CVE-2007-6563 in WinAce
Summary
by MITRE
Heap-based buffer overflow in WinAce 2.65 and earlier, and possibly other versions before 2.69, allows user-assisted remote attackers to execute arbitrary code via a long filename in a compressed UUE archive.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 08/02/2019
The vulnerability identified as CVE-2007-6563 represents a critical heap-based buffer overflow affecting WinAce 2.65 and earlier versions, with potential impact extending to versions prior to 2.69. This flaw resides within the handling of compressed uuencoded archives and specifically targets the processing of filenames within these archive structures. The vulnerability operates through a user-assisted remote attack vector, meaning that an attacker must convince a victim to open a maliciously crafted archive file for the exploit to be successful. The technical implementation involves the software's failure to properly validate the length of filenames contained within uuencoded archive files, leading to memory corruption when the application attempts to store excessively long filenames in heap-allocated buffers.
The operational impact of this vulnerability extends beyond simple code execution, as it enables attackers to potentially gain complete control over affected systems. When a victim opens a specially crafted compressed archive containing an overly long filename, the buffer overflow can result in arbitrary code execution with the privileges of the affected application. This represents a significant threat vector since uuencoded archives are commonly used for file transfers and can be easily embedded in email attachments or web content. The heap corruption occurs during the decompression process when the application attempts to store the malicious filename in memory, potentially overwriting adjacent memory structures and allowing attackers to manipulate program execution flow through controlled data injection.
From a cybersecurity perspective, this vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The attack pattern follows typical exploit chains documented in MITRE ATT&CK framework under technique T1059 for command and scripting interpreter, as successful exploitation would likely result in code execution that could be leveraged for further system compromise. The vulnerability demonstrates the importance of proper input validation in archive processing utilities, particularly when dealing with user-provided data that may contain maliciously crafted elements designed to overflow allocated buffers.
Mitigation strategies for CVE-2007-6563 primarily focus on immediate software updates to versions 2.69 and later, which contain patches addressing the buffer overflow issue. Organizations should implement comprehensive patch management procedures to ensure all instances of WinAce are updated across their networks, particularly in environments where users may encounter untrusted archive files. Additional protective measures include implementing email filtering and web content restrictions to prevent automatic execution of potentially malicious archive files, as well as deploying network monitoring solutions that can detect suspicious archive file transfers. System administrators should also consider implementing application whitelisting policies that restrict execution of archive utilities to trusted environments and regularly audit archive processing configurations to ensure no unnecessary file extraction capabilities remain enabled. The vulnerability serves as a reminder of the critical importance of regular security updates and proper input validation in preventing remote code execution exploits.