gsd-2023-52633
Vulnerability from gsd
Modified
2024-03-07 06:01
Details
In the Linux kernel, the following vulnerability has been resolved: um: time-travel: fix time corruption In 'basic' time-travel mode (without =inf-cpu or =ext), we still get timer interrupts. These can happen at arbitrary points in time, i.e. while in timer_read(), which pushes time forward just a little bit. Then, if we happen to get the interrupt after calculating the new time to push to, but before actually finishing that, the interrupt will set the time to a value that's incompatible with the forward, and we'll crash because time goes backwards when we do the forwarding. Fix this by reading the time_travel_time, calculating the adjustment, and doing the adjustment all with interrupts disabled.
Aliases


To clipboard 

{
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2023-52633"
      ],
      "details": "In the Linux kernel, the following vulnerability has been resolved:\n\num: time-travel: fix time corruption\n\nIn \u0027basic\u0027 time-travel mode (without =inf-cpu or =ext), we\nstill get timer interrupts. These can happen at arbitrary\npoints in time, i.e. while in timer_read(), which pushes\ntime forward just a little bit. Then, if we happen to get\nthe interrupt after calculating the new time to push to,\nbut before actually finishing that, the interrupt will set\nthe time to a value that\u0027s incompatible with the forward,\nand we\u0027ll crash because time goes backwards when we do the\nforwarding.\n\nFix this by reading the time_travel_time, calculating the\nadjustment, and doing the adjustment all with interrupts\ndisabled.",
      "id": "GSD-2023-52633",
      "modified": "2024-03-07T06:01:45.481777Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@kernel.org",
        "ID": "CVE-2023-52633",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Linux",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_name": "1da177e4c3f4",
                          "version_value": "0c7478a2da3f"
                        },
                        {
                          "version_value": "not down converted",
                          "x_cve_json_5_version_data": {
                            "defaultStatus": "affected",
                            "versions": [
                              {
                                "lessThanOrEqual": "5.15.*",
                                "status": "unaffected",
                                "version": "5.15.149",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "6.1.*",
                                "status": "unaffected",
                                "version": "6.1.77",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "6.6.*",
                                "status": "unaffected",
                                "version": "6.6.16",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "6.7.*",
                                "status": "unaffected",
                                "version": "6.7.4",
                                "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\num: time-travel: fix time corruption\n\nIn \u0027basic\u0027 time-travel mode (without =inf-cpu or =ext), we\nstill get timer interrupts. These can happen at arbitrary\npoints in time, i.e. while in timer_read(), which pushes\ntime forward just a little bit. Then, if we happen to get\nthe interrupt after calculating the new time to push to,\nbut before actually finishing that, the interrupt will set\nthe time to a value that\u0027s incompatible with the forward,\nand we\u0027ll crash because time goes backwards when we do the\nforwarding.\n\nFix this by reading the time_travel_time, calculating the\nadjustment, and doing the adjustment all with interrupts\ndisabled."
          }
        ]
      },
      "generator": {
        "engine": "bippy-b4257b672505"
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "n/a"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://git.kernel.org/stable/c/0c7478a2da3f5fe106b4658338873d50c86ac7ab",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/0c7478a2da3f5fe106b4658338873d50c86ac7ab"
          },
          {
            "name": "https://git.kernel.org/stable/c/4f7dad73df4cdb2b7042103d3922745d040ad025",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/4f7dad73df4cdb2b7042103d3922745d040ad025"
          },
          {
            "name": "https://git.kernel.org/stable/c/de3e9d8e8d1ae0a4d301109d1ec140796901306c",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/de3e9d8e8d1ae0a4d301109d1ec140796901306c"
          },
          {
            "name": "https://git.kernel.org/stable/c/b427f55e9d4185f6f17cc1e3296eb8d0c4425283",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/b427f55e9d4185f6f17cc1e3296eb8d0c4425283"
          },
          {
            "name": "https://git.kernel.org/stable/c/abe4eaa8618bb36c2b33e9cdde0499296a23448c",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/abe4eaa8618bb36c2b33e9cdde0499296a23448c"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "cve": {
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\num: time-travel: fix time corruption\n\nIn \u0027basic\u0027 time-travel mode (without =inf-cpu or =ext), we\nstill get timer interrupts. These can happen at arbitrary\npoints in time, i.e. while in timer_read(), which pushes\ntime forward just a little bit. Then, if we happen to get\nthe interrupt after calculating the new time to push to,\nbut before actually finishing that, the interrupt will set\nthe time to a value that\u0027s incompatible with the forward,\nand we\u0027ll crash because time goes backwards when we do the\nforwarding.\n\nFix this by reading the time_travel_time, calculating the\nadjustment, and doing the adjustment all with interrupts\ndisabled."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: um: viaje en el tiempo: corrige la corrupci\u00f3n del tiempo En el modo de viaje en el tiempo \u0027b\u00e1sico\u0027 (sin =inf-cpu o =ext), todav\u00eda obtenemos interrupciones del temporizador. Esto puede suceder en momentos arbitrarios en el tiempo, es decir, mientras est\u00e1 en timer_read(), lo que adelanta un poco el tiempo. Luego, si recibimos la interrupci\u00f3n despu\u00e9s de calcular el nuevo tiempo al que enviar, pero antes de finalizarlo, la interrupci\u00f3n establecer\u00e1 el tiempo en un valor que es incompatible con el avance, y fallaremos porque el tiempo retrocede cuando hacer el reenv\u00edo. Solucione este problema leyendo time_travel_time, calculando el ajuste y realizando el ajuste, todo con las interrupciones desactivadas."
          }
        ],
        "id": "CVE-2023-52633",
        "lastModified": "2024-04-02T12:50:42.233",
        "metrics": {},
        "published": "2024-04-02T07:15:41.097",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/0c7478a2da3f5fe106b4658338873d50c86ac7ab"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/4f7dad73df4cdb2b7042103d3922745d040ad025"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/abe4eaa8618bb36c2b33e9cdde0499296a23448c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/b427f55e9d4185f6f17cc1e3296eb8d0c4425283"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/de3e9d8e8d1ae0a4d301109d1ec140796901306c"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Awaiting Analysis"
      }
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.