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CVE-2023-45666

Estado: ModificadaCrítica (9.8)—

stb_image is a single file MIT licensed library for processing images. It may look like `stbi__load_gif_main` doesn’t give guarantees about the content of output value `*delays` upon failure. Although it sets `*delays` to zero at the beginning, it doesn’t do it in case the image is not recognized as GIF and a call to `stbi__load_gif_main_outofmem` only frees possibly allocated memory in `*delays` without resetting it to zero.

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Thus it would be fair to say the caller of `stbi__load_gif_main` is responsible to free the allocated memory in `*delays` only if `stbi__load_gif_main` returns a non null value. However at the same time the function may return null value, but fail to free the memory in `*delays` if internally `stbi__convert_format` is called and fails. Thus the issue may lead to a memory leak if the caller chooses to free `delays` only when `stbi__load_gif_main` didn’t fail or to a double-free if the `delays` is always freed

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Nothings — STB Image.h

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2023-45666",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2023-45666",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-09-12T14:07:55.124467Z"
        }
      }
    ],
    "cvssMetricV31": [
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        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.3,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 3.4,
        "exploitabilityScore": 3.9
      },
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        "type": "Primary",
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          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
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  "affected": [
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      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "nothings",
          "product": "stb",
          "versions": [
            {
              "status": "affected",
              "version": "<= 2.28"
            }
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      "affectedData": [
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          "vendor": "nothings",
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  "published": "2023-10-21T00:15:09.077",
  "references": [
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      "tags": [
        "Third Party Advisory"
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    },
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      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NMXKOKPP4BKTNUTF5KSRDQAWOUILQZNO/",
      "source": "security-advisories@github.com"
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      "source": "security-advisories@github.com"
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      "source": "security-advisories@github.com"
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    {
      "url": "https://securitylab.github.com/advisories/GHSL-2023-145_GHSL-2023-151_stb_image_h/",
      "tags": [
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    {
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
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      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QVABVF4GEM6BYD5L4L64RCRSXUHY6LGN/",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
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          "lang": "en",
          "value": "CWE-415"
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    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-415"
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    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "stb_image is a single file MIT licensed library for processing images.  It may look like `stbi__load_gif_main` doesn’t give guarantees about the content of output value `*delays` upon failure. Although it sets `*delays` to zero at the beginning, it doesn’t do it in case the image is not recognized as GIF and a call to `stbi__load_gif_main_outofmem` only frees possibly allocated memory in `*delays` without resetting it to zero. Thus it would be fair to say the caller of `stbi__load_gif_main` is responsible to free the allocated memory in `*delays` only if `stbi__load_gif_main` returns a non null value. However at the same time the function may return null value, but fail to free the memory in `*delays` if internally `stbi__convert_format` is called and fails. Thus the issue may lead to a memory leak if the caller chooses to free `delays` only when `stbi__load_gif_main` didn’t fail or to a double-free if the `delays` is always freed"
    },
    {
      "lang": "es",
      "value": "stb_image es una librería con licencia MIT de un solo archivo para procesar imágenes. Puede parecer que `stbi__load_gif_main` no ofrece garantías sobre el contenido del valor de salida `*delays` en caso de falla. Aunque establece `*delays` en cero al principio, no lo hace en caso de que la imagen no se reconozca como GIF y una llamada a `stbi__load_gif_main_outofmem` solo libera la memoria posiblemente asignada en `*delays` sin restablecerla a cero. Por lo tanto, sería justo decir que la persona que llama a `stbi__load_gif_main` es responsable de liberar la memoria asignada en `*delays` solo si `stbi__load_gif_main` devuelve un valor no nulo. Sin embargo, al mismo tiempo, la función puede devolver un valor nulo, pero no puede liberar la memoria en `*delays` si internamente se llama a `stbi__convert_format` y falla. Por lo tanto, el problema puede provocar una pérdida de memoria si la persona que llama elige liberar los \"delays\" solo cuando \"stbi__load_gif_main\" no falló o una doble liberación si los \"delays\" siempre se liberan."
    }
  ],
  "lastModified": "2026-06-17T06:29:18.627",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:nothings:stb_image.h:2.28:*:*:*:*:*:*:*",
              "vulnerable": true,
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}