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Q1What is this vulnerability? (Essence + Consequences)
๐จ **Essence**: CVE-2025-1094 is a critical SQL Injection flaw in PostgreSQL's `libpq` client library. ๐ **Consequences**: Improper handling of quote syntax allows attackers to bypass input boundaries.โฆ
๐ก๏ธ **Root Cause**: CWE-149 (Improper Neutralization of Input During Web Page Generation). The flaw lies in `libpq` escape functions (`PQescapeLiteral`, `PQescapeString`, etc.).โฆ
๐ฅ **Affected**: PostgreSQL systems using `libpq` client libraries. ๐ฆ Specifically, applications that use the result of escape functions to construct input for `psql` (the interactive terminal).โฆ
๐ต๏ธ **Attacker Capabilities**: Hackers can inject malicious SQL commands. ๐ป They can read sensitive files (e.g., `/etc/passwd`). ๐ Crucially, they can escalate to **Remote Code Execution (RCE)**.โฆ
๐ฃ **Public Exploits**: YES. Multiple PoCs are available on GitHub. ๐ Examples: `soltanali0/CVE-2025-1094-Exploit` and `shacojx/CVE-2025-1094-Exploit`. ๐ These scripts demonstrate SQLi โ WebSocket Hijacking โ RCE.โฆ
๐ **Self-Check**: Scan for PostgreSQL instances using `libpq` with `BIG5` encoding settings. ๐งช Test if application input is passed directly to `psql` after escaping.โฆ
๐ฉน **Official Fix**: Refer to the official PostgreSQL security page: `https://www.postgresql.org/support/security/CVE-2025-1094/`. ๐ Published: 2025-02-13.โฆ
๐ง **No Patch Workaround**: Avoid using `psql` with dynamically constructed inputs from escaped strings. ๐ Disable `BIG5` encoding if not strictly necessary.โฆ