CVE-2024-36270 netfilter: tproxy: bail out if IP has been disabled on the device

2024-06-2110:18:07

Linux

www.cve.org

linux kernel

netfilter

tproxy

vulnerability

fix

syzbot

kernel

kasan

rip

nf_tproxy_laddr4

nft_tproxy_eval

__in_dev_get_rcu

null

cve

0.0004 Low

EPSS

Percentile

10.4%

JSON

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

netfilter: tproxy: bail out if IP has been disabled on the device

syzbot reports:
general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
[…]
RIP: 0010:nf_tproxy_laddr4+0xb7/0x340 net/ipv4/netfilter/nf_tproxy_ipv4.c:62
Call Trace:
nft_tproxy_eval_v4 net/netfilter/nft_tproxy.c:56 [inline]
nft_tproxy_eval+0xa9a/0x1a00 net/netfilter/nft_tproxy.c:168

__in_dev_get_rcu() can return NULL, so check for this.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/ipv4/netfilter/nf_tproxy_ipv4.c"
    ],
    "versions": [
      {
        "version": "cc6eb4338569",
        "lessThan": "10f0af5234da",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cc6eb4338569",
        "lessThan": "07eeedafc59c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cc6eb4338569",
        "lessThan": "6fe5af4ff06d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cc6eb4338569",
        "lessThan": "caf3a8afb5ea",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cc6eb4338569",
        "lessThan": "570b4c52096e",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cc6eb4338569",
        "lessThan": "819bfeca16eb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cc6eb4338569",
        "lessThan": "21a673bddc8f",
        "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/netfilter/nf_tproxy_ipv4.c"
    ],
    "versions": [
      {
        "version": "2.6.37",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "2.6.37",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.278",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.219",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.161",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.93",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.33",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9.4",
        "lessThanOrEqual": "6.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10-rc2",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]