CVE-1999-1032 in Ultrix
Summary
by MITRE
vulnerability in lat/telnet gateway (lattelnet) on ultrix 4.1 and 4.2 allows attackers to gain root privileges.
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Analysis
by VulDB Data Team • 06/23/2021
The vulnerability identified as CVE-1999-1032 represents a critical privilege escalation flaw within the lat/telnet gateway implementation on Ultrix operating systems version 4.1 and 4.2. This issue specifically targets the lattelnet service which serves as a gateway facilitating communication between local area network protocols and telnet services. The flaw enables remote attackers to execute arbitrary code with root privileges, fundamentally compromising the security posture of affected systems. The vulnerability stems from improper privilege handling within the gateway process that fails to adequately validate or restrict access controls when processing incoming connections.
The technical nature of this vulnerability can be categorized under CWE-264, which addresses permissions, privileges, and access controls. The flaw manifests when the lattelnet service receives network connections and processes them without proper authentication checks or privilege separation mechanisms. Attackers exploit this by crafting specific network requests that cause the gateway to execute commands with elevated privileges. The vulnerability operates at the system level where the service runs with root privileges, allowing malicious input to directly translate into unauthorized administrative access. This represents a classic example of privilege escalation through improper access control implementation.
The operational impact of CVE-1999-1032 extends beyond simple unauthorized access, as it provides attackers with complete control over affected systems. Once exploited, compromised systems become potential launch points for further network infiltration, data exfiltration, or lateral movement within the network infrastructure. The vulnerability affects organizations running legacy Ultrix systems, particularly those in research institutions or specialized environments where such older operating systems may still be deployed. The implications are severe as the attack vector requires minimal sophistication to exploit, making it attractive to both automated attacks and determined adversaries seeking persistent access to network resources.
Mitigation strategies for this vulnerability include immediate patching of the lattelnet service or complete removal of the service from affected systems. Organizations should implement network segmentation to prevent unauthorized access to systems running vulnerable versions of Ultrix. The use of network monitoring tools can help detect exploitation attempts by monitoring for unusual network traffic patterns associated with the lattelnet service. Additionally, implementing strict access controls and disabling unnecessary network services reduces the attack surface. Security administrators should also consider migrating affected systems to supported operating systems or implementing virtualization layers to isolate legacy applications from critical network infrastructure. This vulnerability demonstrates the importance of maintaining up-to-date security patches and proper service management in preventing privilege escalation attacks. The ATT&CK framework categorizes this under privilege escalation techniques, specifically targeting the use of services with elevated privileges for unauthorized access.