CVE-2019-7484 in SMA100
Summary
by MITRE
Authenticated SQL Injection in SonicWall SMA100 allow user to gain read-only access to unauthorized resources using viewcacert CGI script. This vulnerability impacted SMA100 version 9.0.0.3 and earlier.
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Analysis
by VulDB Data Team • 12/20/2019
The SonicWall SMA100 series appliances represent enterprise-grade secure access solutions that provide remote access and network security services for organizations. These devices operate as part of critical network infrastructure, managing authentication, encryption, and secure remote connections for distributed workforces. The vulnerability identified as CVE-2019-7484 specifically targets the SMA100 appliance running firmware versions 9.0.0.3 and earlier, where an authenticated SQL injection flaw exists within the viewcacert CGI script. This represents a significant security weakness that allows attackers with valid credentials to exploit the device's database interface and extract unauthorized information from the system's backend database.
The technical flaw manifests through improper input validation within the viewcacert CGI script which processes user-supplied parameters without adequate sanitization or parameterized query construction. When an authenticated user submits malicious input to this script, the application fails to properly escape or validate the input before incorporating it into SQL database queries. This vulnerability falls under CWE-89 which specifically addresses SQL injection flaws where untrusted data is directly incorporated into SQL command strings without proper validation or escaping mechanisms. The flaw enables an attacker to manipulate the underlying database queries and potentially extract sensitive information through UNION-based SQL injection techniques, allowing unauthorized access to data that should remain protected within the appliance's secure environment.
The operational impact of this vulnerability extends beyond simple data exposure, as it provides attackers with read-only access to unauthorized resources within the SMA100 appliance's database. This access could potentially reveal sensitive configuration data, user credentials, certificate information, or other confidential data stored within the appliance's backend systems. The authenticated nature of the vulnerability means that an attacker would need valid user credentials to exploit this flaw, but this requirement significantly reduces the attack surface and makes the vulnerability more dangerous when combined with other credential compromise techniques. The compromised system could serve as a foothold for further attacks within the network infrastructure, potentially allowing lateral movement and privilege escalation through the exposure of additional sensitive information. According to ATT&CK framework, this vulnerability maps to T1071.004 for application layer protocol usage and T1083 for file and directory discovery, as attackers could use the exposed data to plan further exploitation activities.
Organizations utilizing SonicWall SMA100 appliances should implement immediate mitigations including applying the vendor-provided security patches and firmware updates that address the SQL injection vulnerability. Network segmentation and access control measures should be strengthened to limit the potential impact of credential compromise, while monitoring systems should be enhanced to detect unusual database access patterns or unauthorized data extraction attempts. Regular security assessments and vulnerability scanning should be conducted to identify similar issues within the appliance's web interface and CGI scripts. The remediation process should include comprehensive testing of the patched firmware to ensure that the SQL injection vulnerability has been properly addressed without introducing regressions in the appliance's functionality. Additionally, organizations should review their access control policies and implement principle of least privilege to minimize the potential damage from authenticated attacks, while maintaining detailed audit logs to track access to sensitive system components.