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net: add more sanity checks to qdisc_pkt_len_init()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: net: add more sanity checks to qdisc_pkt_len_init() One path takes care of SKB_GSO_DODGY, assuming skb->len is bigger than hdr_len. virtio_net_hdr_to_skb() does not fully dissect TCP headers, it only make sure it is at least 20 bytes. It is possible for an user to provide a malicious 'GSO' packet, total length of 80 bytes. - 20 bytes of IPv4 header - 60 bytes TCP header - a small gso_size like 8 virtio_net_hdr_to_skb() would declare this packet as a normal GSO packet, because it would see 40 bytes of payload, bigger than gso_size. We need to make detect this case to not underflow qdisc_skb_cb(skb)->pkt_len.

Announced Source revision 1
Original source ↗

CVE-2024-49948

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-2024-49948

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": "1def9238d4aa2146924994aa4b7dc861f03b9362",
        "lessThan": "d7d1a28f5dd57b4d83def876f8d7b4403bd37df9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1def9238d4aa2146924994aa4b7dc861f03b9362",
        "lessThan": "473426a1d53a68dd1e718e6cd00d57936993fa6c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1def9238d4aa2146924994aa4b7dc861f03b9362",
        "lessThan": "566a931a1436d0e0ad13708ea55479b95426213c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1def9238d4aa2146924994aa4b7dc861f03b9362",
        "lessThan": "2415f465730e48b6e38da1c7c097317bf5dd2d20",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1def9238d4aa2146924994aa4b7dc861f03b9362",
        "lessThan": "27a8fabc54d2f960d47bdfbebf2bdc6e8a92a4c4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1def9238d4aa2146924994aa4b7dc861f03b9362",
        "lessThan": "9b0ee571d20a238a22722126abdfde61f1b2bdd0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1def9238d4aa2146924994aa4b7dc861f03b9362",
        "lessThan": "ff1c3cadcf405ab37dd91418a62a7acecf3bc5e2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1def9238d4aa2146924994aa4b7dc861f03b9362",
        "lessThan": "1eebe602a8d8264a12e35e39d0645fa88dbbacdd",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1def9238d4aa2146924994aa4b7dc861f03b9362",
        "lessThan": "ab9a9a9e9647392a19e7a885b08000e89c86b535",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/core/dev.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.9"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.9",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "4.19.323",
        "versionType": "semver",
        "lessThanOrEqual": "4.19.*"
      },
      {
        "status": "unaffected",
        "version": "5.4.285",
        "versionType": "semver",
        "lessThanOrEqual": "5.4.*"
      },
      {
        "status": "unaffected",
        "version": "5.10.227",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.168",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.113",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.55",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.10.14",
        "versionType": "semver",
        "lessThanOrEqual": "6.10.*"
      },
      {
        "status": "unaffected",
        "version": "6.11.3",
        "versionType": "semver",
        "lessThanOrEqual": "6.11.*"
      },
      {
        "status": "unaffected",
        "version": "6.12",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/core/dev.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2024-49948

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#26757 · Revision 1
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Publisher date
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