WAF - SQL Injection Attack (SQLIA) Vulnerability Subscribe to Security Advisories

Wednesday, July 18, 2018
Monday, July 23, 2018
Summary 

A remote attacker could send specially-crafted SQL statements, which could be passed through by the ACOS Web Application Firewall (WAF) rather than being dropped per configured rules. This could allow a remote attacker to conduct an SQL injection attack on targeted systems. Accordingly, the following vulnerabilities are addressed in this document.

Item # Vulnerability ID Score Source Score Summary
1 A10-2017-0008 (a) CVSS 3.0 7.4 High WAF: SQL Injection Attack (SQLIA) Vulnerability

(a) A10 Networks, Inc. assigned identifier.

Affected Releases

The table below indicates releases of ACOS exposed to these vulnerabilities and ACOS releases that address them. ACOS release families not indicated below are unaffected by these vulnerabilities.

Customers using affected ACOS releases can overcome vulnerability exposures by updating to the indicated resolved release. If the table does not list a corresponding resolved or unaffected release, then no ACOS release update is currently available.

Releases AffectedReleases Resolved or Unaffected

4.1.2 – 4.1.2-P3

4.1.2-P4

4.1.1 – 4.1.1-P7

4.1.1-P8

4.1.0 – 4.1.0-P10

4.1.0-P11

2.7.2 – 2.7.2-P11

2.7.2-P12

2.7.1-GR1 – 2.7.1-GR1-Px

2.7.2-P12, 4.1.0-P11, 4.1.1-P8, 4.1.2-P4, 4.1.4

Workarounds and Mitigations 

Include the following ACOS aFleX command as an effective mitigation for this vulnerability, in lieu of upgrading to a resolved release indicated above and recognizing that this workaround may have a negative impact on throughput and performance of the ACOS system.

WAF::rule sqlia-check HTTP_REQUEST_DATA {REQUEST_COOKIES_NAMES REQUEST_COOKIES ARGS_NAMES ARGS} {URL_DECODE_UNICODE LOWERCASE} {@POLICY sqlia_defs} {
    log "field [WAF::matched var] name [WAF::matched name] may contain SQL: [WAF::matched match 0]"
    WAF::action deny
}
WAF::rule is an undocumented aFleX command, the format of which is:
WAF::rule name event variable-list transformation-list match action
Software Updates 

Software updates that address these vulnerabilities are or will be published at the following URL:

http://www.a10networks.com/support/axseries/software-downloads

Vulnerability Details

The following table shares brief descriptions for the vulnerabilities addressed in this document.

Vulnerability IDVulnerability Description
A10-2017-0008

SQL injection vulnerability in ACOS Web Application Firewall (WAF) allows attackers to execute arbitrary SQL commands via unspecified vectors on protected systems.

Acknowledgements 

A10 Networks, Inc would like to thank Luca Profico from Quantum Leap Srl for reporting this vulnerability.

Modification History 
RevisionDateDescription
1.0
July 18, 2018

Initial Publication

2.0
July 23, 2018

Added acknowledgement