CVE-2025-20901 in Blockchain Keystore
Summary
by MITRE • 02/04/2025
Out-of-bounds read in Blockchain Keystore prior to version 1.3.16.5 allows local privileged attackers to read out-of-bounds memory.
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Analysis
by VulDB Data Team • 07/17/2025
The vulnerability identified as CVE-2025-20901 represents a critical out-of-bounds read flaw within the Blockchain Keystore component of a widely deployed cryptographic software solution. This issue affects versions prior to 1.3.16.5 and exposes systems to potential exploitation by locally privileged attackers who can leverage this weakness to access memory locations outside the intended boundaries of the application's data structures. The vulnerability stems from insufficient input validation and boundary checking mechanisms within the keystore's memory management routines, creating an exploitable condition that could lead to unauthorized data access or system compromise.
The technical implementation of this vulnerability manifests through improper bounds checking during memory operations within the keystore's cryptographic key handling processes. When the application processes certain input data or performs key derivation operations, it fails to validate that memory access requests remain within allocated buffer boundaries. This flaw allows an attacker with local privileged access to craft malicious inputs or manipulate existing data structures in such a way that memory reads extend beyond the intended memory regions. The out-of-bounds read condition typically occurs during operations involving key storage, retrieval, or cryptographic processing where the software assumes certain data sizes or structures without proper validation. This type of vulnerability falls under the common weakness enumeration CWE-129 and represents a specific instance of improper input validation that can lead to information disclosure or further exploitation opportunities.
The operational impact of this vulnerability extends beyond simple information disclosure, as local privileged attackers can potentially extract sensitive cryptographic material or system information from memory locations that should remain protected. The implications are particularly severe in blockchain environments where keystore components handle critical cryptographic keys and sensitive data. Attackers could leverage this vulnerability to access private keys, encryption parameters, or other confidential information stored within the application's memory space. The local privileged requirement suggests that attackers must already have elevated system access, but this does not diminish the severity as such access often provides a foothold for further system compromise. This vulnerability aligns with attack patterns documented in the attack tree framework where initial access leads to privilege escalation and data exfiltration, potentially enabling complete system compromise.
Mitigation strategies for CVE-2025-20901 should prioritize immediate patching to version 1.3.16.5 or later, which contains the necessary fixes for the out-of-bounds read conditions. Organizations should implement comprehensive memory safety checks and boundary validation mechanisms throughout their cryptographic software components to prevent similar issues from arising in the future. Regular security assessments of cryptographic libraries and keystore implementations should be conducted to identify potential memory corruption vulnerabilities. System administrators should monitor for unauthorized local access attempts and implement proper access controls to limit the potential impact of such vulnerabilities. The fix typically involves implementing proper input validation, bounds checking, and memory management practices that align with secure coding guidelines and industry standards for cryptographic software development. Additionally, organizations should consider implementing memory protection mechanisms such as address space layout randomization and stack canaries to further reduce the exploitability of similar vulnerabilities.