github - ghsa-48qq-74v6-m9rv

ghsa-48qq-74v6-m9rv

Vulnerability from github

Published

2024-03-15 21:30

Modified

2024-03-15 21:30

Details

In the Linux kernel, the following vulnerability has been resolved:

mptcp: fix sk_forward_memory corruption on retransmission

MPTCP sk_forward_memory handling is a bit special, as such field is protected by the msk socket spin_lock, instead of the plain socket lock.

Currently we have a code path updating such field without handling the relevant lock:

__mptcp_retrans() -> __mptcp_clean_una_wakeup()

Several helpers in __mptcp_clean_una_wakeup() will update sk_forward_alloc, possibly causing such field corruption, as reported by Matthieu.

Address the issue providing and using a new variant of blamed function which explicitly acquires the msk spin lock.

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47132"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-03-15T21:15:07Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: fix sk_forward_memory corruption on retransmission\n\nMPTCP sk_forward_memory handling is a bit special, as such field\nis protected by the msk socket spin_lock, instead of the plain\nsocket lock.\n\nCurrently we have a code path updating such field without handling\nthe relevant lock:\n\n__mptcp_retrans() -\u003e __mptcp_clean_una_wakeup()\n\nSeveral helpers in __mptcp_clean_una_wakeup() will update\nsk_forward_alloc, possibly causing such field corruption, as reported\nby Matthieu.\n\nAddress the issue providing and using a new variant of blamed function\nwhich explicitly acquires the msk spin lock.",
  "id": "GHSA-48qq-74v6-m9rv",
  "modified": "2024-03-15T21:30:44Z",
  "published": "2024-03-15T21:30:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47132"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b5941f066b4ca331db225a976dae1d6ca8cf0ae3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b9c78b1a95966a7bd2ddae05b73eafc0cda4fba3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

cve-2021-47132

Vulnerability from cvelistv5

Published

2024-03-15 20:14

Modified

2024-11-04 12:00

Severity ?

Summary

mptcp: fix sk_forward_memory corruption on retransmission

References

▼	URL	Tags
	https://git.kernel.org/stable/c/b9c78b1a95966a7bd2ddae05b73eafc0cda4fba3
	https://git.kernel.org/stable/c/b5941f066b4ca331db225a976dae1d6ca8cf0ae3

Impacted products

▼	Vendor	Product
	Linux	Linux
	Linux	Linux

Show details on NVD website

JSON

To clipboard

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                "role": "CISA Coordinator",
                "timestamp": "2024-03-18T15:54:25.829185Z",
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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.

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