CVE-2024-32655 - CVE House
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Status published High CVE-2024-32655

Npgsql Vulnerable to SQL Injection via Protocol Message Size Overflow

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

Affected Vendor

Affected Software

npgsql
Vulnerable Versions:
>= 4.0.0, < 4.0.14, >= 4.1.0, < 4.1.13, >= 5.0.0, < 5.0.18, >= 6.0.0, < 6.0.11, >= 7.0.0, < 7.0.7, >= 8.0.0, < 8.0.3

Timeline

Official Publish: May 9th, 2024
Last Modified: December 12th, 2024
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

CWE-190 CWE-89

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application
Initial Access
T1068 Exploitation for Privilege Escalation
Privilege Escalation
T1055 Process Injection
Defense Evasion
T1105 Ingress Tool Transfer
Command and Control
T1499 Endpoint Denial of Service
Impact
T1059 Command and Scripting Interpreter
Execution
T1213.006 Databases
Collection
T1485 Data Destruction
Impact