SQL Injection in Npgsql

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. Attackers can abuse this to inject arbitrary Postgres protocol messages into the connection, leading to the execution of arbitrary SQL statements on the application's behalf. This vulnerability is fixed in 4.0.14, 4.1.13, 5.0.18, 6.0.11, 7.0.7, and 8.0.3.

Vulnerability class: SQL Injection

EPSS: 0.017 (75.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

  • Npgsql — versions >= 4.0.0, < 4.0.14, >= 4.1.0, < 4.1.13, >= 5.0.0, < 5.0.18

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2024-32655?
CVE-2024-32655 is a high-severity vulnerability in Npgsql, classified under SQL Injection. CVSS score: 8.1/10. Published 2024-05-14.
How severe is CVE-2024-32655?
High severity. CVSS v3 base score is 8.1 out of 10.
Is CVE-2024-32655 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.