CVE-2003-1112 in Siparator
Summary
by MITRE
The Session Initiation Protocol (SIP) implementation in Ingate Firewall and Ingate SIParator before 3.1.3 allows remote attackers to cause a denial of service and possibly execute arbitrary code via crafted INVITE messages, as demonstrated by the OUSPG PROTOS c07-sip test suite.
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Analysis
by VulDB Data Team • 11/19/2024
The vulnerability identified as CVE-2003-1112 represents a critical flaw in the Session Initiation Protocol implementation within Ingate Firewall and Ingate SIParator devices running versions prior to 3.1.3. This issue exposes the underlying SIP infrastructure to remote exploitation through specifically crafted INVITE messages that can trigger both denial of service conditions and potential arbitrary code execution. The vulnerability was demonstrated using the OUSPG PROTOS c07-sip test suite, which validates the exploitability of SIP implementations against various attack vectors. The flaw resides in how these devices process incoming SIP INVITE requests, particularly in their handling of malformed or specially constructed message parameters that can cause unexpected behavior in the underlying SIP parsing and processing mechanisms.
The technical nature of this vulnerability stems from inadequate input validation and buffer handling within the SIP implementation layer of the affected devices. When processing crafted INVITE messages, the systems fail to properly validate the structure and content of the SIP headers and body, leading to potential buffer overflows or memory corruption conditions. This type of vulnerability falls under the CWE-121 category of "Stack-based Buffer Overflow" or potentially CWE-787 "Out-of-bounds Write" depending on the specific implementation details. The flaw exploits the fundamental trust placed in SIP message parsing, where attackers can manipulate the message format to trigger unexpected execution paths in the SIP processing code.
The operational impact of this vulnerability extends beyond simple denial of service to potentially allow remote code execution, making it particularly dangerous for organizations relying on SIP-based communication systems. The ability to execute arbitrary code remotely means that attackers could gain full control over the affected devices, potentially using them as launch points for further attacks within the network infrastructure. This vulnerability affects the core communication capabilities of the devices, as SIP is fundamental to VoIP and multimedia communication services. Organizations using these devices could experience complete service disruption, loss of communication capabilities, and potential data compromise. The vulnerability's exploitation through the OUSPG PROTOS test suite demonstrates that it is not merely theoretical but has been validated in real-world testing scenarios.
Mitigation strategies for CVE-2003-1112 should focus on immediate firmware upgrades to versions 3.1.3 or later, which contain the necessary patches to address the input validation flaws in the SIP implementation. Network administrators should also implement additional monitoring and intrusion detection measures to identify potential exploitation attempts through anomalous SIP traffic patterns. The ATT&CK framework categorizes this vulnerability under T1210 "Exploitation of Remote Services" and potentially T1059 "Command and Scripting Interpreter" if arbitrary code execution is achieved, highlighting the multi-faceted nature of the threat. Organizations should also consider implementing SIP-specific firewalls and filtering rules that can detect and block malformed INVITE messages before they reach the vulnerable systems. Regular security assessments and vulnerability scanning of SIP implementations should be conducted to identify similar weaknesses in other communication infrastructure components that might be susceptible to similar exploitation techniques.