CVE-2005-3781 in Solaris
Summary
by MITRE
Unspecified vulnerability in in.named in Solaris 9 allows attackers to cause a denial of service via unknown manipulations that cause in.named to "make unnecessary queries."
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Analysis
by VulDB Data Team • 03/12/2021
The vulnerability described in CVE-2005-3781 represents a denial of service weakness within the in.named resolver component of Solaris 9 operating systems. This issue manifests when attackers exploit unspecified manipulations that lead the in.named process to generate unnecessary DNS queries, ultimately resulting in system resource exhaustion and service disruption. The vulnerability specifically targets the Internet Named Daemon which serves as the primary DNS resolver service in Solaris environments, making it a critical component for network operations and system availability.
The technical flaw resides in the insufficient input validation and query handling mechanisms within the in.named service implementation. When malicious or malformed DNS requests are processed, the resolver fails to properly sanitize or limit query generation, allowing attackers to craft specific inputs that trigger excessive query behavior. This type of vulnerability falls under the broader category of resource exhaustion attacks where the attacker leverages legitimate system functionality to consume available resources such as memory, CPU cycles, or network bandwidth. The unspecified nature of the manipulations suggests that the vulnerability could potentially be triggered through various attack vectors including malformed DNS packets, crafted zone transfers, or specific query patterns that cause the resolver to recursively query other servers unnecessarily.
From an operational impact perspective, this vulnerability poses significant risks to network infrastructure stability and availability. The denial of service condition can result in complete DNS resolution failures for affected systems, disrupting network connectivity and potentially affecting numerous dependent services that rely on proper DNS resolution. Organizations running Solaris 9 systems with in.named services would experience cascading failures as applications and users lose the ability to resolve domain names, leading to service interruptions that could span across entire network segments or organizations. The vulnerability is particularly concerning because it operates at the core DNS resolution layer, making it difficult to detect and isolate from other network issues, and could potentially be exploited by automated scanning tools to identify vulnerable targets.
Security mitigations for this vulnerability should focus on implementing proper input validation and query limiting mechanisms within the DNS resolver configuration. System administrators should consider applying the latest security patches and updates from Oracle that address this specific vulnerability, as well as implementing network-level controls such as DNS query rate limiting and access control lists to restrict potentially malicious queries. The implementation of monitoring solutions that track unusual query patterns and excessive DNS traffic can help detect exploitation attempts before they cause significant disruption. This vulnerability aligns with CWE-400, which addresses resource exhaustion issues, and relates to ATT&CK technique T1499.004 for network denial of service attacks. Organizations should also consider implementing redundant DNS services and proper network segmentation to minimize the impact of such attacks on overall network operations and maintain business continuity during potential exploitation attempts.