CVE-2007-3362 in AGEphone
Summary
by MITRE
ageet AGEphone before 1.6.2, running on Windows Mobile 5 on the HTC HyTN Pocket PC device, allows remote attackers to (1) cause a denial of service (call disruption and device hang) via a SIP message with a malformed header and (2) cause a denial of service (call disruption, false ring indication, and device outage) via a SIP message with a malformed SDP delimiter.
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Analysis
by VulDB Data Team • 09/04/2018
The CVE-2007-3362 vulnerability affects the ageet AGEphone application version 1.6.1 and earlier, specifically when running on Windows Mobile 5 operating system on HTC HyTN Pocket PC devices. This vulnerability represents a significant security flaw in SIP (Session Initiation Protocol) implementation that impacts voice communication services on mobile platforms. The vulnerability stems from inadequate input validation and parsing mechanisms within the SIP message processing subsystem of the telephony application.
The technical flaw manifests through two distinct attack vectors that exploit malformed SIP messages. The first vector involves sending a SIP message containing a malformed header field that triggers a denial of service condition resulting in call disruption and device system hangs. The second vector targets the SDP (Session Description Protocol) delimiter parsing, where malformed SDP delimiters cause similar denial of service effects including call disruption, false ring indications, and complete device outages. These vulnerabilities demonstrate poor error handling and buffer overflow protection mechanisms in the SIP message parser implementation. The vulnerability is particularly concerning as it affects mobile telephony devices that rely on SIP for voice communication services, making them susceptible to remote exploitation without requiring physical access or authentication.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise the availability of critical communication services on mobile devices. Attackers can remotely induce device instability and call failures, which could be particularly problematic in emergency response scenarios or business environments where reliable communication is essential. The false ring indication capability suggests that attackers can manipulate the device's user interface to display incorrect call status information, potentially leading to miscommunication or security breaches. From an attacker perspective, this vulnerability aligns with the MITRE ATT&CK framework's T1499 technique for network denial of service, while also demonstrating characteristics of T1071 for application layer protocol manipulation. The vulnerability affects the availability and integrity of the communication services provided by the device, making it a significant concern for enterprise and personal users alike.
Mitigation strategies should focus on immediate software updates and patches to address the malformed SIP header and SDP delimiter parsing issues. Organizations should implement network monitoring to detect and block suspicious SIP traffic patterns that may indicate exploitation attempts. Device administrators should consider disabling unnecessary SIP functionality when not required for business operations. The vulnerability highlights the importance of input validation and proper error handling in telephony applications, aligning with CWE-129 for improper validation of array index and CWE-120 for buffer overflow conditions. Regular security assessments of mobile telephony applications and implementation of secure coding practices should be prioritized to prevent similar vulnerabilities in future deployments. Additionally, network segmentation and intrusion detection systems can provide additional layers of protection against exploitation attempts targeting these types of communication protocol vulnerabilities.