CVE-2024-42269 netfilter: iptables: Fix potential null-ptr-deref in ip6table_nat_table_init().

2024-08-1708:54:24

Linux

www.cve.org

linux kernel vulnerability resolved iptables netfilter ip6table_nat_table_init() register_pernet_subsys() xt_register_template()

EPSS

Percentile

5.0%

JSON

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

netfilter: iptables: Fix potential null-ptr-deref in ip6table_nat_table_init().

ip6table_nat_table_init() accesses net->gen->ptr[ip6table_nat_net_ops.id],
but the function is exposed to user space before the entry is allocated
via register_pernet_subsys().

Let’s call register_pernet_subsys() before xt_register_template().

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/ipv6/netfilter/ip6table_nat.c"
    ],
    "versions": [
      {
        "version": "fdacd57c79b7",
        "lessThan": "419ee6274c51",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "fdacd57c79b7",
        "lessThan": "91b6df6611b7",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "fdacd57c79b7",
        "lessThan": "e85b9b6a87be",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "fdacd57c79b7",
        "lessThan": "87dba44e9471",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "fdacd57c79b7",
        "lessThan": "c22921df777d",
        "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/ipv6/netfilter/ip6table_nat.c"
    ],
    "versions": [
      {
        "version": "5.15",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.15",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.165",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.104",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.45",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10.4",
        "lessThanOrEqual": "6.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.11",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]