CVE-2008-1922 in Squid Analysis Report Generator
Summary
by MITRE
Multiple stack-based buffer overflows in Sarg might allow attackers to execute arbitrary code via unknown vectors, probably a crafted Squid log file.
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Analysis
by VulDB Data Team • 08/10/2019
The vulnerability identified as CVE-2008-1922 represents a critical security flaw in Sarg, a popular web proxy log analysis tool widely used for generating reports from Squid proxy server logs. This vulnerability manifests as multiple stack-based buffer overflows that could potentially enable remote code execution on systems running affected versions of Sarg. The flaw specifically arises from insufficient input validation when processing Squid log files, creating opportunities for malicious actors to craft specially formatted log entries that trigger memory corruption conditions. The vulnerability's exploitation potential is significant given that Sarg is commonly deployed in enterprise environments where proxy log analysis is critical for security monitoring and compliance reporting.
The technical implementation of this vulnerability involves stack-based buffer overflows that occur when Sarg processes malformed or specially crafted Squid log entries. These buffer overflows typically result from inadequate bounds checking in string handling functions, where input data exceeds the allocated buffer space on the stack. Attackers can exploit this by creating malicious Squid log files containing oversized data fields or malformed entries that cause the application to write beyond the intended memory boundaries. The nature of stack-based buffer overflows makes them particularly dangerous as they can be leveraged to overwrite return addresses, function pointers, or other critical stack data, potentially allowing attackers to redirect program execution flow. This vulnerability aligns with CWE-121 stack-based buffer overflow classification and represents a classic example of improper input validation leading to memory corruption.
The operational impact of CVE-2008-1922 extends beyond simple denial of service conditions, as successful exploitation could provide attackers with complete system compromise. In environments where Sarg is used for security monitoring, attackers who gain code execution capabilities could potentially access sensitive proxy log data, modify audit trails, or establish persistent access to network infrastructure. The vulnerability's exploitation requires attackers to have the ability to influence or control Squid log content, which may be achievable through various attack vectors including man-in-the-middle positions or compromised proxy servers. Given that Sarg typically runs with elevated privileges to access proxy logs, successful exploitation could result in privilege escalation or complete system compromise. This vulnerability also relates to ATT&CK technique T1059 command and scripting interpreter for execution, as attackers might leverage the compromised system to run additional malicious payloads.
Organizations should immediately assess their Sarg installations and implement mitigations to address this vulnerability. The primary defense mechanism involves updating to patched versions of Sarg that include proper input validation and buffer boundary checks. System administrators should also implement network segmentation and access controls to limit who can influence Squid log content, as this reduces the attack surface for exploitation. Input sanitization measures should be implemented at the proxy server level to filter suspicious log entries before they reach Sarg processing. Additionally, monitoring and logging should be enhanced to detect unusual patterns in log file processing that might indicate exploitation attempts. Security teams should also consider implementing intrusion detection systems that can identify attempts to exploit buffer overflow vulnerabilities in web proxy analysis tools. Regular security assessments and vulnerability scanning should include checking for vulnerable Sarg installations, particularly in environments where proxy log analysis is critical for security operations.