CVE-2024-32655 – Npgsql Vulnerable to SQL Injection via Protocol Message Size Overflow

https://notcve.org/view.php?id=CVE-2024-32655

Npgsql is the .NET data provider for PostgreSQL. The `WriteBind()` method in `src/Npgsql/Internal/NpgsqlConnector.FrontendMessages.cs` uses `int` variables to store the message length and the sum of parameter lengths. Both variables overflow when the sum of parameter lengths becomes too large. This causes Npgsql to write a message size that is too small when constructing a Postgres protocol message to send it over the network to the database. When parsing the message, the database will only read a small number of bytes and treat any following bytes as new messages while they belong to the old message. • https://github.com/npgsql/npgsql/commit/091655eed0c84e502ab424950c930339d17c1928 https://github.com/npgsql/npgsql/commit/3183efb2bdcca159c8c2e22af57e18ea8f853cf0 https://github.com/npgsql/npgsql/commit/67acbe027e28477ac2199e15cfb554bb2ffaf169 https://github.com/npgsql/npgsql/commit/703d9af8fa48dfe8c0180e36edb8278f34342d7b https://github.com/npgsql/npgsql/commit/a22a42d8141d7a3528f43c02c095a409507cf1af https://github.com/npgsql/npgsql/commit/e34e2ba8042e666d9af54a1b255fba4d5b11df56 https://github.com/npgsql/npgsql/commit/f7e7ead0702d776a8f551f5786c4cac2d65c4bc6 https://github.com&#x • CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') CWE-190: Integer Overflow or Wraparound •