CVE-2023-52732 ceph: blocklist the kclient when receiving corrupted snap trace

2024-05-2115:22:57

Linux

github.com

linux kernel

ceph

corrupted snap trace

vulnerability

io access

mds

AI Score

6.7

Confidence

Low

EPSS

Percentile

9.0%

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

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

ceph: blocklist the kclient when receiving corrupted snap trace

When received corrupted snap trace we don’t know what exactly has
happened in MDS side. And we shouldn’t continue IOs and metadatas
access to MDS, which may corrupt or get incorrect contents.

This patch will just block all the further IO/MDS requests
immediately and then evict the kclient itself.

The reason why we still need to evict the kclient just after
blocking all the further IOs is that the MDS could revoke the caps
faster.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/ceph/addr.c",
      "fs/ceph/caps.c",
      "fs/ceph/file.c",
      "fs/ceph/mds_client.c",
      "fs/ceph/snap.c",
      "fs/ceph/super.h"
    ],
    "versions": [
      {
        "version": "1da177e4c3f4",
        "lessThan": "66ec619e4591",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "a68e564adcaa",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/ceph/addr.c",
      "fs/ceph/caps.c",
      "fs/ceph/file.c",
      "fs/ceph/mds_client.c",
      "fs/ceph/snap.c",
      "fs/ceph/super.h"
    ],
    "versions": [
      {
        "version": "6.1.13",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.2",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]