CVE-2023-52442 ksmbd: validate session id and tree id in compound request

2024-02-2107:21:01

Linux

www.cve.org

linux kernel

vulnerability resolution

ksmbd

compound request

smb2_get_msg

smb2_get_ksmbd_tcon

smb2_check_user_session

smb2_tree_connect_he

ksmbd_req_buf_next

9.5 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

16.1%

JSON

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

ksmbd: validate session id and tree id in compound request

smb2_get_msg() in smb2_get_ksmbd_tcon() and smb2_check_user_session()
will always return the first request smb2 header in a compound request.
if SMB2_TREE_CONNECT_HE is the first command in compound request, will
return 0, i.e. The tree id check is skipped.
This patch use ksmbd_req_buf_next() to get current command in compound.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/smb/server/smb2pdu.c"
    ],
    "versions": [
      {
        "version": "1da177e4c3f4",
        "lessThan": "017d85c94f02",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "becb5191d1d5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "4c2b350b2e26",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "3df0411e132e",
        "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/smb/server/smb2pdu.c"
    ],
    "versions": [
      {
        "version": "5.15.145",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.53",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.4.16",
        "lessThanOrEqual": "6.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.5",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]