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CVE-2019-15691

Estado: ModificadaAlta (7.2)—

TigerVNC version prior to 1.10.1 is vulnerable to stack use-after-return, which occurs due to incorrect usage of stack memory in ZRLEDecoder. If decoding routine would throw an exception, ZRLEDecoder may try to access stack variable, which has been already freed during the process of stack unwinding. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.

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 (2)

Opensuse — LeapTigervnc — Tigervnc

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2019-15691",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.2,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.2
      }
    ]
  },
  "affected": [
    {
      "source": "vulnerability@kaspersky.com",
      "affectedData": [
        {
          "vendor": "Kaspersky",
          "product": "TigerVNC",
          "versions": [
            {
              "status": "affected",
              "version": "1.10.0"
            }
          ]
        }
      ]
    }
  ],
  "published": "2019-12-26T15:15:11.007",
  "references": [
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00039.html",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "vulnerability@kaspersky.com"
    },
    {
      "url": "https://github.com/CendioOssman/tigervnc/commit/d61a767d6842b530ffb532ddd5a3d233119aad40",
      "tags": [
        "Patch",
        "Third Party Advisory"
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      "source": "vulnerability@kaspersky.com"
    },
    {
      "url": "https://github.com/TigerVNC/tigervnc/releases/tag/v1.10.1",
      "tags": [
        "Release Notes",
        "Third Party Advisory"
      ],
      "source": "vulnerability@kaspersky.com"
    },
    {
      "url": "https://www.openwall.com/lists/oss-security/2019/12/20/2",
      "tags": [
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        "Mailing List",
        "Third Party Advisory"
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      "source": "vulnerability@kaspersky.com"
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      "url": "http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00039.html",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "url": "https://github.com/CendioOssman/tigervnc/commit/d61a767d6842b530ffb532ddd5a3d233119aad40",
      "tags": [
        "Patch",
        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://github.com/TigerVNC/tigervnc/releases/tag/v1.10.1",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "tags": [
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        "Mailing List",
        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "vulnerability@kaspersky.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-825"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-672"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "TigerVNC version prior to 1.10.1 is vulnerable to stack use-after-return, which occurs due to incorrect usage of stack memory in ZRLEDecoder. If decoding routine would throw an exception, ZRLEDecoder may try to access stack variable, which has been already freed during the process of stack unwinding. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity."
    },
    {
      "lang": "es",
      "value": "TigerVNC versiones anteriores a 1.10.1, es vulnerable al uso de la pila previo al retorno, que se presenta debido a un uso incorrecto de la memoria de pila en ZRLEDecoder. Si la rutina de decodificación arroja una excepción, ZRLEDecoder puede intentar acceder a la variable de la pila, que ya ha sido liberada durante el proceso del desempaquetado de la pila. La explotación de esta vulnerabilidad podría resultar potencialmente en una ejecución de código remota. Este ataque parece ser explotable a través de la conectividad de red."
    }
  ],
  "lastModified": "2026-06-17T02:20:53.037",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
              "matchCriteriaId": "5DB31840-DC35-40A5-8126-FF5FDD81EAD7",
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  "sourceIdentifier": "vulnerability@kaspersky.com"
}