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netfilter: conntrack: Avoid nf_ct_helper_hash uses after free

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: Avoid nf_ct_helper_hash uses after free If nf_conntrack_init_start() fails (for example due to a register_nf_conntrack_bpf() failure), the nf_conntrack_helper_fini() clean-up path frees the nf_ct_helper_hash map. When built with NF_CONNTRACK=y, further netfilter modules (e.g: netfilter_conntrack_ftp) can still be loaded and call nf_conntrack_helpers_register(), independently of whether nf_conntrack initialized correctly. This accesses the nf_ct_helper_hash dangling pointer and causes a uaf, possibly leading to random memory corruption. This patch guards nf_conntrack_helper_register() from accessing a freed or uninitialized nf_ct_helper_hash pointer and fixes possible uses-after-free when loading a conntrack module.

Announced Source revision 1
Original source ↗

CVE-2023-53619

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2023-53619

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "12f7a505331e6b2754684b509f2ac8f0011ce644",
        "lessThan": "4ee69c91cb8f9ca144bc0861969e5a1a3c6152a7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "12f7a505331e6b2754684b509f2ac8f0011ce644",
        "lessThan": "00716f25f9697d02a0d9bd622575c7c7321ba3d0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "12f7a505331e6b2754684b509f2ac8f0011ce644",
        "lessThan": "61c7a5256543ae7d24cd9d21853d514c8632e1e9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "12f7a505331e6b2754684b509f2ac8f0011ce644",
        "lessThan": "8289d422f5e484efe4a565fe18e862ecd621c175",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "12f7a505331e6b2754684b509f2ac8f0011ce644",
        "lessThan": "6f03ce2f1abcb9f9d0511e3659ca6eb60e39f566",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "12f7a505331e6b2754684b509f2ac8f0011ce644",
        "lessThan": "05561f822f27b9fa88fa5504ddec34bf38833034",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "12f7a505331e6b2754684b509f2ac8f0011ce644",
        "lessThan": "fce5cc7cbd4b92f979bf02c9ec5fb69aaeba92d7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "12f7a505331e6b2754684b509f2ac8f0011ce644",
        "lessThan": "6eef7a2b933885a17679eb8ed0796ddf0ee5309b",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/netfilter/nf_conntrack_helper.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.6"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.6",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "4.14.322",
        "versionType": "semver",
        "lessThanOrEqual": "4.14.*"
      },
      {
        "status": "unaffected",
        "version": "4.19.291",
        "versionType": "semver",
        "lessThanOrEqual": "4.19.*"
      },
      {
        "status": "unaffected",
        "version": "5.4.251",
        "versionType": "semver",
        "lessThanOrEqual": "5.4.*"
      },
      {
        "status": "unaffected",
        "version": "5.10.188",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.121",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.39",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.4.4",
        "versionType": "semver",
        "lessThanOrEqual": "6.4.*"
      },
      {
        "status": "unaffected",
        "version": "6.5",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/netfilter/nf_conntrack_helper.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2023-53619

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#30294 · Revision 1
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Publisher date
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