漏洞信息
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Vulnerability Title
pgAdmin 4: OS command injection in MASTER_PASSWORD_HOOK via untrusted username substitution
Vulnerability Description
The MASTER_PASSWORD_HOOK setting, introduced in pgAdmin 4 7.2, lets an administrator configure an external command that returns a per-user encryption key, with %u in the configured string replaced by the current user's name. The previous implementation substituted the username directly into the command string and executed the result with subprocess.Popen(..., shell=True). Because the username can originate from an external authentication source (OAuth/OIDC claims, Kerberos, webserver auth) rather than a value pgAdmin fully controls, a username containing shell metacharacters (';', '$()', backticks, pipes, '&&', newlines) allowed an authenticated user to execute arbitrary commands as the pgAdmin service account in any deployment where the configured hook string uses %u.
Fix tokenises the trusted, administrator-configured hook string into an argument vector first (using shlex in POSIX-quoting mode, with backslash-escaping disabled so Windows-style paths are not mis-parsed), substitutes the untrusted username into the individual argv elements, and executes with shell=False. The username is therefore always confined to a single argv element; any shell metacharacters it contains are inert. Administrators whose MASTER_PASSWORD_HOOK previously relied on shell features (pipes, redirection, environment-variable expansion, globbing) within the hook string itself must move that logic into the invoked script, since it is no longer interpreted by a shell.
This issue affects pgAdmin 4: from 7.2 before 9.17.
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Vulnerability Title
pgAdmin 命令注入漏洞
Vulnerability Description
pgAdmin是pgAdmin组织开源的一个用于开源数据库 PostgreSQL 的开源管理和开发平台。 pgAdmin 7.2版本至9.17之前版本存在命令注入漏洞,该漏洞源于MASTER_PASSWORD_HOOK设置中,管理员配置的外部命令将%u替换为当前用户名时,未对用户名进行安全处理,直接拼接到命令字符串并通过shell执行,可能导致经过身份验证的攻击者以pgAdmin服务账户执行任意命令。
CVSS Information
N/A
Vulnerability Type
N/A