CVE-2024-36934 bna: ensure the copied buf is NUL terminated

2024-05-3015:29:24

Linux

www.cve.org

linux kernel

vulnerability

buffer security

7.3 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

13.2%

JSON

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

bna: ensure the copied buf is NUL terminated

Currently, we allocate a nbytes-sized kernel buffer and copy nbytes from
userspace to that buffer. Later, we use sscanf on this buffer but we don’t
ensure that the string is terminated inside the buffer, this can lead to
OOB read when using sscanf. Fix this issue by using memdup_user_nul
instead of memdup_user.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/ethernet/brocade/bna/bnad_debugfs.c"
    ],
    "versions": [
      {
        "version": "7afc5dbde091",
        "lessThan": "bd502ba81cd1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7afc5dbde091",
        "lessThan": "80578ec10335",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7afc5dbde091",
        "lessThan": "6f0f19b79c08",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7afc5dbde091",
        "lessThan": "0f560240b4cc",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7afc5dbde091",
        "lessThan": "06cb37e2ba64",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7afc5dbde091",
        "lessThan": "e19478763154",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7afc5dbde091",
        "lessThan": "1518b2b498a0",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7afc5dbde091",
        "lessThan": "8c34096c7fdf",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/ethernet/brocade/bna/bnad_debugfs.c"
    ],
    "versions": [
      {
        "version": "3.3",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.3",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.314",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.276",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.217",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.159",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.91",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.31",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8.10",
        "lessThanOrEqual": "6.8.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]