github - ghsa-2vq7-8vvf-w66v

GHSA-2VQ7-8VVF-W66V

Vulnerability from github – Published: 2024-05-03 03:31 – Updated: 2025-03-28 12:31

Details

The specific flaw exists within the parsing of SPF macros. When parsing SPF macros, the process does not properly validate user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-17578.

Severity ?

7.5 (High)


                  
                    CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2023-42118"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-191"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-03T03:15:50Z",
    "severity": "HIGH"
  },
  "details": "Exim libspf2 Integer Underflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Exim libspf2. Authentication is not required to exploit this vulnerability. \n\nThe specific flaw exists within the parsing of SPF macros. When parsing SPF macros, the process does not properly validate user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-17578.",
  "id": "GHSA-2vq7-8vvf-w66v",
  "modified": "2025-03-28T12:31:34Z",
  "published": "2024-05-03T03:31:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-42118"
    },
    {
      "type": "WEB",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-23-1472"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/03/28/1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2023-42118 (GCVE-0-2023-42118)

Vulnerability from cvelistv5 – Published: 2024-05-03 02:13 – Updated: 2025-03-28 12:04

Summary

Exim libspf2 Integer Underflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Exim libspf2. Authentication is not required to exploit this vulnerability. The specific flaw exists within the parsing of SPF macros. When parsing SPF macros, the process does not properly validate user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the service account. . Was ZDI-CAN-17578.

Severity ?

7.5 (High)


                        
                          CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-191 - Integer Underflow (Wrap or Wraparound)

Assigner

zdi

References

URL

Tags

https://www.zerodayinitiative.com/advisories/ZDI-…

x_research-advisory

Impacted products

	Vendor	Product	Version
	Exim	libspf2	Affected: exim 4.96-RC0-14-24b8ed847-XX

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JSON

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{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:exim:libspf2:*:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "libspf2",
            "vendor": "exim",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2023-42118",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-07-03T14:45:10.464774Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-07-03T20:58:33.989Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-03-28T12:04:20.804Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "ZDI-23-1472",
            "tags": [
              "x_research-advisory",
              "x_transferred"
            ],
            "url": "https://www.zerodayinitiative.com/advisories/ZDI-23-1472/"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/03/28/1"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "libspf2",
          "vendor": "Exim",
          "versions": [
            {
              "status": "affected",
              "version": "exim 4.96-RC0-14-24b8ed847-XX"
            }
          ]
        }
      ],
      "dateAssigned": "2023-09-06T21:25:45.475Z",
      "datePublic": "2023-09-27T22:21:14.249Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Exim libspf2 Integer Underflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Exim libspf2. Authentication is not required to exploit this vulnerability. \n\nThe specific flaw exists within the parsing of SPF macros. When parsing SPF macros, the process does not properly validate user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the service account.\n. Was ZDI-CAN-17578."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-191",
              "description": "CWE-191: Integer Underflow (Wrap or Wraparound)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-09-18T18:30:11.548Z",
        "orgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
        "shortName": "zdi"
      },
      "references": [
        {
          "name": "ZDI-23-1472",
          "tags": [
            "x_research-advisory"
          ],
          "url": "https://www.zerodayinitiative.com/advisories/ZDI-23-1472/"
        }
      ],
      "source": {
        "lang": "en",
        "value": "Anonymous"
      },
      "title": "Exim libspf2 Integer Underflow Remote Code Execution Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
    "assignerShortName": "zdi",
    "cveId": "CVE-2023-42118",
    "datePublished": "2024-05-03T02:13:26.055Z",
    "dateReserved": "2023-09-06T21:14:24.436Z",
    "dateUpdated": "2025-03-28T12:04:20.804Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-2VQ7-8VVF-W66V

CVE-2023-42118 (GCVE-0-2023-42118)

Tags

Sightings

Nomenclature