Vulnerability Information
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Vulnerability Title
Synapse can be forced to thumbnail unexpected file formats, invoking external, potentially untrustworthy decoders
Vulnerability Description
Synapse is an open-source Matrix homeserver. In Synapse versions before 1.120.1, enabling the dynamic_thumbnails option or processing a specially crafted request could trigger the decoding and thumbnail generation of uncommon image formats, potentially invoking external tools like Ghostscript for processing. This significantly expands the attack surface in a historically vulnerable area, presenting a risk that far outweighs the benefit, particularly since these formats are rarely used on the open web or within the Matrix ecosystem. Synapse 1.120.1 addresses the issue by restricting thumbnail generation to images in the following widely used formats: PNG, JPEG, GIF, and WebP. This vulnerability is fixed in 1.120.1.
CVSS Information
N/A
Vulnerability Type
危险类型文件的不加限制上传
Vulnerability Title
Element Synapse 安全漏洞
Vulnerability Description
Element Synapse是Element开源的一个开源 Matrix 家庭服务器实现。 Element Synapse存在安全漏洞，该漏洞源于启用 dynamic_thumbnails 选项或处理特制请求可能会触发对不常见图像格式的解码和缩略图生成。
CVSS Information
N/A
Vulnerability Type
N/A