python-ldap has sanitization bypass in ldap.filter.escape_filter_chars

python-ldap is a lightweight directory access protocol (LDAP) client API for Python. In versions prior to 3.4.5, the sanitization method `ldap.filter.escape_filter_chars` can be tricked to skip escaping of special characters when a crafted `list` or `dict` is supplied as the `assertion_value` parameter, and the non-default `escape_mode=1` is configured. The method `ldap.filter.escape_filter_chars` supports 3 different escaping modes. `escape_mode=0` (default) and `escape_mode=2` happen to raise exceptions when a `list` or `dict` object is supplied as the `assertion_value` parameter. However, `escape_mode=1` computes without performing adequate logic to ensure a fully escaped return value. If an application relies on the vulnerable method in the `python-ldap` library to escape untrusted user input, an attacker might be able to abuse the vulnerability to launch ldap injection attacks which could potentially disclose or manipulate ldap data meant to be inaccessible to them. Version 3.4.5 fixes the issue by adding a type check at the start of the `ldap.filter.escape_filter_chars` method to raise an exception when the supplied `assertion_value` parameter is not of type `str`.

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特殊命令到另一不同平面时的净化处理不恰当(特殊命令注入)

python-ldap 安全漏洞

python-ldap是python基金会的一个用于 Python 的 LDAP 客户端 API。 python-ldap 3.4.5之前版本存在安全漏洞，该漏洞源于ldap.filter.escape_filter_chars方法在escape_mode=1模式下未正确处理list或dict类型的assertion_value参数，可能导致LDAP注入攻击。

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