e3c36c773aed0fef8b1d3d555b43393ec564400f
https://lore.kernel.org/linux-cve-announce/2024052143-CVE-2021-47248-2609@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2021-47248
https://www.cve.org/CVERecord?id=CVE-2021-47248

History

Mon, 04 Nov 2024 12:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2024-05-21T14:19:45.588Z

Updated: 2024-12-19T07:38:11.720Z

Reserved: 2024-04-10T18:59:19.536Z

Link: CVE-2021-47248

Vulnrichment

Updated: 2024-08-04T05:32:07.937Z

NVD

Status : Awaiting Analysis

Published: 2024-05-21T15:15:13.780

Modified: 2024-11-21T06:35:43.190

Link: CVE-2021-47248

Redhat

Severity : Moderate

Publid Date: 2024-05-21T00:00:00Z

Links: CVE-2021-47248 - Bugzilla

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{"bugzilla": {"description": "kernel: udp: fix race between close() and udp_abort()", "id": "2282564", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282564"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H", "status": "draft"}, "cwe": "CWE-362", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nudp: fix race between close() and udp_abort()\nKaustubh reported and diagnosed a panic in udp_lib_lookup().\nThe root cause is udp_abort() racing with close(). Both\nracing functions acquire the socket lock, but udp{v6}_destroy_sock()\nrelease it before performing destructive actions.\nWe can't easily extend the socket lock scope to avoid the race,\ninstead use the SOCK_DEAD flag to prevent udp_abort from doing\nany action when the critical race happens.\nDiagnosed-and-tested-by: Kaustubh Pandey <[email protected]>", "A vulnerability was found in the Linux kernel's UDP implementation, where a race condition exists between the close() and udp_abort() functions. This race can cause a system panic during socket operations, leading to unexpected crashes"], "mitigation": {"lang": "en:us", "value": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible."}, "name": "CVE-2021-47248", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47248\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47248\nhttps://lore.kernel.org/linux-cve-announce/2024052143-CVE-2021-47248-2609@gregkh/T"], "statement": "This vulnerability is rated as a moderate severity because this issue results in system crashes under specific conditions and exploitation requires precise timing.", "threat_severity": "Moderate", "upstream_fix": "kernel 4.9.274, kernel 4.14.238, kernel 4.19.196, kernel 5.4.128, kernel 5.10.46, kernel 5.12.13, kernel 5.13"}