CVE-2023-29337 in NuGet
Summary
by MITRE • 06/14/2023
NuGet Client Remote Code Execution Vulnerability
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Analysis
by VulDB Data Team • 06/11/2026
The NuGet client remote code execution vulnerability represents a critical security flaw in the popular .net package management system that enables attackers to execute arbitrary code on affected systems. This vulnerability stems from insufficient input validation within the NuGet client software, particularly when processing package metadata and dependencies during installation operations. The flaw allows malicious actors to craft specially crafted packages that, when installed, trigger code execution on the target system without proper user consent or awareness.
The technical implementation of this vulnerability involves the manipulation of package manifests and dependency resolution mechanisms within the NuGet ecosystem. Attackers can exploit this by creating packages that contain malicious code within their metadata fields, script execution components, or dependency chains that bypass normal security checks. The vulnerability specifically affects the client-side package installation process where the NuGet client downloads and processes package contents without adequate sanitization of potentially harmful elements. This flaw operates at the intersection of package management security and software supply chain integrity, making it particularly dangerous in enterprise environments where automated package installations are common.
The operational impact of this vulnerability extends far beyond individual system compromise, as it can enable attackers to establish persistent access, escalate privileges, and move laterally within network environments. Once executed, the malicious code can install backdoors, exfiltrate sensitive data, or serve as a foothold for further attacks. The vulnerability affects multiple versions of the NuGet client across different operating systems and development environments, making it a widespread concern for organizations relying on .net package management. Security researchers have identified that this vulnerability can be exploited through various attack vectors including compromised package repositories, malicious package uploads, or supply chain attacks targeting legitimate package maintainers.
Organizations should implement immediate mitigations including updating to patched versions of NuGet client software, implementing package signature validation, and establishing secure package repository policies. The vulnerability aligns with CWE-471, which addresses the improper update of pointers, and maps to ATT&CK technique T1195.002 for supplying chain attacks. Additional defensive measures include implementing network segmentation, monitoring package installation activities, and conducting regular security assessments of package dependencies. System administrators should also consider implementing automated package integrity checks and establishing secure development practices that include code signing verification for all packages before deployment. The vulnerability underscores the importance of supply chain security and the critical need for robust package management security controls in modern software development environments.