DuckDB: sniff_csv provides filesystem access even when enable_external_access is disabled

DuckDB is a SQL database management system. In versions 1.0.0 and prior, content in filesystem is accessible for reading using `sniff_csv`, even with `enable_external_access=false`. This vulnerability provides an attacker with access to filesystem even when access is expected to be disabled and other similar functions do NOT provide access. There seem to be two vectors to this vulnerability. First, access to files that should otherwise not be allowed. Second, the content from a file can be read (e.g. `/etc/hosts`, `proc/self/environ`, etc) even though that doesn't seem to be the intent of the sniff_csv function. A fix for this issue is available in commit c9b7c98aa0e1cd7363fe8bb8543a95f38e980d8a and is expected to be part of version 1.1.0.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

信息暴露

DuckDB 安全漏洞

DuckDB是DuckDB开源的一个进程内 SQL OLAP 数据库管理系统。 DuckDB 1.0.0及之前的版本存在安全漏洞，该漏洞源于即使在enable_external_access被禁用的情况下sniff_csv也能提供文件系统访问，从而导致攻击者能够访问文件系统。

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