CVE-2023-34363: DataDirect ODBC Oracle Driver Disclosure

CVE-2023-34363 Overview

CVE-2023-34363 is a cryptographic vulnerability affecting Progress DataDirect Connect for ODBC before version 08.02.2770 for Oracle. The vulnerability stems from an insecure random number generation flaw (CWE-338) that occurs during Oracle Advanced Security (OAS) encryption initialization. When an error is encountered while initializing the primary encryption object, the code falls back to an alternative encryption mechanism that relies on a predictable random number generator to create the private key. This weakness could allow a well-positioned network attacker to predict the generated key material and subsequently decrypt traffic between the ODBC driver and the Oracle database server.

Critical Impact

A network attacker who can observe encrypted traffic between the ODBC driver and Oracle database may be able to predict the weak encryption key and decrypt sensitive database communications, potentially exposing confidential data including credentials and query results.

Affected Products

• Progress DataDirect ODBC Oracle Wire Protocol Driver (versions before 08.02.2770)
• Systems using Oracle Advanced Security (OAS) encryption without SSL/TLS

Discovery Timeline

• 2023-06-09 - CVE-2023-34363 published to NVD
• 2025-01-06 - Last updated in NVD database

Technical Details for CVE-2023-34363

Vulnerability Analysis

This vulnerability represents an insecure random number generation weakness in the cryptographic implementation of Progress DataDirect's ODBC Oracle Wire Protocol Driver. The flaw is triggered during a specific error condition: when the driver attempts to initialize Oracle Advanced Security (OAS) encryption and encounters an initialization failure. Rather than failing securely or propagating the error, the code implements a fallback mechanism that uses a cryptographically weak pseudo-random number generator (PRNG) to create the private key material for the encryption session.

The use of a predictable PRNG for cryptographic key generation fundamentally undermines the security guarantees of the encryption scheme. A well-positioned attacker who can observe the encrypted network traffic between the driver and database server may be able to determine the seed or internal state of the weak random number generator, predict the sequence of random values produced, and ultimately derive the private key used for the session encryption.

Importantly, this vulnerability does not affect deployments that use SSL/TLS encryption for the database connection, as SSL/TLS implements its own secure key exchange mechanisms that do not rely on the vulnerable fallback code path.

Root Cause

The root cause of CVE-2023-34363 is the use of an insecure pseudo-random number generator (PRNG) in the encryption fallback path. When OAS encryption initialization fails, the fallback mechanism does not employ a cryptographically secure random number generator (CSPRNG) to produce the private key material. Instead, it uses a predictable algorithm that may produce deterministic or easily guessable output, violating fundamental requirements for cryptographic key generation.

This represents a violation of CWE-338 (Use of Cryptographically Weak Pseudo-Random Number Generator), which indicates that software uses a PRNG that is not cryptographically strong in a security context where unpredictability is required.

Attack Vector

The attack vector for this vulnerability is network-based, requiring the attacker to have the ability to intercept and observe encrypted traffic between the vulnerable ODBC driver and the Oracle database server. The attack scenario involves several conditions:

1. The target system must be using Progress DataDirect Connect for ODBC with Oracle (version before 08.02.2770)
2. The connection must be configured to use Oracle Advanced Security (OAS) encryption rather than SSL/TLS
3. An error condition must trigger the fallback to the insecure encryption mechanism
4. The attacker must have network access to observe the encrypted traffic

Once these conditions are met, a sophisticated attacker could analyze the encrypted traffic, attempt to predict the random number generator output, derive the session encryption key, and decrypt the captured database communications to access sensitive data including credentials, queries, and query results.

Detection Methods for CVE-2023-34363

Indicators of Compromise

• Unusual network traffic patterns between ODBC clients and Oracle database servers
• Evidence of passive network monitoring or traffic capture near database communication paths
• Unexpected encryption error logs in DataDirect ODBC driver diagnostics that may indicate fallback encryption activation
• Signs of credential compromise or unauthorized database access without corresponding authentication logs

Detection Strategies

• Inventory all systems using Progress DataDirect ODBC Oracle Wire Protocol Driver and verify version numbers against the vulnerable version range (before 08.02.2770)
• Review ODBC connection configurations to identify systems using OAS encryption instead of SSL/TLS
• Monitor for encryption initialization errors in driver logs that could trigger the vulnerable fallback path
• Implement network monitoring to detect suspicious traffic analysis activities near database infrastructure

Monitoring Recommendations

• Enable verbose logging on DataDirect ODBC drivers to capture encryption initialization events and potential fallback triggers
• Deploy network intrusion detection systems (NIDS) to monitor for passive traffic capture activities in database network segments
• Implement database activity monitoring to detect unauthorized access that may result from compromised encryption
• Regularly audit ODBC driver configurations across the environment to ensure SSL/TLS is enforced

How to Mitigate CVE-2023-34363

Immediate Actions Required

• Upgrade Progress DataDirect Connect for ODBC to version 08.02.2770 or later immediately
• Reconfigure all affected ODBC connections to use SSL/TLS encryption instead of Oracle Advanced Security (OAS) encryption
• Audit all systems using DataDirect ODBC Oracle Wire Protocol Driver to identify vulnerable deployments
• Review network security controls to ensure database traffic is protected against passive interception

Patch Information

Progress has released a security update addressing this vulnerability. Organizations should upgrade to DataDirect Connect for ODBC version 08.02.2770 or later. Detailed information about the security fix is available in the Progress Security Vulnerabilities Report. After applying the patch, verify that the encryption mechanism functions correctly and does not fall back to the insecure implementation.

Workarounds

• Configure ODBC connections to use SSL/TLS encryption instead of Oracle Advanced Security (OAS), which completely bypasses the vulnerable code path
• Implement network segmentation to isolate database traffic and reduce the attack surface for passive eavesdropping
• Deploy VPN or other encrypted tunnels for database communications as an additional layer of protection
• Restrict network access to database servers to minimize the potential for traffic interception by attackers

# Example: Configure SSL/TLS for DataDirect ODBC connection
# In your ODBC connection string or DSN configuration, enable SSL/TLS:
# EncryptionMethod=SSL
# TrustStore=/path/to/truststore
# TrustStorePassword=your_password
# ValidateServerCertificate=1