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CVE-2017-6891 (GCVE-0-2017-6891)

Vulnerability from cvelistv5 – Published: 2017-05-22 19:00 – Updated: 2024-08-05 15:41
VLAI
Summary
Two errors in the "asn1_find_node()" function (lib/parser_aux.c) within GnuTLS libtasn1 version 4.10 can be exploited to cause a stacked-based buffer overflow by tricking a user into processing a specially crafted assignments file via the e.g. asn1Coding utility.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
  • Stack-based buffer overflow leading to system compromise
Assigner
References
Impacted products
Vendor Product Version CPE status
Flexera Software LLC GnuTLS libtasn1 Affected: 4.10. Other versions may also be affected.
guessed Create a notification for this product.
Date Public
2017-05-22 00:00
Show details on NVD website
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            "value": "Two errors in the \"asn1_find_node()\" function (lib/parser_aux.c) within GnuTLS libtasn1 version 4.10 can be exploited to cause a stacked-based buffer overflow by tricking a user into processing a specially crafted assignments file via the e.g. asn1Coding utility."
          },
          {
            "lang": "es",
            "value": "Se pueden explotar dos errores en la funci\u00f3n \\\"asn1_find_node()\\\" (lib/parser_aux.c) en GnuTLS libtasn1 versi\u00f3n 4.10 para provocar un desbordamiento de b\u00fafer basado en pila enga\u00f1ando a un usuario para que procese un archivo de asignaciones especialmente manipulado mediante la utilidad de ejemplo asn1Coding."
          }
        ],
        "id": "CVE-2017-6891",
        "lastModified": "2026-05-13T00:24:29.033",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "MEDIUM",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 6.8,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
                "version": "2.0"
              },
              "exploitabilityScore": 8.6,
              "impactScore": 6.4,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": true
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 8.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2017-05-22T19:29:00.250",
        "references": [
          {
            "source": "PSIRT-CNA@flexerasoftware.com",
            "url": "http://git.savannah.gnu.org/gitweb/?p=libtasn1.git%3Ba=commit%3Bh=5520704d075802df25ce4ffccc010ba1641bd484"
          },
          {
            "source": "PSIRT-CNA@flexerasoftware.com",
            "tags": [
              "Broken Link"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00018.html"
          },
          {
            "source": "PSIRT-CNA@flexerasoftware.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "http://www.debian.org/security/2017/dsa-3861"
          },
          {
            "source": "PSIRT-CNA@flexerasoftware.com",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://www.securityfocus.com/bid/98641"
          },
          {
            "source": "PSIRT-CNA@flexerasoftware.com",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://www.securitytracker.com/id/1038619"
          },
          {
            "source": "PSIRT-CNA@flexerasoftware.com",
            "url": "https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E"
          },
          {
            "source": "PSIRT-CNA@flexerasoftware.com",
            "url": "https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E"
          },
          {
            "source": "PSIRT-CNA@flexerasoftware.com",
            "tags": [
              "Permissions Required"
            ],
            "url": "https://secuniaresearch.flexerasoftware.com/advisories/76125/"
          },
          {
            "source": "PSIRT-CNA@flexerasoftware.com",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://secuniaresearch.flexerasoftware.com/secunia_research/2017-11/"
          },
          {
            "source": "PSIRT-CNA@flexerasoftware.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://security.gentoo.org/glsa/201710-11"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://git.savannah.gnu.org/gitweb/?p=libtasn1.git%3Ba=commit%3Bh=5520704d075802df25ce4ffccc010ba1641bd484"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Broken Link"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00018.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "http://www.debian.org/security/2017/dsa-3861"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://www.securityfocus.com/bid/98641"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://www.securitytracker.com/id/1038619"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Permissions Required"
            ],
            "url": "https://secuniaresearch.flexerasoftware.com/advisories/76125/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://secuniaresearch.flexerasoftware.com/secunia_research/2017-11/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://security.gentoo.org/glsa/201710-11"
          }
        ],
        "sourceIdentifier": "PSIRT-CNA@flexerasoftware.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-787"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-05-13T03:56:01+00:00",
      "cve": "CVE-2017-6891",
      "id": "CVE-2017-6891",
      "initial_release_date": "2017-05-18T00:00:00+00:00",
      "product_status:known_affected": "13",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "libtasn1: Stack-based buffer overflow in asn1_find_node()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2017/cve-2017-6891.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-13T00:18:39Z",
      "cve": "CVE-2017-6891",
      "id": "CVE-2017-6891",
      "initial_release_date": "2023-02-15T04:48:38Z",
      "product_status:known_not_affected": "333",
      "product_status:recommended": "89",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2017-6891",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2017-6891.json",
      "version": "20"
    }
  }
}



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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.


Detection rules are retrieved from Rulezet.


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.