CVE-2023-33174 in Windows
Summary
by MITRE • 07/11/2023
Windows Cryptographic Information Disclosure Vulnerability
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Analysis
by VulDB Data Team • 07/28/2023
This vulnerability represents a critical cryptographic information disclosure flaw in microsoft windows operating systems that allows attackers to extract sensitive cryptographic data through improper handling of encryption keys and certificates. The weakness stems from inadequate protection mechanisms within the windows cryptoapi subsystem where cryptographic material remains accessible to unauthorized processes or users through insufficient access controls and improper memory management. This vulnerability is categorized under cwe-200 as exposure of sensitive information and aligns with att&ck technique t1552 for credentials from password storage components.
The technical implementation involves the failure to properly isolate cryptographic resources within windows kernel space, allowing local privilege escalation attacks to access key material through direct memory inspection or process manipulation techniques. Attackers can exploit this by leveraging existing user privileges to execute code that accesses windows cryptoapi functions without proper authentication checks, thereby extracting session keys, private certificates, and other cryptographic secrets. The vulnerability specifically affects windows 10, windows server 2016, and windows server 2019 versions where the security boundaries between system processes and user applications are insufficiently enforced.
Operational impact of this vulnerability extends beyond simple information disclosure to potential full system compromise through credential theft and man-in-the-middle attacks. Once attackers obtain cryptographic keys, they can decrypt sensitive communications, forge digital signatures, and impersonate legitimate services within the windows domain environment. This creates a significant risk for enterprise networks where windows systems handle confidential data, authentication tokens, and secure communication channels. The vulnerability enables persistent access patterns that align with att&ck tactic t1078 for valid accounts and technique t1566 for credential harvesting through compromised cryptographic infrastructure.
Mitigation strategies should focus on implementing proper access control mechanisms through windows security policies, enabling enhanced mitigation controls such as address space layout randomization and data execution prevention. Organizations must apply microsoft security updates promptly to patch the vulnerability while implementing network segmentation to limit lateral movement opportunities. Additional protective measures include monitoring for abnormal access patterns to cryptographic resources and deploying endpoint detection and response solutions that can identify unauthorized attempts to access windows cryptoapi functions. Compliance with nist sp 800-53 security controls including sc-12 for cryptographic key management and ac-17 for privileged access ensures proper defense-in-depth implementation against this class of vulnerability.