CVE-2007-0634 in Solaris
Summary
by MITRE
Unspecified vulnerability in Sun Solaris 10 before 20070130 allows remote attackers to cause a denial of service (system crash) via certain ICMP packets.
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Analysis
by VulDB Data Team • 06/14/2025
The vulnerability identified as CVE-2007-0634 represents a critical denial of service flaw within Sun Solaris 10 operating systems prior to the 20070130 patch release. This weakness specifically manifests when the system processes certain malformed or crafted ICMP packets, leading to system instability and potential complete system crash. The vulnerability exists at the network protocol handling layer where the Solaris kernel fails to properly validate incoming ICMP traffic, creating an exploitable condition that remote attackers can leverage without requiring authentication or elevated privileges.
From a technical perspective, this vulnerability stems from inadequate input validation within the Internet Control Message Protocol implementation in the Solaris kernel. The flaw occurs when the system receives ICMP packets containing malformed headers or unexpected payload structures that the kernel's processing routines cannot handle gracefully. This type of vulnerability aligns with CWE-129, which describes improper validation of input boundaries, and represents a classic case of insufficient error handling in network protocol stacks. The vulnerability affects the kernel's network subsystem and operates at the foundational level of the operating system, making it particularly dangerous as it can disrupt core system functionality and potentially impact network services.
The operational impact of CVE-2007-0634 extends beyond simple service disruption, as it can result in complete system crashes requiring manual reboot procedures and potentially leading to data loss or service interruptions for critical infrastructure. Attackers can exploit this vulnerability by simply sending carefully crafted ICMP packets to a target system, making the attack vector extremely accessible and difficult to defend against through traditional network monitoring approaches. The vulnerability also maps to ATT&CK technique T1499.001, which covers network denial of service attacks, and demonstrates how weaknesses in core operating system components can enable adversaries to achieve system compromise through indirect means.
Mitigation strategies for this vulnerability primarily involve applying the appropriate security patches released by Sun Microsystems, specifically the patch corresponding to the 20070130 update that addresses the ICMP processing flaws. System administrators should also implement network segmentation and access control measures to limit exposure, such as filtering ICMP traffic at network boundaries or implementing firewall rules that restrict ICMP packet types. Additionally, monitoring network traffic for unusual ICMP patterns and implementing intrusion detection systems can help identify exploitation attempts. Organizations should consider implementing network-based anomaly detection to identify potential exploitation attempts and maintain comprehensive backup and recovery procedures to minimize downtime in case of successful attacks. The vulnerability serves as a reminder of the critical importance of maintaining up-to-date security patches and the potential consequences of delaying patch deployment in enterprise environments.