CVE-2007-1344 in ezstream
Summary
by MITRE
Multiple buffer overflows in src/ezstream.c in Ezstream before 0.3.0 allow remote attackers to execute arbitrary code via a crafted XML configuration file processed by the (1) urlParse function, which causes a stack-based overflow and the (2) ReplaceString function, which causes a heap-based overflow. NOTE: some of these details are obtained from third party information.
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Analysis
by VulDB Data Team • 07/13/2021
The vulnerability described in CVE-2007-1344 represents a critical security flaw in Ezstream version 0.2.9 and earlier, which is a command-line streaming tool for Icecast servers. This vulnerability manifests as multiple buffer overflows that can be exploited remotely, potentially allowing attackers to execute arbitrary code on systems running vulnerable versions of the software. The issue stems from improper input validation and memory management within the XML configuration file processing functionality of Ezstream.
The technical implementation of this vulnerability involves two distinct overflow conditions that occur during XML configuration file processing. The first overflow occurs in the urlParse function which triggers a stack-based buffer overflow, while the second overflow happens in the ReplaceString function causing a heap-based buffer overflow. Both overflow conditions arise from insufficient bounds checking when processing user-supplied XML data that contains crafted malicious input. The stack-based overflow in urlParse typically occurs when the application attempts to copy data into a fixed-size buffer on the stack without proper size validation, while the heap-based overflow in ReplaceString happens during dynamic memory allocation operations where insufficient bounds checking allows data to overwrite adjacent heap memory regions.
The operational impact of this vulnerability is severe and far-reaching, particularly in environments where Ezstream is used for streaming audio content to Icecast servers. Remote attackers can exploit these buffer overflows to gain arbitrary code execution privileges on the target system, potentially leading to complete system compromise. The vulnerability affects systems where Ezstream processes XML configuration files from untrusted sources, making it particularly dangerous in web-based or networked environments where configuration files might be downloaded from external sources. Successful exploitation could result in unauthorized access to system resources, data theft, service disruption, and potential lateral movement within network infrastructure. The vulnerability is especially concerning because it requires no local privileges to exploit, making it accessible to any remote attacker who can influence the XML configuration file processing.
Mitigation strategies for this vulnerability should focus on immediate remediation through software version updates to Ezstream 0.3.0 or later, which contains the necessary patches to address the buffer overflow conditions. System administrators should also implement strict input validation and sanitization procedures for all XML configuration files, particularly those sourced from external or untrusted origins. Network segmentation and access controls should be enforced to limit exposure of Ezstream services to untrusted networks. Additionally, implementing intrusion detection systems that monitor for suspicious XML parsing activities and conducting regular security assessments of streaming infrastructure can help identify potential exploitation attempts. The vulnerability aligns with CWE-121 Stack-based Buffer Overflow and CWE-122 Heap-based Buffer Overflow categories, and represents a typical example of ATT&CK technique T1059 Command and Scripting Interpreter where attackers leverage buffer overflows to execute malicious code. Organizations should also consider implementing application whitelisting policies and regularly updating all streaming and media processing software to prevent similar vulnerabilities from being exploited in their infrastructure.