CVE Vulnerabilities


Heap-based Buffer Overflow

Published: Feb 18, 2022 | Modified: Nov 07, 2023
CVSS 3.x
CVSS 2.x

MariaDB CONNECT Storage Engine Heap-based Buffer Overflow Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of MariaDB. Authentication is required to exploit this vulnerability. The specific flaw exists within the processing of SQL queries. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the service account. Was ZDI-CAN-16190.


A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Affected Software

Name Vendor Start Version End Version
Mariadb Mariadb 10.2.0 (including) 10.2.42 (excluding)
Mariadb Mariadb 10.3.0 (including) 10.3.33 (excluding)
Mariadb Mariadb 10.4.0 (including) 10.4.23 (excluding)
Mariadb Mariadb 10.5.0 (including) 10.5.14 (excluding)
Mariadb Mariadb 10.6.0 (including) 10.6.6 (excluding)
Mariadb Mariadb 10.7.0 (including) 10.7.2 (excluding)
Mariadb Mariadb 10.8.0 (including) 10.8.0 (including)
Red Hat Enterprise Linux 8 RedHat mariadb:10.5-8060020220614163302.ad008a3a *
Red Hat Enterprise Linux 8 RedHat mariadb:10.3-8060020220715055054.ad008a3a *
Red Hat Enterprise Linux 9 RedHat mariadb-3:10.5.16-2.el9_0 *
Red Hat Software Collections for Red Hat Enterprise Linux 7 RedHat rh-mariadb105-mariadb-3:10.5.16-2.el7 *
Red Hat Software Collections for Red Hat Enterprise Linux 7 RedHat rh-mariadb103-mariadb-3:10.3.35-1.el7 *
Mariadb-10.0 Ubuntu trusty *
Mariadb-10.0 Ubuntu xenial *
Mariadb-10.1 Ubuntu bionic *
Mariadb-10.1 Ubuntu trusty *
Mariadb-10.1 Ubuntu xenial *
Mariadb-10.3 Ubuntu focal *
Mariadb-10.3 Ubuntu trusty *
Mariadb-10.3 Ubuntu xenial *
Mariadb-10.5 Ubuntu impish *
Mariadb-10.5 Ubuntu trusty *
Mariadb-10.5 Ubuntu xenial *
Mariadb-10.6 Ubuntu kinetic *
Mariadb-10.6 Ubuntu lunar *
Mariadb-10.6 Ubuntu trusty *
Mariadb-10.6 Ubuntu xenial *
Mariadb-5.5 Ubuntu trusty *
Mariadb-5.5 Ubuntu xenial *

Potential Mitigations

  • Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking.
  • D3-SFCV (Stack Frame Canary Validation) from D3FEND [REF-1334] discusses canary-based detection in detail.
  • Run or compile the software using features or extensions that randomly arrange the positions of a program’s executable and libraries in memory. Because this makes the addresses unpredictable, it can prevent an attacker from reliably jumping to exploitable code.
  • Examples include Address Space Layout Randomization (ASLR) [REF-58] [REF-60] and Position-Independent Executables (PIE) [REF-64]. Imported modules may be similarly realigned if their default memory addresses conflict with other modules, in a process known as “rebasing” (for Windows) and “prelinking” (for Linux) [REF-1332] using randomly generated addresses. ASLR for libraries cannot be used in conjunction with prelink since it would require relocating the libraries at run-time, defeating the whole purpose of prelinking.
  • For more information on these techniques see D3-SAOR (Segment Address Offset Randomization) from D3FEND [REF-1335].