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LinuxCVE-2024-42283

HistoryAug 17, 2024 - 9:15 a.m.

CVE-2024-42283

2024-08-1709:15:09

CWE-908

Linux

web.nvd.nist.gov

linux kernel

vulnerability

nexthop

struct nexthop_grp

nla_put_nh_group

strace

recvmsg

memory leak

kernel memory

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

AI Score

6.5

Confidence

Low

EPSS

Percentile

5.0%

JSON

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

net: nexthop: Initialize all fields in dumped nexthops

struct nexthop_grp contains two reserved fields that are not initialized by
nla_put_nh_group(), and carry garbage. This can be observed e.g. with
strace (edited for clarity):

# ip nexthop add id 1 dev lo
# ip nexthop add id 101 group 1
# strace -e recvmsg ip nexthop get id 101
...
recvmsg(... [{nla_len=12, nla_type=NHA_GROUP},
             [{id=1, weight=0, resvd1=0x69, resvd2=0x67}]] ...) = 52

The fields are reserved and therefore not currently used. But as they are, they
leak kernel memory, and the fact they are not just zero complicates repurposing
of the fields for new ends. Initialize the full structure.

Affected configurations

Nvd

Vulners

Node

linuxlinux_kernelRange5.3–5.4.282

linuxlinux_kernelRange5.5–5.10.224

linuxlinux_kernelRange5.11–5.15.165

linuxlinux_kernelRange5.16–6.1.103

linuxlinux_kernelRange6.2–6.6.44

linuxlinux_kernelRange6.7–6.10.3

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/ipv4/nexthop.c"
    ],
    "versions": [
      {
        "version": "430a049190de",
        "lessThan": "fd06cb4a5fc7",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "430a049190de",
        "lessThan": "5cc4d71dda2d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "430a049190de",
        "lessThan": "9e8f558a3afe",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "430a049190de",
        "lessThan": "1377de719652",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "430a049190de",
        "lessThan": "7704460acd7f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "430a049190de",
        "lessThan": "a13d3864b76a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "430a049190de",
        "lessThan": "6d745cd0e972",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/ipv4/nexthop.c"
    ],
    "versions": [
      {
        "version": "5.3",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.3",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.282",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.224",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.165",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.103",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.44",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10.3",
        "lessThanOrEqual": "6.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.11",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]