CVE-2005-2369 in ekg
Summary
by MITRE
Multiple integer signedness errors in libgadu, as used in ekg before 1.6rc2 and other packages, may allow remote attackers to cause a denial of service or execute arbitrary code.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 06/09/2019
The vulnerability identified as CVE-2005-2369 represents a critical security flaw within the libgadu library, which serves as a core component in various instant messaging applications including the ekg client prior to version 1.6rc2. This library implements the Gadu-Gadu protocol, a popular messaging protocol used primarily in Poland and other eastern European countries. The flaw manifests through multiple integer signedness errors that occur during the processing of network packets and data structures, creating opportunities for malicious actors to exploit the software through carefully crafted inputs.
The technical nature of this vulnerability stems from improper handling of integer values during packet parsing operations within the libgadu library. When processing incoming data from network connections, the library fails to properly validate the signedness of integer variables, leading to potential overflow conditions and memory corruption scenarios. These signedness errors create opportunities for attackers to manipulate integer values in ways that cause unexpected behavior in the application's memory management systems. The flaw specifically affects how the library handles packet sizes, sequence numbers, and other integer-based fields that control the flow of data processing within the messaging protocol implementation.
The operational impact of this vulnerability extends beyond simple denial of service conditions to potentially enable remote code execution on affected systems. Attackers can leverage these integer signedness errors to craft malicious packets that trigger buffer overflows, memory corruption, or other exploitable conditions within the vulnerable applications. When the ekg client or other affected software processes these malformed packets, the improper integer handling can lead to stack corruption, heap corruption, or other memory management failures that may be exploited to execute arbitrary code with the privileges of the affected application. This represents a severe security risk particularly in environments where these messaging applications are used for business communications or sensitive data exchange.
Mitigation strategies for CVE-2005-2369 primarily focus on immediate software updates and patches to address the underlying integer signedness issues within the libgadu library. System administrators should prioritize updating the ekg client to version 1.6rc2 or later, as well as ensuring all other applications that depend on vulnerable versions of libgadu receive appropriate updates. Network-level protections can include implementing packet filtering rules to limit incoming connections from untrusted sources and monitoring for unusual packet patterns that might indicate exploitation attempts. The vulnerability aligns with CWE-190, which specifically addresses integer overflow and underflow conditions, and demonstrates characteristics consistent with ATT&CK technique T1203, involving the exploitation of software vulnerabilities for code execution. Organizations should also consider implementing application whitelisting policies to restrict execution of vulnerable software until proper patches are deployed across all affected systems.