FKIE_CVE-2026-78183

Vulnerability from fkie_nvd - Published: 2026-08-23 20:16 - Updated: 2026-10-14 13:10
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
DBD::Pg version 3.21.0 for Perl has a heap out-of-bounds write in quote_float. quote_float() allocates the length of the string + 1, which is the size of the bare numeric symbol plus NULL. But for special literals NaN, Inf, +Inf, -Inf, Infinity, +Infinity, -Infinity it emits the literal surrounded by quotes plus NULL, which is length + 3 bytes. Every recognised literal (case-insensitive) overflows by 2 bytes, a single quote and a NULL. This can be reached by the $dbh->quote method, for example $dbh->quote( "Infinity", DBI::SQL_NUMERIC ). This regression was introduced in 3.21.0 by the quote.c rewrite.
References
9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://github.com/bucardo/dbdpg/commit/6d6f47ed2403cda55c82b1bad56e388ba7390065.patch
9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://github.com/bucardo/dbdpg/commit/adacf1de872326a465e13f9e4281a674ebcd227e
9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://github.com/bucardo/dbdpg/security/advisories/GHSA-785p-fw3v-r822
9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://metacpan.org/release/TURNSTEP/DBD-Pg-3.21.1/source/Changes
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2026/08/23/5
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "DBD::Pg"
          ],
          "packageName": "DBD-Pg",
          "packageURL": "pkg:cpan/DBD-Pg",
          "programFiles": [
            "quote.c"
          ],
          "programRoutines": [
            {
              "name": "quote_float"
            }
          ],
          "repo": "https://github.com/bucardo/dbdpg",
          "versions": [
            {
              "status": "affected",
              "version": "3.21.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "DBD::Pg version 3.21.0 for Perl has a heap out-of-bounds write in quote_float.\n\nquote_float() allocates the length of the string + 1, which is the size of the bare numeric symbol plus NULL.  But for special literals NaN, Inf, +Inf, -Inf, Infinity, +Infinity, -Infinity it emits the literal surrounded by quotes plus NULL, which is length + 3 bytes. Every recognised literal (case-insensitive) overflows by 2 bytes, a single quote and a NULL.\n\nThis can be reached by the $dbh-\u003equote method, for example\n\n    $dbh-\u003equote( \"Infinity\", DBI::SQL_NUMERIC ).\n\nThis regression was introduced in 3.21.0 by the quote.c rewrite."
    },
    {
      "lang": "es",
      "value": "DBD::Pg versi\u00f3n 3.21.0 para Perl tiene una escritura fuera de l\u00edmites en el heap en quote_float.\n\nquote_float() asigna la longitud de la cadena + 1, que es el tama\u00f1o del s\u00edmbolo num\u00e9rico simple m\u00e1s NULL. Pero para los literales especiales NaN, Inf, +Inf, -Inf, Infinity, +Infinity, -Infinity, emite el literal rodeado de comillas m\u00e1s NULL, lo que es longitud + 3 bytes. Cada literal reconocido (sin distinci\u00f3n entre may\u00fasculas y min\u00fasculas) desborda por 2 bytes, una comilla simple y un NULL.\n\nEsto puede ser alcanzado mediante el m\u00e9todo $dbh -\u003e quote, por ejemplo\n\n    $dbh -\u003e quote( \u0027Infinity\u0027, DBI::SQL_NUMERIC ).\n\nEsta regresi\u00f3n fue introducida en la versi\u00f3n 3.21.0 por la reescritura de quote.c."
    }
  ],
  "id": "CVE-2026-78183",
  "lastModified": "2026-10-14T13:10:00.187",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-78183",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-25T19:32:23.591734Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-23T20:16:50.550",
  "references": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://github.com/bucardo/dbdpg/commit/6d6f47ed2403cda55c82b1bad56e388ba7390065.patch"
    },
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://github.com/bucardo/dbdpg/commit/adacf1de872326a465e13f9e4281a674ebcd227e"
    },
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://github.com/bucardo/dbdpg/security/advisories/GHSA-785p-fw3v-r822"
    },
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://metacpan.org/release/TURNSTEP/DBD-Pg-3.21.1/source/Changes"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.openwall.com/lists/oss-security/2026/08/23/5"
    }
  ],
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "type": "Secondary"
    }
  ]
}



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