cvelistv5 - cve-2023-3603

▼	URL	Tags
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2023-3603	Third Party Advisory
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2221791	Issue Tracking, Third Party Advisory

▼	Vendor	Product
	n/a	libssh
	Red Hat	Red Hat Enterprise Linux 7
	Red Hat	Red Hat Enterprise Linux 8
	Red Hat	Red Hat Enterprise Linux 9
	Fedora	Extra Packages for Enterprise Linux 7
	Fedora	Fedora

wid-sec-w-2023-1703

Vulnerability from csaf_certbund

Published

2023-07-10 22:00

Modified

2023-07-10 22:00

Summary

libssh: Schwachstelle ermöglicht Denial of Service

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung

libssh ist eine C Bibliothek für das Anbieten von SSH Diensten auf Client- und Serverseite. Sie kann genutzt werden, um aus der Ferne Programme auszuführen, Dateien zu übertragen oder als sicherer und transparenter Tunnel für entfernte Programme genutzt werden.

Angriff

Ein entfernter Angreifer kann eine Schwachstelle in libssh stfp Server ausnutzen, um einen Denial of Service Zustand zu erzeugen.

Betroffene Betriebssysteme

- Linux

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "libssh ist eine C Bibliothek f\u00fcr das Anbieten von SSH Diensten auf Client- und Serverseite. Sie kann genutzt werden, um aus der Ferne Programme auszuf\u00fchren, Dateien zu \u00fcbertragen oder als sicherer und transparenter Tunnel f\u00fcr entfernte Programme genutzt werden.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter Angreifer kann eine Schwachstelle in libssh stfp Server ausnutzen, um einen Denial of Service Zustand zu erzeugen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2023-1703 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2023/wid-sec-w-2023-1703.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2023-1703 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2023-1703"
      },
      {
        "category": "external",
        "summary": "Red Hat Bugzilla \u2013 Bug 2221791 vom 2023-07-10",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2221791"
      }
    ],
    "source_lang": "en-US",
    "title": "libssh: Schwachstelle erm\u00f6glicht Denial of Service",
    "tracking": {
      "current_release_date": "2023-07-10T22:00:00.000+00:00",
      "generator": {
        "date": "2024-02-15T17:35:53.141+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.0"
        }
      },
      "id": "WID-SEC-W-2023-1703",
      "initial_release_date": "2023-07-10T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2023-07-10T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Open Source libssh",
            "product": {
              "name": "Open Source libssh",
              "product_id": "T028500",
              "product_identification_helper": {
                "cpe": "cpe:/a:libssh:libssh:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2023-3603",
      "notes": [
        {
          "category": "description",
          "text": "Es besteht eine Schwachstelle in libssh in der stfp server Komponente aufgrund einer fehlenden Zuordnungspr\u00fcfung. Ein entfernter Angreifer kann diese Schwachstelle ausnutzen, um einen Denial-of-Service-Zustand zu verursachen."
        }
      ],
      "product_status": {
        "known_affected": [
          "T028500"
        ]
      },
      "release_date": "2023-07-10T22:00:00Z",
      "title": "CVE-2023-3603"
    }
  ]
}

gsd-2023-3603

Vulnerability from gsd

Modified

2023-12-13 01:20

Details

A missing allocation check in sftp server processing read requests may cause a NULL dereference on low-memory conditions. The malicious client can request up to 4GB SFTP reads, causing allocation of up to 4GB buffers, which was not being checked for failure. This will likely crash the authenticated user's sftp server connection (if implemented as forking as recommended). For thread-based servers, this might also cause DoS for legitimate users. Given this code is not in any released versions, no security releases have been issued.

Aliases

CVE-2023-3603

Aliases

CVE-2023-3603

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2023-3603",
    "id": "GSD-2023-3603"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2023-3603"
      ],
      "details": "A missing allocation check in sftp server processing read requests may cause a NULL dereference on low-memory conditions. The malicious client can request up to 4GB SFTP reads, causing allocation of up to 4GB buffers, which was not being checked for failure. This will likely crash the authenticated user\u0027s sftp server connection (if implemented as forking as recommended). For thread-based servers, this might also cause DoS for legitimate users.\r\n\r\nGiven this code is not in any released versions, no security releases have been issued.",
      "id": "GSD-2023-3603",
      "modified": "2023-12-13T01:20:54.704884Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "secalert@redhat.com",
        "ID": "CVE-2023-3603",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "libssh",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "not down converted",
                          "x_cve_json_5_version_data": {
                            "defaultStatus": "affected"
                          }
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "n/a"
            },
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Red Hat Enterprise Linux 7",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "not down converted",
                          "x_cve_json_5_version_data": {
                            "defaultStatus": "unaffected"
                          }
                        }
                      ]
                    }
                  },
                  {
                    "product_name": "Red Hat Enterprise Linux 8",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "not down converted",
                          "x_cve_json_5_version_data": {
                            "defaultStatus": "unaffected"
                          }
                        }
                      ]
                    }
                  },
                  {
                    "product_name": "Red Hat Enterprise Linux 9",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "not down converted",
                          "x_cve_json_5_version_data": {
                            "defaultStatus": "unaffected"
                          }
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Red Hat"
            },
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Extra Packages for Enterprise Linux 7",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "not down converted",
                          "x_cve_json_5_version_data": {
                            "defaultStatus": "unaffected"
                          }
                        }
                      ]
                    }
                  },
                  {
                    "product_name": "Fedora",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "not down converted",
                          "x_cve_json_5_version_data": {
                            "defaultStatus": "unaffected"
                          }
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Fedora"
            }
          ]
        }
      },
      "credits": [
        {
          "lang": "en",
          "value": "Upstream acknowledges Wei Chong Tan as the original reporter."
        }
      ],
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "A missing allocation check in sftp server processing read requests may cause a NULL dereference on low-memory conditions. The malicious client can request up to 4GB SFTP reads, causing allocation of up to 4GB buffers, which was not being checked for failure. This will likely crash the authenticated user\u0027s sftp server connection (if implemented as forking as recommended). For thread-based servers, this might also cause DoS for legitimate users.\r\n\r\nGiven this code is not in any released versions, no security releases have been issued."
          }
        ]
      },
      "impact": {
        "cvss": [
          {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 3.1,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "cweId": "CWE-476",
                "lang": "eng",
                "value": "NULL Pointer Dereference"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://access.redhat.com/security/cve/CVE-2023-3603",
            "refsource": "MISC",
            "url": "https://access.redhat.com/security/cve/CVE-2023-3603"
          },
          {
            "name": "https://bugzilla.redhat.com/show_bug.cgi?id=2221791",
            "refsource": "MISC",
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2221791"
          }
        ]
      },
      "work_around": [
        {
          "lang": "en",
          "value": "The SFTP server implementation is based on callbacks so you can rewrite the sftp_channel_default_data_callback() to provide additional checks.\n\n[1] https://gitlab.com/libssh/libssh-mirror/-/blob/master/examples/sample_sftpserver.c#L330"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:libssh:libssh:-:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "secalert@redhat.com",
          "ID": "CVE-2023-3603"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "A missing allocation check in sftp server processing read requests may cause a NULL dereference on low-memory conditions. The malicious client can request up to 4GB SFTP reads, causing allocation of up to 4GB buffers, which was not being checked for failure. This will likely crash the authenticated user\u0027s sftp server connection (if implemented as forking as recommended). For thread-based servers, this might also cause DoS for legitimate users.\r\n\r\nGiven this code is not in any released versions, no security releases have been issued."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-770"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://bugzilla.redhat.com/show_bug.cgi?id=2221791",
              "refsource": "MISC",
              "tags": [
                "Issue Tracking",
                "Third Party Advisory"
              ],
              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2221791"
            },
            {
              "name": "https://access.redhat.com/security/cve/CVE-2023-3603",
              "refsource": "MISC",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://access.redhat.com/security/cve/CVE-2023-3603"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2023-08-01T14:44Z",
      "publishedDate": "2023-07-21T20:15Z"
    }
  }
}

ghsa-2c4f-vgwr-82q6

Vulnerability from github

Published

2023-07-21 21:30

Modified

2024-04-04 06:18

Severity ?

3.1 (Low) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

Details

A missing allocation check in sftp server processing read requests may cause a NULL dereference on low-memory conditions. The malicious client can request up to 4GB SFTP reads, causing allocation of up to 4GB buffers, which was not being checked for failure. This will likely crash the authenticated user's sftp server connection (if implemented as forking as recommended). For thread-based servers, this might also cause DoS for legitimate users.

Given this code is not in any released versions, no security releases have been issued.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2023-3603"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476",
      "CWE-770"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-07-21T20:15:16Z",
    "severity": "MODERATE"
  },
  "details": "A missing allocation check in sftp server processing read requests may cause a NULL dereference on low-memory conditions. The malicious client can request up to 4GB SFTP reads, causing allocation of up to 4GB buffers, which was not being checked for failure. This will likely crash the authenticated user\u0027s sftp server connection (if implemented as forking as recommended). For thread-based servers, this might also cause DoS for legitimate users.\n\nGiven this code is not in any released versions, no security releases have been issued.",
  "id": "GHSA-2c4f-vgwr-82q6",
  "modified": "2024-04-04T06:18:44Z",
  "published": "2023-07-21T21:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-3603"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2023-3603"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2221791"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}

cve-2023-3603

Vulnerability from cvelistv5

Tags

Sightings

Nomenclature

Action not permitted

cve-2023-3603

Vulnerability from cvelistv5

wid-sec-w-2023-1703

Vulnerability from csaf_certbund

gsd-2023-3603

Vulnerability from gsd

ghsa-2c4f-vgwr-82q6

Vulnerability from github

Tags

Sightings

Nomenclature