CyberSecBulletin
CVE-2022-27378NVD status: Modified

Mariadb: Improper Neutralization of Special Elements used in an SQL Command

Published Updated By the CyberSecBulletin desk

CVE-2022-27378 is a high-severity improper neutralization of special elements used in an SQL command vulnerability in Mariadb, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists versions 10.2.44, 10.3.35, 10.4.25 as the first without the flaw, so updating Mariadb to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 2.41% chance of exploitation within 30 days, higher than 84% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Mariadb to 10.2.44 or 10.3.35 or 10.4.25 or 10.5.16, whichever matches your release line, or a later version.
  2. Read the advisory on jira.mariadb.org for workarounds and exact fixed builds.
  3. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
MariaDBMariadb10.2.0 up to, but not including, 10.2.44; 10.3.0 up to, but not including, 10.3.35; 10.4.0 up to, but not including, 10.4.25; 10.5.0 up to, but not including, 10.5.16; 10.6.0 up to, but not including, 10.6.8; 10.7.0 up to, but not including, 10.7.4; 10.8.0 up to, but not including, 10.8.3; 10.910.2.44, 10.3.35, 10.4.25, 10.5.16, 10.6.8, 10.7.4
DebianDebian Linux10.0Not stated

Version data comes from NVD's product matching. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
NoneNo data is disclosed.
Integrity
NoneNothing can be modified.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.17.5HighNVD
CVSS 2.05.0MediumNVD

Official description

An issue in the component Create_tmp_table::finalize of MariaDB Server v10.7 and below was discovered to allow attackers to cause a Denial of Service (DoS) via specially crafted SQL statements.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Neutralization of Special Elements used in an SQL Command

The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.

How developers prevent this class of flaw

  • Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, consider using persistence layers such as Hibernate or Enterprise Java Beans, which can provide significant protection against SQL injection if used properly.
  • For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
  • When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.

More Improper Neutralization of Special Elements used in an SQL Command vulnerabilities (CWE-89)

Timeline

  1. CVE record published.
  2. Record last changed materially (score, affected products, status or references).

References

Advisories

Third-party and government advisories

Other vulnerabilities in Mariadb

All Mariadb vulnerabilities

Recent Improper Neutralization of Special Elements used in an SQL Command vulnerabilities

Spotted an error? Tell us.