CVE-2017-10669 in OSCI Transport Library
Summary
by MITRE
Signature Wrapping exists in OSCI-Transport 1.2 as used in OSCI Transport Library 1.6.1 (Java) and OSCI Transport Library 1.6 (.NET). An attacker with access to unencrypted OSCI protocol messages must send crafted protocol messages with duplicate IDs.
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Analysis
by VulDB Data Team • 10/21/2019
The vulnerability identified as CVE-2017-10669 represents a significant security flaw in the OSCI-Transport protocol implementation across both Java and .NET environments. This issue manifests as a signature wrapping vulnerability that specifically affects OSCI Transport Library versions 1.6.1 for Java and 1.6 for .NET. The vulnerability stems from the protocol's insufficient handling of duplicate message identifiers within unencrypted communications, creating a potential attack vector that could compromise the integrity and authenticity of transmitted data. The flaw exists within the OSCI-Transport 1.2 specification and impacts the broader OSCI Transport Library ecosystem, making it a critical concern for organizations relying on this transport mechanism for secure communications.
The technical implementation of this vulnerability exploits the protocol's failure to properly validate or reject duplicate message IDs in unencrypted transport scenarios. When an attacker gains access to unencrypted OSCI protocol messages, they can craft malicious protocol messages that contain duplicate identifiers, effectively wrapping or manipulating the signature validation process. This manipulation occurs because the underlying transport library does not adequately distinguish between legitimate duplicate messages and maliciously crafted ones, allowing the attacker to potentially bypass signature verification mechanisms. The vulnerability specifically targets the signature validation logic within the transport layer, where duplicate ID handling creates a window for exploitation. This flaw aligns with CWE-312 (Sensitive Data Exposure) and CWE-311 (Missing Encryption of Sensitive Data) categories, as it exposes the protocol to manipulation of cryptographic signatures without proper validation of message integrity.
The operational impact of this vulnerability extends beyond simple data manipulation, as it fundamentally undermines the security assurances provided by the OSCI-Transport protocol's signature mechanisms. Organizations using affected versions of the OSCI Transport Library may experience unauthorized message injection, replay attacks, or signature spoofing scenarios that could compromise the authenticity of communications. The vulnerability is particularly concerning in environments where unencrypted communications are prevalent, as it requires minimal access privileges for exploitation. Attackers can leverage this weakness to manipulate transport layer security controls, potentially leading to broader system compromise through the exploitation of trust relationships established by the protocol's signature validation. This vulnerability directly impacts the protocol's ability to provide secure transport as defined in the OSCI Transport specification and could result in unauthorized data access or system compromise.
Mitigation strategies for CVE-2017-10669 should prioritize immediate upgrade to patched versions of the OSCI Transport Library where available, as this represents the most effective solution to address the root cause of the vulnerability. Organizations should implement network segmentation and encryption controls to prevent unauthorized access to unencrypted protocol messages, thereby reducing the attack surface for this specific vulnerability. Additional defensive measures include implementing robust message ID validation mechanisms, deploying monitoring systems to detect anomalous duplicate ID patterns, and establishing strict access controls for protocol message handling. Security teams should also consider implementing protocol-level integrity checks that can detect and reject malformed messages containing duplicate identifiers. The vulnerability's alignment with ATT&CK technique T1071.004 (Application Layer Protocol: DNS) and T1566 (Phishing) suggests that organizations should also strengthen their overall network security posture and implement comprehensive security awareness training to prevent unauthorized access to transport layer communications. Regular security assessments and vulnerability scanning should be conducted to ensure that all systems utilizing OSCI-Transport are properly secured against this and related signature wrapping vulnerabilities.