CVE-2005-1349 in Perl
Summary
by MITRE
Buffer overflow in Convert-UUlib (Convert::UUlib) before 1.051 allows remote attackers to execute arbitrary code via a malformed parameter to a read operation.
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Analysis
by VulDB Data Team • 01/01/2025
The vulnerability identified as CVE-2005-1349 represents a critical buffer overflow flaw within the Convert::UUlib Perl module, specifically affecting versions prior to 1.051. This issue resides in the UU encoding and decoding functionality that is commonly used for converting binary data into ASCII text format. The vulnerability manifests when the module processes malformed parameters during read operations, creating a condition where an attacker can manipulate input data to overflow allocated memory buffers. Such buffer overflows typically occur when programs fail to properly validate input lengths against allocated buffer sizes, allowing malicious data to overwrite adjacent memory regions. The flaw specifically impacts the Convert::UUlib library which is part of the Perl ecosystem and is often utilized in applications that handle UUencoded data, making it a potential vector for code execution attacks across various systems.
The technical implementation of this vulnerability stems from inadequate input validation mechanisms within the UU decoding routines. When the module encounters a malformed UU encoded parameter during read operations, the underlying buffer management fails to properly bounds-check the data being processed. This lack of proper validation creates a scenario where attacker-controlled input can exceed the allocated buffer boundaries, potentially overwriting critical program memory including return addresses, function pointers, or other control data. The vulnerability aligns with CWE-121, which describes buffer overflow conditions where insufficient bounds checking allows attackers to write past the end of allocated buffers. The specific nature of this flaw makes it particularly dangerous as it can be exploited remotely, allowing attackers to inject and execute arbitrary code on vulnerable systems without requiring local access or authentication.
The operational impact of CVE-2005-1349 extends beyond simple code execution, as it represents a fundamental security weakness in Perl-based applications that process UU encoded data. Systems utilizing vulnerable versions of Convert::UUlib could be compromised through various attack vectors including web applications, email servers, or file processing services that handle UU encoded content. The vulnerability's remote exploitability means that attackers can potentially compromise systems from outside the local network, making it particularly dangerous for publicly accessible services. This flaw also aligns with ATT&CK technique T1059 which involves executing malicious code through command-line interfaces, as successful exploitation would likely involve injecting executable code into the target system's memory space. The vulnerability affects a wide range of applications that depend on Perl's UU encoding capabilities, making it a significant concern for system administrators managing legacy Perl environments.
Mitigation strategies for CVE-2005-1349 focus primarily on immediate remediation through version updates, as the vulnerability was addressed in Convert::UUlib version 1.051 and later releases. System administrators should prioritize updating all affected Perl installations and verify that no vulnerable versions remain in production environments. Additional protective measures include implementing input validation at application layers to sanitize UU encoded data before processing, deploying network-based intrusion detection systems to monitor for exploitation attempts, and considering sandboxing techniques for applications that handle untrusted UU encoded content. Organizations should also conduct comprehensive audits of their Perl-based systems to identify all instances of Convert::UUlib usage and ensure proper patch management protocols are in place. The vulnerability serves as a reminder of the importance of maintaining current security patches and the critical need for proper bounds checking in all input processing routines, particularly in libraries that handle binary data conversion operations.