GSD-2018-18385

Vulnerability from gsd - Updated: 2022-05-13 00:00
Details
Asciidoctor in versions < 1.5.8 allows remote attackers to cause a denial of service (infinite loop). The loop was caused by the fact that `Parser.next_block` was not exhausting all the lines in the reader as the while loop expected it would. This was happening because the regular expression that detects any list was not agreeing with the regular expression that detects a specific list type. So the line kept getting pushed back onto the reader, hence causing the loop.
Aliases
Aliases
CVE-2018-18385
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{
  "GSD": {
    "alias": "CVE-2018-18385",
    "description": "Asciidoctor in versions \u003c 1.5.8 allows remote attackers to cause a denial of service (infinite loop). The loop was caused by the fact that Parser.next_block was not exhausting all the lines in the reader as the while loop expected it would. This was happening because the regular expression that detects any list was not agreeing with the regular expression that detects a specific list type. So the line kept getting pushed back onto the reader, hence causing the loop.",
    "id": "GSD-2018-18385",
    "references": [
      "https://www.suse.com/security/cve/CVE-2018-18385.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "affected": [
        {
          "package": {
            "ecosystem": "RubyGems",
            "name": "asciidoctor",
            "purl": "pkg:gem/asciidoctor"
          }
        }
      ],
      "aliases": [
        "CVE-2018-18385",
        "GHSA-qc9p-mjxm-j2wj"
      ],
      "details": "Asciidoctor in versions \u003c 1.5.8 allows remote attackers to cause a denial\nof service (infinite loop). The loop was caused by the fact that `Parser.next_block`\nwas not exhausting all the lines in the reader as the while loop expected it would.\nThis was happening because the regular expression that detects any list was not\nagreeing with the regular expression that detects a specific list type. So the line\nkept getting pushed back onto the reader, hence causing the loop.\n",
      "id": "GSD-2018-18385",
      "modified": "2022-05-13T00:00:00.000Z",
      "published": "2022-05-13T00:00:00.000Z",
      "references": [
        {
          "type": "WEB",
          "url": "https://github.com/asciidoctor/asciidoctor/issues/2888"
        }
      ],
      "schema_version": "1.4.0",
      "severity": [
        {
          "score": 7.5,
          "type": "CVSS_V3"
        }
      ],
      "summary": "Asciidoctor Infinite Loop vulnerability"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2018-18385",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "n/a",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "n/a"
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      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "Asciidoctor in versions \u003c 1.5.8 allows remote attackers to cause a denial of service (infinite loop). The loop was caused by the fact that Parser.next_block was not exhausting all the lines in the reader as the while loop expected it would. This was happening because the regular expression that detects any list was not agreeing with the regular expression that detects a specific list type. So the line kept getting pushed back onto the reader, hence causing the loop."
          }
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      },
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      "references": {
        "reference_data": [
          {
            "name": "https://github.com/asciidoctor/asciidoctor/issues/2888",
            "refsource": "MISC",
            "url": "https://github.com/asciidoctor/asciidoctor/issues/2888"
          }
        ]
      }
    },
    "github.com/rubysec/ruby-advisory-db": {
      "cve": "2018-18385",
      "cvss_v3": 7.5,
      "date": "2022-05-13",
      "description": "Asciidoctor in versions \u003c 1.5.8 allows remote attackers to cause a denial\nof service (infinite loop). The loop was caused by the fact that `Parser.next_block`\nwas not exhausting all the lines in the reader as the while loop expected it would.\nThis was happening because the regular expression that detects any list was not\nagreeing with the regular expression that detects a specific list type. So the line\nkept getting pushed back onto the reader, hence causing the loop.\n",
      "gem": "asciidoctor",
      "ghsa": "qc9p-mjxm-j2wj",
      "patched_versions": [
        "\u003e= 1.5.8"
      ],
      "title": "Asciidoctor Infinite Loop vulnerability",
      "url": "https://github.com/asciidoctor/asciidoctor/issues/2888"
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003c1.5.8",
          "affected_versions": "All versions before 1.5.8",
          "cvss_v2": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "cvss_v3": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "cwe_ids": [
            "CWE-1035",
            "CWE-835",
            "CWE-937"
          ],
          "date": "2019-10-03",
          "description": "Asciidoctor allows remote attackers to cause a denial of service (infinite loop). The loop was caused by the fact that `Parser.next_block` was not exhausting all the lines in the reader as the while loop expected it would.",
          "fixed_versions": [
            "1.5.8"
          ],
          "identifier": "CVE-2018-18385",
          "identifiers": [
            "CVE-2018-18385"
          ],
          "not_impacted": "All versions starting from 1.5.8",
          "package_slug": "gem/asciidoctor",
          "pubdate": "2018-10-16",
          "solution": "Upgrade to version 1.5.8 or above.",
          "title": "Loop with Unreachable Exit Condition (Infinite Loop)",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2018-18385"
          ],
          "uuid": "d3078fbe-70b6-4065-a79f-acfed35a0be8"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
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        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:asciidoctor:asciidoctor:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "1.5.8",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
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          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2018-18385"
        },
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        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "Asciidoctor in versions \u003c 1.5.8 allows remote attackers to cause a denial of service (infinite loop). The loop was caused by the fact that Parser.next_block was not exhausting all the lines in the reader as the while loop expected it would. This was happening because the regular expression that detects any list was not agreeing with the regular expression that detects a specific list type. So the line kept getting pushed back onto the reader, hence causing the loop."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-835"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/asciidoctor/asciidoctor/issues/2888",
              "refsource": "MISC",
              "tags": [
                "Exploit",
                "Third Party Advisory"
              ],
              "url": "https://github.com/asciidoctor/asciidoctor/issues/2888"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 5.0,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.0"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2019-10-03T00:03Z",
      "publishedDate": "2018-10-16T16:50Z"
    }
  }
}



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