SECURITY: Windows ODBC driver is affected by OpenSSL bug

Details

Detail name Value
Changelog Number 15823
Type Bug
Status Resolved
Affected Versions Exasol 7.1.0
Fix Versions Exasol 7.1.16
Resolution Date 2022-11-24

Description

Recently it was announced that due to a bug in some OpenSSL versions a buffer overrun can be triggered in X.509 certificate verification.
Our 7.1 Windows ODBC driver is using one of the affected OpenSSL versions.

Details on the OpenSSL vulnerability can be found here:
https://nvd.nist.gov/vuln/detail/CVE-2022-3786
https://nvd.nist.gov/vuln/detail/CVE-2022-3602

Workaround

There are several options:

  • Use the fingerprint to establish a connection
  • Set SSLCERTIFICATE to SSL_VERIFY_NONE to use a secure TLS connection but without validating the certificate
  • Set LegacyEncryption to Y to fallback to ChaCha encryption instead of TLS

Fix

The Windows ODBC driver is using a new OpenSSL version that is not affected by this vulnerability.