gsd-2024-26752
Vulnerability from gsd
Modified
2024-02-20 06:02
Details
In the Linux kernel, the following vulnerability has been resolved: l2tp: pass correct message length to ip6_append_data l2tp_ip6_sendmsg needs to avoid accounting for the transport header twice when splicing more data into an already partially-occupied skbuff. To manage this, we check whether the skbuff contains data using skb_queue_empty when deciding how much data to append using ip6_append_data. However, the code which performed the calculation was incorrect: ulen = len + skb_queue_empty(&sk->sk_write_queue) ? transhdrlen : 0; ...due to C operator precedence, this ends up setting ulen to transhdrlen for messages with a non-zero length, which results in corrupted packets on the wire. Add parentheses to correct the calculation in line with the original intent.
Aliases



{
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2024-26752"
      ],
      "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nl2tp: pass correct message length to ip6_append_data\n\nl2tp_ip6_sendmsg needs to avoid accounting for the transport header\ntwice when splicing more data into an already partially-occupied skbuff.\n\nTo manage this, we check whether the skbuff contains data using\nskb_queue_empty when deciding how much data to append using\nip6_append_data.\n\nHowever, the code which performed the calculation was incorrect:\n\n     ulen = len + skb_queue_empty(\u0026sk-\u003esk_write_queue) ? transhdrlen : 0;\n\n...due to C operator precedence, this ends up setting ulen to\ntranshdrlen for messages with a non-zero length, which results in\ncorrupted packets on the wire.\n\nAdd parentheses to correct the calculation in line with the original\nintent.",
      "id": "GSD-2024-26752",
      "modified": "2024-02-20T06:02:29.206450Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@kernel.org",
        "ID": "CVE-2024-26752",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Linux",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_name": "559d697c5d07",
                          "version_value": "4c3ce64bc9d3"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "1fc793d68d50",
                          "version_value": "c1d3a84a67db"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "96b2e1090397",
                          "version_value": "dcb4d1426859"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "cd1189956393",
                          "version_value": "0da15a703951"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "f6a7182179c0",
                          "version_value": "13cd1daeea84"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "9d4c75800f61",
                          "version_value": "804bd8650a3a"
                        },
                        {
                          "version_value": "not down converted",
                          "x_cve_json_5_version_data": {
                            "defaultStatus": "affected",
                            "versions": [
                              {
                                "status": "affected",
                                "version": "6.6"
                              },
                              {
                                "lessThan": "6.6",
                                "status": "unaffected",
                                "version": "0",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "4.19.*",
                                "status": "unaffected",
                                "version": "4.19.308",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "5.4.*",
                                "status": "unaffected",
                                "version": "5.4.270",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "5.10.*",
                                "status": "unaffected",
                                "version": "5.10.211",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "5.15.*",
                                "status": "unaffected",
                                "version": "5.15.150",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "6.1.*",
                                "status": "unaffected",
                                "version": "6.1.80",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "6.6.*",
                                "status": "unaffected",
                                "version": "6.6.19",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "6.7.*",
                                "status": "unaffected",
                                "version": "6.7.7",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "*",
                                "status": "unaffected",
                                "version": "6.8",
                                "versionType": "original_commit_for_fix"
                              }
                            ]
                          }
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Linux"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nl2tp: pass correct message length to ip6_append_data\n\nl2tp_ip6_sendmsg needs to avoid accounting for the transport header\ntwice when splicing more data into an already partially-occupied skbuff.\n\nTo manage this, we check whether the skbuff contains data using\nskb_queue_empty when deciding how much data to append using\nip6_append_data.\n\nHowever, the code which performed the calculation was incorrect:\n\n     ulen = len + skb_queue_empty(\u0026sk-\u003esk_write_queue) ? transhdrlen : 0;\n\n...due to C operator precedence, this ends up setting ulen to\ntranshdrlen for messages with a non-zero length, which results in\ncorrupted packets on the wire.\n\nAdd parentheses to correct the calculation in line with the original\nintent."
          }
        ]
      },
      "generator": {
        "engine": "bippy-851b3ed3d212"
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "n/a"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://git.kernel.org/stable/c/4c3ce64bc9d36ca9164dd6c77ff144c121011aae",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/4c3ce64bc9d36ca9164dd6c77ff144c121011aae"
          },
          {
            "name": "https://git.kernel.org/stable/c/c1d3a84a67db910ce28a871273c992c3d7f9efb5",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/c1d3a84a67db910ce28a871273c992c3d7f9efb5"
          },
          {
            "name": "https://git.kernel.org/stable/c/dcb4d14268595065c85dc5528056713928e17243",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/dcb4d14268595065c85dc5528056713928e17243"
          },
          {
            "name": "https://git.kernel.org/stable/c/0da15a70395182ee8cb75716baf00dddc0bea38d",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/0da15a70395182ee8cb75716baf00dddc0bea38d"
          },
          {
            "name": "https://git.kernel.org/stable/c/13cd1daeea848614e585b2c6ecc11ca9c8ab2500",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/13cd1daeea848614e585b2c6ecc11ca9c8ab2500"
          },
          {
            "name": "https://git.kernel.org/stable/c/804bd8650a3a2bf3432375f8c97d5049d845ce56",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/804bd8650a3a2bf3432375f8c97d5049d845ce56"
          },
          {
            "name": "https://git.kernel.org/stable/c/83340c66b498e49353530e41542500fc8a4782d6",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/83340c66b498e49353530e41542500fc8a4782d6"
          },
          {
            "name": "https://git.kernel.org/stable/c/359e54a93ab43d32ee1bff3c2f9f10cb9f6b6e79",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/359e54a93ab43d32ee1bff3c2f9f10cb9f6b6e79"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "cve": {
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nl2tp: pass correct message length to ip6_append_data\n\nl2tp_ip6_sendmsg needs to avoid accounting for the transport header\ntwice when splicing more data into an already partially-occupied skbuff.\n\nTo manage this, we check whether the skbuff contains data using\nskb_queue_empty when deciding how much data to append using\nip6_append_data.\n\nHowever, the code which performed the calculation was incorrect:\n\n     ulen = len + skb_queue_empty(\u0026sk-\u003esk_write_queue) ? transhdrlen : 0;\n\n...due to C operator precedence, this ends up setting ulen to\ntranshdrlen for messages with a non-zero length, which results in\ncorrupted packets on the wire.\n\nAdd parentheses to correct the calculation in line with the original\nintent."
          }
        ],
        "id": "CVE-2024-26752",
        "lastModified": "2024-04-03T17:24:18.150",
        "metrics": {},
        "published": "2024-04-03T17:15:51.910",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/0da15a70395182ee8cb75716baf00dddc0bea38d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/13cd1daeea848614e585b2c6ecc11ca9c8ab2500"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/359e54a93ab43d32ee1bff3c2f9f10cb9f6b6e79"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/4c3ce64bc9d36ca9164dd6c77ff144c121011aae"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/804bd8650a3a2bf3432375f8c97d5049d845ce56"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/83340c66b498e49353530e41542500fc8a4782d6"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/c1d3a84a67db910ce28a871273c992c3d7f9efb5"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/dcb4d14268595065c85dc5528056713928e17243"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Awaiting Analysis"
      }
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading...

Loading...

Loading...

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.