cve-2024-49948
Vulnerability from cvelistv5
Published
2024-10-21 18:02
Modified
2024-12-19 09:29
Severity ?
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1eebe602a8d8264a12e35e39d0645fa88dbbacddPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2415f465730e48b6e38da1c7c097317bf5dd2d20Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/27a8fabc54d2f960d47bdfbebf2bdc6e8a92a4c4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/473426a1d53a68dd1e718e6cd00d57936993fa6cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/566a931a1436d0e0ad13708ea55479b95426213cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9b0ee571d20a238a22722126abdfde61f1b2bdd0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ab9a9a9e9647392a19e7a885b08000e89c86b535Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d7d1a28f5dd57b4d83def876f8d7b4403bd37df9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ff1c3cadcf405ab37dd91418a62a7acecf3bc5e2Patch
Impacted products
Vendor Product Version
Linux Linux Version: 1def9238d4aa2146924994aa4b7dc861f03b9362
Version: 1def9238d4aa2146924994aa4b7dc861f03b9362
Version: 1def9238d4aa2146924994aa4b7dc861f03b9362
Version: 1def9238d4aa2146924994aa4b7dc861f03b9362
Version: 1def9238d4aa2146924994aa4b7dc861f03b9362
Version: 1def9238d4aa2146924994aa4b7dc861f03b9362
Version: 1def9238d4aa2146924994aa4b7dc861f03b9362
Version: 1def9238d4aa2146924994aa4b7dc861f03b9362
Version: 1def9238d4aa2146924994aa4b7dc861f03b9362
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\"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\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/d7d1a28f5dd57b4d83def876f8d7b4403bd37df9\"}, {\"url\": \"https://git.kernel.org/stable/c/473426a1d53a68dd1e718e6cd00d57936993fa6c\"}, {\"url\": \"https://git.kernel.org/stable/c/566a931a1436d0e0ad13708ea55479b95426213c\"}, {\"url\": \"https://git.kernel.org/stable/c/2415f465730e48b6e38da1c7c097317bf5dd2d20\"}, {\"url\": \"https://git.kernel.org/stable/c/27a8fabc54d2f960d47bdfbebf2bdc6e8a92a4c4\"}, {\"url\": \"https://git.kernel.org/stable/c/9b0ee571d20a238a22722126abdfde61f1b2bdd0\"}, {\"url\": \"https://git.kernel.org/stable/c/ff1c3cadcf405ab37dd91418a62a7acecf3bc5e2\"}, {\"url\": \"https://git.kernel.org/stable/c/1eebe602a8d8264a12e35e39d0645fa88dbbacdd\"}, {\"url\": \"https://git.kernel.org/stable/c/ab9a9a9e9647392a19e7a885b08000e89c86b535\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: add more sanity checks to qdisc_pkt_len_init()\\n\\nOne path takes care of SKB_GSO_DODGY, assuming\\nskb-\u003elen is bigger than hdr_len.\\n\\nvirtio_net_hdr_to_skb() does not fully dissect TCP headers,\\nit only make sure it is at least 20 bytes.\\n\\nIt is possible for an user to provide a malicious \u0027GSO\u0027 packet,\\ntotal length of 80 bytes.\\n\\n- 20 bytes of IPv4 header\\n- 60 bytes TCP header\\n- a small gso_size like 8\\n\\nvirtio_net_hdr_to_skb() would declare this packet as a normal\\nGSO packet, because it would see 40 bytes of payload,\\nbigger than gso_size.\\n\\nWe need to make detect this case to not underflow\\nqdisc_skb_cb(skb)-\u003epkt_len.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T09:29:55.468Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-49948\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T09:29:55.468Z\", \"dateReserved\": \"2024-10-21T12:17:06.045Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-10-21T18:02:05.121Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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