CVE-2018-10932 in lldptool
Summary
by MITRE
lldptool version 1.0.1 and older can print a raw, unsanitized attacker controlled buffer when mngAddr information is displayed. This may allow an attacker to inject shell control characters into the buffer and impact the behavior of the terminal.
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Analysis
by VulDB Data Team • 05/04/2023
The vulnerability identified as CVE-2018-10932 affects lldptool version 1.0.1 and earlier implementations, representing a significant security flaw in network device management utilities. This issue stems from improper input validation and sanitization within the tool's handling of management address information, creating a potential attack vector that could compromise system integrity and terminal behavior. The vulnerability specifically manifests when the tool processes and displays mngAddr information, exposing it to malicious input manipulation.
The technical flaw resides in the lldptool's failure to properly sanitize user-controlled input before displaying it within terminal contexts. When the tool encounters management address data, it directly incorporates unsanitized buffer content into its output without adequate filtering or escaping mechanisms. This creates a condition where an attacker can craft malicious input containing shell control characters that get interpreted by the terminal during display operations. The vulnerability operates at the intersection of input processing and output rendering, where raw data flows directly from external sources into display contexts without proper security mediation.
This vulnerability presents substantial operational impact across network infrastructure management systems that rely on lldptool for device discovery and management. Attackers could potentially leverage this flaw to execute terminal command injection attacks, where maliciously crafted management address information could trigger unintended shell behaviors. The implications extend beyond simple display corruption, as terminal command injection could enable attackers to escalate privileges, execute arbitrary commands, or gain unauthorized access to network management interfaces. The attack surface is particularly concerning in enterprise environments where lldptool is used for network device monitoring and configuration management.
The vulnerability maps to CWE-74, which describes "Improper Neutralization of Special Elements in Output Used by a Downstream Component," and aligns with ATT&CK technique T1059.004 for command and scripting interpreter. Organizations using affected versions of lldptool should immediately implement mitigation strategies including upgrading to patched versions, implementing input validation controls, and monitoring for suspicious management address data patterns. Network administrators should also consider isolating lldptool usage in restricted environments and implementing additional security controls around terminal access and command execution. The remediation process requires careful consideration of backward compatibility while ensuring complete sanitization of all user-controlled inputs before terminal rendering operations.