Deep SSL/TLS Vulnerability Test
This report provides a deep analysis of the SSL/TLS configuration of t1.kakaocdn.net. It checks for protocol support, cipher strength, and known vulnerabilities.
Scan Results
Testing all IP addresses (port 443): 23.47.72.81 23.47.72.74 ----------------------------------------------------- Start 2026-08-21 14:35:37 -->> 23.47.72.81:443 (t1.kakaocdn.net) <<-- Further IP addresses: 23.47.72.74 2600:1407:7400:3d::17d4:6ea 2600:1407:7400:3d::17d4:6f2 rDNS (23.47.72.81): a23-47-72-81.deploy.static.akamaitechnologies.com. Service detected: HTTP Testing for server implementation bugs No bugs found. Testing HTTP header response @ "/" HTTP Status Code 403 Forbidden HTTP clock skew 0 sec from localtime Strict Transport Security not offered Public Key Pinning -- Server banner AkamaiGHost Application banner -- Cookie(s) (none issued at "/") -- HTTP status 403 signals you maybe missed the web application Security headers Access-Control-Allow-Origin: * Reverse Proxy banner -- Testing vulnerabilities Secure Renegotiation (RFC 5746) supported (OK) Secure Client-Initiated Renegotiation not vulnerable (OK) CRIME, TLS (CVE-2012-4929) not vulnerable (OK) BREACH (CVE-2013-3587) no gzip/deflate/compress/br HTTP compression (OK) - only supplied "/" tested POODLE, SSL (CVE-2014-3566) not vulnerable (OK) TLS_FALLBACK_SCSV (RFC 7507) Downgrade attack prevention supported (OK) SWEET32 (CVE-2016-2183, CVE-2016-6329) not vulnerable (OK) FREAK (CVE-2015-0204) not vulnerable (OK) DROWN (CVE-2016-0800, CVE-2016-0703) not vulnerable on this host and port (OK) make sure you don't use this certificate elsewhere with SSLv2 enabled services, see https://search.censys.io/search?resource=hosts&virtual_hosts=INCLUDE&q=C7880982ABA6559954B669BADB22009A2EA0218A8AA7F633EBF4085BE699D15F LOGJAM (CVE-2015-4000), experimental not vulnerable (OK): no DH EXPORT ciphers, no DH key detected with <= TLS 1.2 BEAST (CVE-2011-3389) TLS1: ECDHE-RSA-AES256-SHA ECDHE-RSA-AES128-SHA AES256-SHA AES128-SHA VULNERABLE -- but also supports higher protocols TLSv1.1 TLSv1.2 (likely mitigated) LUCKY13 (CVE-2013-0169), experimental potentially VULNERABLE, uses obsolete cipher block chaining ciphers with TLS, see server prefs. Winshock (CVE-2014-6321), experimental not vulnerable (OK) RC4 (CVE-2013-2566, CVE-2015-2808) no RC4 ciphers detected (OK) Done 2026-08-21 14:36:17 [ 50s] -->> 23.47.72.81:443 (t1.kakaocdn.net) <<-- ----------------------------------------------------- Start 2026-08-21 14:36:17 -->> 23.47.72.74:443 (t1.kakaocdn.net) <<-- Further IP addresses: 23.47.72.81 2600:1407:7400:3d::17d4:6ea 2600:1407:7400:3d::17d4:6f2 rDNS (23.47.72.74): a23-47-72-74.deploy.static.akamaitechnologies.com. Service detected: HTTP Testing for server implementation bugs No bugs found. Testing HTTP header response @ "/" HTTP Status Code 403 Forbidden HTTP clock skew 0 sec from localtime Strict Transport Security not offered Public Key Pinning -- Server banner AkamaiGHost Application banner -- Cookie(s) (none issued at "/") -- HTTP status 403 signals you maybe missed the web application Security headers Access-Control-Allow-Origin: * Reverse Proxy banner -- Testing vulnerabilities Secure Renegotiation (RFC 5746) supported (OK) Secure Client-Initiated Renegotiation not vulnerable (OK) CRIME, TLS (CVE-2012-4929) not vulnerable (OK) BREACH (CVE-2013-3587) no gzip/deflate/compress/br HTTP compression (OK) - only supplied "/" tested POODLE, SSL (CVE-2014-3566) not vulnerable (OK) TLS_FALLBACK_SCSV (RFC 7507) Downgrade attack prevention supported (OK) SWEET32 (CVE-2016-2183, CVE-2016-6329) not vulnerable (OK) FREAK (CVE-2015-0204) not vulnerable (OK) DROWN (CVE-2016-0800, CVE-2016-0703) not vulnerable on this host and port (OK) make sure you don't use this certificate elsewhere with SSLv2 enabled services, see https://search.censys.io/search?resource=hosts&virtual_hosts=INCLUDE&q=C7880982ABA6559954B669BADB22009A2EA0218A8AA7F633EBF4085BE699D15F LOGJAM (CVE-2015-4000), experimental not vulnerable (OK): no DH EXPORT ciphers, no DH key detected with <= TLS 1.2 BEAST (CVE-2011-3389) TLS1: ECDHE-RSA-AES256-SHA ECDHE-RSA-AES128-SHA AES256-SHA AES128-SHA VULNERABLE -- but also supports higher protocols TLSv1.1 TLSv1.2 (likely mitigated) LUCKY13 (CVE-2013-0169), experimental potentially VULNERABLE, uses obsolete cipher block chaining ciphers with TLS, see server prefs. Winshock (CVE-2014-6321), experimental not vulnerable (OK) RC4 (CVE-2013-2566, CVE-2015-2808) no RC4 ciphers detected (OK) Done 2026-08-21 14:37:02 [ 95s] -->> 23.47.72.74:443 (t1.kakaocdn.net) <<-- ----------------------------------------------------- Done testing now all IP addresses (on port 443): 23.47.72.81 23.47.72.74
About this Scan
This scan uses testssl.sh to check for:
- Protocols: SSLv2, SSLv3, TLS 1.0, TLS 1.1, TLS 1.2, TLS 1.3
- Vulnerabilities: Heartbleed, POODLE, FREAK, Logjam, DROWN, etc.
- Cipher Suites: Weak ciphers, perfect forward secrecy (PFS) support.