CVE-2002-2227 in ssldump
Summary
by MITRE
Buffer underflow in ssldump 0.9b2 and earlier allows remote attackers to cause a denial of service (memory corruption) via a crafted SSLv2 challenge value.
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Analysis
by VulDB Data Team • 06/11/2018
The vulnerability identified as CVE-2002-2227 represents a critical buffer underflow condition within ssldump version 0.9b2 and earlier releases, a network protocol analyzer specifically designed for capturing and analyzing sslv2 protocol traffic. This flaw resides in the software's handling of sslv2 challenge values during the ssl handshake process, where the application fails to properly validate input data lengths before processing them into memory buffers. The issue manifests when ssldump encounters a crafted sslv2 challenge value that is shorter than the minimum expected buffer size, causing the application to write data beyond the allocated memory boundaries. This memory corruption vulnerability directly violates the fundamental security principle of input validation and can be exploited by remote attackers without authentication requirements, making it particularly dangerous in networked environments where ssl traffic monitoring is essential.
The technical exploitation of this buffer underflow vulnerability occurs during the sslv2 handshake phase when the ssldump tool receives a malformed challenge value from a remote sslv2 client or server. The software's insufficient bounds checking mechanism allows an attacker to craft a challenge value that triggers the underflow condition, causing memory corruption that can result in application crashes, unexpected behavior, or potentially arbitrary code execution depending on the specific memory layout and operating system environment. This vulnerability specifically aligns with CWE-121, which describes heap-based buffer underflows, and represents a classic example of improper input validation in network protocol parsing components. The attack vector is classified as remote and requires no special privileges, making it accessible to any attacker who can establish sslv2 connections to the target system.
The operational impact of CVE-2002-2227 extends beyond simple denial of service conditions, as the memory corruption can lead to system instability and potential information disclosure through application crashes that might expose sensitive memory contents. Organizations relying on ssldump for network security monitoring and analysis face significant risk from this vulnerability, particularly in environments where sslv2 traffic is still encountered or where the tool is used in security auditing contexts. The vulnerability affects the integrity of network monitoring operations and can be leveraged to disrupt security infrastructure that depends on proper ssl protocol analysis. According to ATT&CK framework category T1499, this vulnerability represents a denial of service attack that can compromise the availability of security monitoring systems, while also potentially enabling other attack vectors through memory corruption exploitation techniques.
Mitigation strategies for this vulnerability primarily involve immediate software updates to ssldump version 0.9b3 or later, which contain the necessary patches to address the buffer underflow condition. System administrators should also implement network segmentation and access controls to limit exposure to sslv2 traffic where possible, as sslv2 protocol support is deprecated and poses additional security risks beyond this specific vulnerability. Additional defensive measures include implementing network monitoring to detect and alert on unusual sslv2 handshake patterns, deploying intrusion detection systems that can identify exploitation attempts, and considering the complete removal of sslv2 support from network infrastructure. The vulnerability demonstrates the critical importance of input validation in security tools and highlights the necessity of regular security updates for network monitoring applications that process potentially malicious protocol data streams. Organizations should also conduct thorough vulnerability assessments of their network security tooling to identify similar buffer underflow conditions that may exist in other protocol analysis software components.