CVE-2004-0450 in log2mail
Summary
by MITRE
format string vulnerability in the printlog function in log2mail before 0.2.5.2 allows local users or remote attackers to execute arbitrary code via format string specifiers in a logfile monitored by log2mail.
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Analysis
by VulDB Data Team • 04/23/2019
The vulnerability identified as CVE-2004-0450 represents a critical format string flaw within the printlog function of log2mail software prior to version 0.2.5.2. This issue manifests as a classic buffer overflow condition that occurs when the application processes log files containing format specifiers, creating an avenue for malicious code execution. The flaw exists in the software's handling of user-supplied input data, specifically within the logging and reporting mechanisms that process system log files.
This format string vulnerability operates by allowing attackers to inject malicious format specifiers into log files that log2mail monitors and processes. When the printlog function encounters these specifiers, it fails to properly validate or sanitize the input before using it in printf-like functions. The vulnerability can be exploited by local users who have access to modify log files or by remote attackers who can influence the contents of monitored log files through various attack vectors. The flaw directly maps to CWE-134, which specifically addresses the use of user-controlled format strings in functions that perform formatting operations.
The operational impact of this vulnerability extends beyond simple code execution, as it can enable full system compromise when exploited successfully. Attackers can leverage the format string vulnerability to overwrite memory locations, inject malicious code, or manipulate program flow to gain unauthorized access to the system. The vulnerability affects the integrity and confidentiality of the monitored logging infrastructure, potentially allowing attackers to escalate privileges or execute arbitrary commands with the privileges of the log2mail process. This represents a significant security risk for systems that rely on log2mail for automated email notifications based on log file contents.
Mitigation strategies for CVE-2004-0450 involve immediate patching of the log2mail software to version 0.2.5.2 or later, which contains the necessary fixes to properly sanitize format string inputs. Additionally, system administrators should implement proper file permissions and access controls to prevent unauthorized modification of log files that log2mail monitors. The remediation process should also include monitoring for potential exploitation attempts and implementing proper input validation mechanisms. From an operational security perspective, this vulnerability aligns with ATT&CK technique T1059.007 for command and scripting interpreter, as successful exploitation would allow for arbitrary code execution through the compromised logging process. Organizations should also consider implementing network segmentation and monitoring to detect unusual log file modifications that could indicate exploitation attempts.