CVE-1999-0135 in Solaris
Summary
by MITRE
admintool in solaris allows a local user to write to arbitrary files and gain root access.
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Analysis
by VulDB Data Team • 04/03/2025
The vulnerability identified as CVE-1999-0135 resides within the admintool utility distributed with solaris operating systems, representing a critical local privilege escalation flaw that has significant implications for system security. This vulnerability specifically targets the administrative tooling component of the solaris ecosystem, where improper file access controls and privilege handling mechanisms create exploitable conditions for local attackers. The flaw manifests in the tool's ability to manipulate file permissions and ownership, allowing unauthorized users to write to files that should normally be restricted to root access only. This represents a fundamental breakdown in the principle of least privilege that underpins secure system design and administration.
The technical implementation of this vulnerability stems from inadequate input validation and insufficient access control mechanisms within the admintool utility. When executed with elevated privileges, the tool fails to properly verify file permissions or validate the target file paths, creating opportunities for malicious local users to manipulate file system objects through carefully crafted inputs. The vulnerability operates at the kernel level in many cases, leveraging the tool's inherent privilege escalation capabilities to bypass normal security boundaries. This flaw aligns with CWE-276, which addresses improper file permissions and inadequate access control, and demonstrates how administrative utilities can become attack vectors when proper privilege separation is not maintained. The exploitability of this vulnerability is particularly concerning as it requires only local user access to potentially achieve full system compromise through root privilege escalation.
The operational impact of CVE-1999-0135 extends far beyond simple local privilege escalation, as successful exploitation can lead to complete system compromise and unauthorized access to sensitive data. Once a local attacker gains root access through this vulnerability, they can modify critical system files, install backdoors, monitor network traffic, and establish persistent access to the compromised system. The vulnerability's presence in the solaris administration tooling creates a persistent threat vector that can be exploited across multiple system configurations, particularly in environments where administrators rely heavily on automated tools for system management. This vulnerability also demonstrates the broader category of privilege escalation flaws that are catalogued under the ATT&CK framework's privilege escalation tactics, specifically targeting the 'Local Privilege Escalation' technique. The impact is particularly severe in enterprise environments where solaris systems may host sensitive data or critical infrastructure components, as the vulnerability could enable attackers to gain unauthorized access to mission-critical systems.
Mitigation strategies for CVE-1999-0135 should focus on immediate patching and access control hardening measures to prevent exploitation. System administrators should ensure that all solaris systems are updated with the latest security patches provided by sun microsystems, which address the underlying file permission and access control issues within the admintool utility. Additionally, implementing strict file permission controls and monitoring for unauthorized file modifications can help detect exploitation attempts. The vulnerability highlights the importance of regular security assessments and proper privilege management, aligning with security best practices outlined in frameworks such as the CIS benchmarks and NIST cybersecurity guidelines. Organizations should also consider implementing privileged access management solutions to limit the scope of potential exploitation and reduce the attack surface for similar vulnerabilities. Regular security audits of administrative tools and utilities should be conducted to identify and remediate similar access control flaws that could potentially enable privilege escalation attacks.