Vulnerabilities that (mostly) aren’t: LUCKY13

This post reassesses the LUCKY13 TLS/DTLS timing attack (CVE-2013-0169), noting it was an implementation flaw patched across major libraries in 2013 and now poses minimal risk in modern environments; accurate remote detection is rarely possible. It cautions that treating the mere availability of CBC cipher suites as evidence of vulnerability is misleading, and recommends disabling legacy CBC ciphers primarily to prioritize stronger TLS 1.2/1.3 options rather than to mitigate LUCKY13.