CVE-2008-0871 in Sms Mms Gateway
Summary
by MITRE
Multiple stack-based buffer overflows in Now SMS/MMS Gateway 2007.06.27 and earlier allow remote attackers to execute arbitrary code via a (1) long password in an Authorization header to the HTTP service or a (2) large packet to the SMPP service.
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Analysis
by VulDB Data Team • 10/26/2024
The vulnerability identified as CVE-2008-0871 represents a critical security flaw in the Now SMS/MMS Gateway software version 2007.06.27 and earlier, exposing the system to remote code execution attacks through two distinct attack vectors. This vulnerability falls under the category of stack-based buffer overflows, which occur when more data is written to a fixed-length buffer than it can accommodate, leading to memory corruption and potential code execution. The affected software serves as an SMS and MMS gateway solution that facilitates communication between mobile networks and internet-based systems, making it a valuable target for attackers seeking to compromise mobile communication infrastructure.
The technical implementation of this vulnerability manifests through two primary attack vectors that exploit different service interfaces of the gateway software. The first vector involves sending an overly long password within the Authorization header of HTTP requests to the web service component, while the second vector targets the SMPP service through transmission of large packets that exceed buffer capacity limits. Both attack scenarios leverage the fundamental weakness of inadequate input validation and bounds checking in the software's handling of user-supplied data. The stack-based nature of these buffer overflows means that the overflow corrupts the program's execution stack, potentially allowing an attacker to overwrite return addresses, function pointers, or other critical stack data structures with malicious code pointers. This type of vulnerability is categorized as CWE-121 Stack-based Buffer Overflow, which is classified under the broader category of CWE-119 Improper Restriction of Operations within the Buffer.
The operational impact of CVE-2008-0871 extends beyond simple code execution, as it provides attackers with the capability to gain complete control over the affected system. Once successfully exploited, the remote code execution could enable attackers to install malware, modify system configurations, access sensitive data, or establish persistent backdoors within the mobile communication infrastructure. The implications are particularly severe given that SMS/MMS gateways often serve as critical communication channels for businesses, government agencies, and emergency services. The vulnerability's remote exploitability means that attackers need not have physical access to the system, and the attack can be launched from anywhere on the internet, making it particularly dangerous for organizations that expose these services to public networks. This vulnerability aligns with ATT&CK technique T1203 Exploitation for Client Execution, where adversaries leverage software vulnerabilities to execute malicious code on target systems.
Organizations utilizing Now SMS/MMS Gateway software should implement immediate mitigations to protect against exploitation of this vulnerability. The primary recommended action is to upgrade to a patched version of the software that addresses the buffer overflow conditions through proper input validation and bounds checking mechanisms. Additionally, network-level protections such as firewalls and intrusion prevention systems should be configured to limit access to the affected services, particularly restricting access to the HTTP and SMPP ports from untrusted networks. Implementing authentication mechanisms and rate limiting can help reduce the attack surface by preventing automated exploitation attempts. Security monitoring should be enhanced to detect unusual patterns in authentication requests and packet sizes that may indicate exploitation attempts. The vulnerability demonstrates the importance of input validation and proper memory management practices in software development, aligning with security best practices outlined in standards such as OWASP Top Ten and NIST SP 800-160. Organizations should also consider implementing network segmentation to isolate critical communication infrastructure and reduce the potential impact of successful exploitation. Regular vulnerability assessments and penetration testing should be conducted to identify similar weaknesses in other systems and ensure comprehensive security coverage across the organization's infrastructure.