CVE-2024-36017 rtnetlink: Correct nested IFLA_VF_VLAN_LIST attribute validation

2024-05-3012:52:03

Linux

github.com

linux kernel

vulnerability

rtnetlink

attribute

validation

struct ifla_vf_vlan_info

size

do_setvfinfo

nla_hdrlen

out of bands

read access

6.7 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

13.0%

JSON

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

rtnetlink: Correct nested IFLA_VF_VLAN_LIST attribute validation

Each attribute inside a nested IFLA_VF_VLAN_LIST is assumed to be a
struct ifla_vf_vlan_info so the size of such attribute needs to be at least
of sizeof(struct ifla_vf_vlan_info) which is 14 bytes.
The current size validation in do_setvfinfo is against NLA_HDRLEN (4 bytes)
which is less than sizeof(struct ifla_vf_vlan_info) so this validation
is not enough and a too small attribute might be cast to a
struct ifla_vf_vlan_info, this might result in an out of bands
read access when accessing the saved (casted) entry in ivvl.

CNA Affected

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "79aab093a0b5",
        "lessThan": "8ac69ff2d0d5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "79aab093a0b5",
        "lessThan": "5e7ef2d88666",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "79aab093a0b5",
        "lessThan": "6c8f44b02500",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "79aab093a0b5",
        "lessThan": "f3c1bf3054f9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "79aab093a0b5",
        "lessThan": "6e4c7193954f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "79aab093a0b5",
        "lessThan": "206003c748b8",
        "versionType": "git"
      },
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        "status": "affected",
        "version": "79aab093a0b5",
        "lessThan": "4a4b9757789a",
        "versionType": "git"
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      {
        "status": "affected",
        "version": "79aab093a0b5",
        "lessThan": "1aec77b2bb2e",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/core/rtnetlink.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.9"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.9",
        "versionType": "custom"
      },
      {
        "status": "unaffected",
        "version": "4.19.314",
        "versionType": "custom",
        "lessThanOrEqual": "4.19.*"
      },
      {
        "status": "unaffected",
        "version": "5.4.276",
        "versionType": "custom",
        "lessThanOrEqual": "5.4.*"
      },
      {
        "status": "unaffected",
        "version": "5.10.217",
        "versionType": "custom",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.159",
        "versionType": "custom",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.91",
        "versionType": "custom",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.31",
        "versionType": "custom",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.8.10",
        "versionType": "custom",
        "lessThanOrEqual": "6.8.*"
      },
      {
        "status": "unaffected",
        "version": "6.9",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/core/rtnetlink.c"
    ],
    "defaultStatus": "affected"
  }
]