CVE-2009-0124: Arrl Tqsllib

Medium severity, CVSS 5.0. EPSS: 1.3% chance of exploitation in the next 30 days.

The tqsl_verifyDataBlock function in openssl_cert.cpp in American Radio Relay League (ARRL) tqsllib 2.0 does not properly check the return value from the OpenSSL EVP_VerifyFinal function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature, a similar vulnerability to CVE-2008-5077.

Affected products

• Arrl Tqsllib: version 2.0 only

Published 2009-01-15. Last modified 2026-06-16.