CVE-2009-1897 (GCVE-0-2009-1897)

Vulnerability from cvelistv5 – Published: 2009-07-20 17:00 – Updated: 2024-08-07 05:27
VLAI
Summary
The tun_chr_poll function in drivers/net/tun.c in the tun subsystem in the Linux kernel 2.6.30 and 2.6.30.1, when the -fno-delete-null-pointer-checks gcc option is omitted, allows local users to gain privileges via vectors involving a NULL pointer dereference and an mmap of /dev/net/tun, a different vulnerability than CVE-2009-1894.
Severity
No CVSS data available.
CWE
  • n/a
Assigner
redhat CNA under the redhat root
CNA scorecard B 81/100 over 1001 records in the last 180 days details
References
Date Public
2009-07-16 00:00
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-07T05:27:54.800Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "ADV-2009-1925",
            "tags": [
              "vdb-entry",
              "x_refsource_VUPEN",
              "x_transferred"
            ],
            "url": "http://www.vupen.com/english/advisories/2009/1925"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://isc.sans.org/diary.html?storyid=6820"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://grsecurity.net/~spender/cheddar_bay.tgz"
          },
          {
            "name": "[oss-security] 20090717 Linux 2.6.30+/SELinux/RHEL5 test kernel 0day, exploiting the unexploitable",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2009/07/17/1"
          },
          {
            "name": "20090716 Re: Linux 2.6.30+/SELinux/RHEL5 test kernel 0day, exploiting the unexploitable",
            "tags": [
              "mailing-list",
              "x_refsource_FULLDISC",
              "x_transferred"
            ],
            "url": "http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0246.html"
          },
          {
            "name": "linux-kernel-tunchrpoll-code-execution(51803)",
            "tags": [
              "vdb-entry",
              "x_refsource_XF",
              "x_transferred"
            ],
            "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/51803"
          },
          {
            "name": "[netdev] 20090409 Oops in tun: bisected to Limit amount of queued packets per device",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://article.gmane.org/gmane.linux.network/124939"
          },
          {
            "name": "35839",
            "tags": [
              "third-party-advisory",
              "x_refsource_SECUNIA",
              "x_transferred"
            ],
            "url": "http://secunia.com/advisories/35839"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=3c8a9c63d5fd738c261bd0ceece04d9c8357ca13"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=512284"
          },
          {
            "name": "[linux-kernel] 20090706 Re: PROBLEM: tun/tap crashes if open() /dev/net/tun and then poll() it.",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://lkml.org/lkml/2009/7/6/19"
          },
          {
            "name": "20090716 Linux 2.6.30+/SELinux/RHEL5 test kernel 0day, exploiting the unexploitable",
            "tags": [
              "mailing-list",
              "x_refsource_FULLDISC",
              "x_transferred"
            ],
            "url": "http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0241.html"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.redhat.com/en/blog/security-flaws-caused-compiler-optimizations"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "datePublic": "2009-07-16T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The tun_chr_poll function in drivers/net/tun.c in the tun subsystem in the Linux kernel 2.6.30 and 2.6.30.1, when the -fno-delete-null-pointer-checks gcc option is omitted, allows local users to gain privileges via vectors involving a NULL pointer dereference and an mmap of /dev/net/tun, a different vulnerability than CVE-2009-1894."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2019-08-21T18:05:42.000Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "name": "ADV-2009-1925",
          "tags": [
            "vdb-entry",
            "x_refsource_VUPEN"
          ],
          "url": "http://www.vupen.com/english/advisories/2009/1925"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://isc.sans.org/diary.html?storyid=6820"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://grsecurity.net/~spender/cheddar_bay.tgz"
        },
        {
          "name": "[oss-security] 20090717 Linux 2.6.30+/SELinux/RHEL5 test kernel 0day, exploiting the unexploitable",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2009/07/17/1"
        },
        {
          "name": "20090716 Re: Linux 2.6.30+/SELinux/RHEL5 test kernel 0day, exploiting the unexploitable",
          "tags": [
            "mailing-list",
            "x_refsource_FULLDISC"
          ],
          "url": "http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0246.html"
        },
        {
          "name": "linux-kernel-tunchrpoll-code-execution(51803)",
          "tags": [
            "vdb-entry",
            "x_refsource_XF"
          ],
          "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/51803"
        },
        {
          "name": "[netdev] 20090409 Oops in tun: bisected to Limit amount of queued packets per device",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://article.gmane.org/gmane.linux.network/124939"
        },
        {
          "name": "35839",
          "tags": [
            "third-party-advisory",
            "x_refsource_SECUNIA"
          ],
          "url": "http://secunia.com/advisories/35839"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=3c8a9c63d5fd738c261bd0ceece04d9c8357ca13"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=512284"
        },
        {
          "name": "[linux-kernel] 20090706 Re: PROBLEM: tun/tap crashes if open() /dev/net/tun and then poll() it.",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://lkml.org/lkml/2009/7/6/19"
        },
        {
          "name": "20090716 Linux 2.6.30+/SELinux/RHEL5 test kernel 0day, exploiting the unexploitable",
          "tags": [
            "mailing-list",
            "x_refsource_FULLDISC"
          ],
          "url": "http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0241.html"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.redhat.com/en/blog/security-flaws-caused-compiler-optimizations"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2009-1897",
    "datePublished": "2009-07-20T17:00:00.000Z",
    "dateReserved": "2009-06-02T00:00:00.000Z",
    "dateUpdated": "2024-08-07T05:27:54.800Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2009-1897",
      "date": "2026-10-14",
      "epss": "0.01521",
      "percentile": "0.74083"
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.30:*:*:*:*:*:*:*",
                    "matchCriteriaId": "10E55450-F6D9-483C-9CC8-E651E5A12AB1",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.30:rc1:*:*:*:*:*:*",
                    "matchCriteriaId": "45273823-29EA-44DE-8444-3933402C5793",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.30:rc2:*:*:*:*:*:*",
                    "matchCriteriaId": "88F60E74-09DB-4D4A-B922-4A46EED0EC20",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.30:rc3:*:*:*:*:*:*",
                    "matchCriteriaId": "E242D3DE-D1DC-406A-BCC3-C4380B7EC369",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.30:rc4:x86_32:*:*:*:*:*",
                    "matchCriteriaId": "06EFB3F7-2EAE-4A56-A9A1-E8C734E6B91E",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.30:rc5:*:*:*:*:*:*",
                    "matchCriteriaId": "8598D6E5-0C5C-4A31-841A-C12801DB7D91",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.30:rc6:*:*:*:*:*:*",
                    "matchCriteriaId": "59800B0A-477B-42F8-A58A-5144F455AE01",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.30:rc7-git6:*:*:*:*:*:*",
                    "matchCriteriaId": "F166BF6B-BFB0-4206-BD59-179701572F1C",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.30.1:*:*:*:*:*:*:*",
                    "matchCriteriaId": "99AC6D46-A0BF-4F1D-88BB-03BF74FDB84F",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "The tun_chr_poll function in drivers/net/tun.c in the tun subsystem in the Linux kernel 2.6.30 and 2.6.30.1, when the -fno-delete-null-pointer-checks gcc option is omitted, allows local users to gain privileges via vectors involving a NULL pointer dereference and an mmap of /dev/net/tun, a different vulnerability than CVE-2009-1894."
          },
          {
            "lang": "es",
            "value": "La funci\u00f3n tun_chr_poll en drivers/net/tun.c en el subsistema tun del kernel de Linux v2.6.30 y v2.6.30.1, cuando se omite la opci\u00f3n -fno-delete-null-pointer-checks en gcc, permite a atacantes locales obtener privilegios a trav\u00e9s de vectores que implican desreferenciacion de punteros NULL y un nmap de /dev/net/tun, es una vulnerabilidad diferente a CVE-2009-1894."
          }
        ],
        "id": "CVE-2009-1897",
        "lastModified": "2026-04-23T00:35:47.467",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "MEDIUM",
                "accessVector": "LOCAL",
                "authentication": "NONE",
                "availabilityImpact": "COMPLETE",
                "baseScore": 6.9,
                "confidentialityImpact": "COMPLETE",
                "integrityImpact": "COMPLETE",
                "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C",
                "version": "2.0"
              },
              "exploitabilityScore": 3.4,
              "impactScore": 10.0,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ]
        },
        "published": "2009-07-20T17:30:54.733",
        "references": [
          {
            "source": "secalert@redhat.com",
            "url": "http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0241.html"
          },
          {
            "source": "secalert@redhat.com",
            "url": "http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0246.html"
          },
          {
            "source": "secalert@redhat.com",
            "url": "http://article.gmane.org/gmane.linux.network/124939"
          },
          {
            "source": "secalert@redhat.com",
            "url": "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=3c8a9c63d5fd738c261bd0ceece04d9c8357ca13"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Patch"
            ],
            "url": "http://grsecurity.net/~spender/cheddar_bay.tgz"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Exploit"
            ],
            "url": "http://isc.sans.org/diary.html?storyid=6820"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Exploit"
            ],
            "url": "http://lkml.org/lkml/2009/7/6/19"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "http://secunia.com/advisories/35839"
          },
          {
            "source": "secalert@redhat.com",
            "url": "http://www.openwall.com/lists/oss-security/2009/07/17/1"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "http://www.vupen.com/english/advisories/2009/1925"
          },
          {
            "source": "secalert@redhat.com",
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=512284"
          },
          {
            "source": "secalert@redhat.com",
            "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/51803"
          },
          {
            "source": "secalert@redhat.com",
            "url": "https://www.redhat.com/en/blog/security-flaws-caused-compiler-optimizations"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0241.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0246.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://article.gmane.org/gmane.linux.network/124939"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=3c8a9c63d5fd738c261bd0ceece04d9c8357ca13"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch"
            ],
            "url": "http://grsecurity.net/~spender/cheddar_bay.tgz"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Exploit"
            ],
            "url": "http://isc.sans.org/diary.html?storyid=6820"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Exploit"
            ],
            "url": "http://lkml.org/lkml/2009/7/6/19"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "http://secunia.com/advisories/35839"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.openwall.com/lists/oss-security/2009/07/17/1"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "http://www.vupen.com/english/advisories/2009/1925"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=512284"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/51803"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://www.redhat.com/en/blog/security-flaws-caused-compiler-optimizations"
          }
        ],
        "sourceIdentifier": "secalert@redhat.com",
        "vendorComments": [
          {
            "comment": "Red Hat is aware of this issue and is tracking it via the following bug:\nhttps://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=CVE-2009-1897\n\nThe flaw only affects the Red Hat Enterprise Linux 5.4 beta kernel, which includes a backport of the upstream bug fix introducing this flaw (git commit 33dccbb0). This issue did not affect the final released Red Hat Enterprise Linux 5.4 kernel.  It is also possible to mitigate this flaw by ensuring that the permissions for /dev/net/tun is restricted to root only.\n\nThis issue does not affect any other released kernel in any Red Hat product.",
            "lastModified": "2009-09-02T00:00:00",
            "organization": "Red Hat"
          }
        ],
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-119"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2025-11-21T13:11:20+00:00",
      "cve": "CVE-2009-1897",
      "id": "CVE-2009-1897",
      "initial_release_date": "2009-04-09T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: tun/tap: Fix crashes if open() /dev/net/tun and then poll() it",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2009/cve-2009-1897.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.