CVE-2005-1163 in Yager
Summary
by MITRE
Multiple buffer overflows in Yager 5.24 and earlier allow remote attackers to execute arbitrary code via (1) a crafted nickname or (2) a packet with a large amount of data.
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Analysis
by VulDB Data Team • 07/24/2022
The vulnerability identified as CVE-2005-1163 represents a critical security flaw affecting Yager 5.24 and earlier versions, a popular instant messaging and chat application. This vulnerability stems from inadequate input validation mechanisms within the software's network packet processing functionality, creating exploitable conditions that can be leveraged by remote attackers to gain unauthorized system control. The affected software operates within the context of network communications, making it particularly dangerous as it can be exploited over public networks without requiring local system access or authentication.
The technical implementation of this vulnerability manifests through two distinct attack vectors that exploit buffer overflow conditions in the application's memory management. The first vector involves crafting a malicious nickname that exceeds the allocated buffer space, while the second vector targets packet processing with oversized data payloads that overwhelm the application's memory allocation limits. Both attack scenarios result in memory corruption that allows attackers to overwrite critical program execution pointers and inject malicious code into the target system's memory space. This type of vulnerability directly maps to CWE-121, which describes stack-based buffer overflow conditions, and CWE-122, which addresses heap-based buffer overflow scenarios, demonstrating the comprehensive nature of the memory corruption attack surface.
From an operational impact perspective, successful exploitation of CVE-2005-1163 enables remote attackers to execute arbitrary code with the privileges of the affected application process, typically resulting in complete system compromise. The vulnerability's remote exploitability means that attackers can target systems without physical access or prior authentication, making it particularly dangerous in enterprise environments where instant messaging applications are widely deployed. The attack can lead to unauthorized data access, system control, and potential lateral movement within network environments, as attackers can establish persistent access points and use compromised systems as launch platforms for additional attacks. This vulnerability aligns with ATT&CK technique T1059, which covers command and scripting interpreter usage, and T1071, which addresses application layer protocols, as attackers can leverage the compromised system for further malicious activities.
The mitigation strategies for this vulnerability primarily focus on immediate software updates and patches provided by the vendor, as the flaw exists within the core application logic rather than external dependencies. System administrators should prioritize patch deployment across all affected Yager installations, as the vulnerability cannot be effectively mitigated through network-level controls or configuration changes alone. Additional protective measures include implementing network segmentation to limit exposure, monitoring for unusual packet patterns that may indicate exploitation attempts, and establishing robust application whitelisting policies to prevent unauthorized code execution. The vulnerability's nature as a classic buffer overflow also highlights the importance of implementing modern memory protection mechanisms such as stack canaries, address space layout randomization, and data execution prevention techniques to reduce the exploitability of similar flaws in other applications. Organizations should conduct comprehensive vulnerability assessments to identify other potentially affected systems and ensure proper network monitoring capabilities are in place to detect and respond to exploitation attempts effectively.