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CVE-2022-28345

Estado: ModificadaAlta (7.5)—

The Signal app before 5.34 for iOS allows URI spoofing via RTLO injection. It incorrectly renders RTLO encoded URLs beginning with a non-breaking space, when there is a hash character in the URL. This technique allows a remote unauthenticated attacker to send legitimate looking links, appearing to be any website URL, by abusing the non-http/non-https automatic rendering of URLs. An attacker can spoof, for example, example.com, and masquerade any URL with a malicious destination. An attacker requires a subdomain such as gepj, txt, fdp, or xcod, which would appear backwards as jpeg, txt, pdf, and docx respectively.

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)

Signal — Signal

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2022-28345",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
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        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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        "type": "Primary",
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          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
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  "affected": [
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      "affectedData": [
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  "published": "2022-04-15T06:15:06.597",
  "references": [
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      "url": "https://blog.malwarebytes.com/social-engineering/2022/03/uri-spoofing-flaw-could-phish-whatsapp-signal-instagram-and-imessage-users/",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "value": "CWE-74"
        }
      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Signal app before 5.34 for iOS allows URI spoofing via RTLO injection. It incorrectly renders RTLO encoded URLs beginning with a non-breaking space, when there is a hash character in the URL. This technique allows a remote unauthenticated attacker to send legitimate looking links, appearing to be any website URL, by abusing the non-http/non-https automatic rendering of URLs. An attacker can spoof, for example, example.com, and masquerade any URL with a malicious destination. An attacker requires a subdomain such as gepj, txt, fdp, or xcod, which would appear backwards as jpeg, txt, pdf, and docx respectively."
    },
    {
      "lang": "es",
      "value": "La aplicación Signal versiones anteriores a 5.34 para iOS permite una suplantación de URI por medio de una inyección de RTLO. Representa incorrectamente las URL codificadas con RTLO que comienzan con un espacio sin romper, cuando se presenta un carácter de hash en la URL. Esta técnica permite a un atacante remoto no autenticado enviar enlaces de aspecto legítimo, aparentando ser cualquier URL de un sitio web, al abusar de la renderización automática de URLs no http/no https. Un atacante puede falsificar, por ejemplo, example.com, y enmascarar cualquier URL con un destino malicioso. Un atacante requiere un subdominio como gepj, txt, fdp o xcod, que aparecerían al revés como jpeg, txt, pdf y docx respectivamente"
    }
  ],
  "lastModified": "2026-06-17T04:38:24.383",
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}