PT-2019-19890 · Madskristensen · Miniblog

Publicado 2019-06-14 · Atualizado 2019-06-19 · CVE-2019-9842

Positive Technologies (AI Summary)

CVSS v3.1

7.2

Alta

Vetor base

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

Name of the Vulnerable Software and Affected Versions madskristensen MiniBlog through 2018-05-18

Description The issue allows remote attackers to execute arbitrary ASPX code via an IMG element with a data: URL. This is because the SaveFilesToDisk function in app code/handlers/PostHandler.cs writes a decoded base64 string to a file without validating the extension.

Recommendations For madskristensen MiniBlog through 2018-05-18, consider validating file extensions before writing decoded base64 strings to disk to prevent arbitrary ASPX code execution. As a temporary workaround, restrict the ability to upload or save files with potentially dangerous extensions.

Exploit

Correção

Unrestricted File Upload

Enumeração de Fraquezas

CWE-434

Identificadores relacionados

CVE-2019-9842

Produtos afetados

Miniblog

Referências · 4

• 🔥 https://rastating.github.io/miniblog-remote-code-execution · Exploit
• https://github.com/madskristensen/MiniBlog/blob/1a7ae45ddba484e2c8f808e288e018748c9ddb57/Website/app_code/handlers/PostHandler.cs#L85 · Nota
• https://osv.dev/vulnerability/CVE-2019-9842 · Aviso do Fabricante
• https://nvd.nist.gov/vuln/detail/CVE-2019-9842 · Nota de Segurança