Deep SSL/TLS Vulnerability Test
This report provides a deep analysis of the SSL/TLS configuration of polyfill-fastly.io. It checks for protocol support, cipher strength, and known vulnerabilities.
Scan Results
Testing all IP addresses (port 443): 151.101.193.91 151.101.129.91 151.101.1.91 151.101.65.91 ----------------------------------------------------- Start 2026-03-02 21:39:14 -->> 151.101.193.91:443 (polyfill-fastly.io) <<-- Further IP addresses: 151.101.65.91 151.101.129.91 151.101.1.91 2a04:4e42:200::347 2a04:4e42:600::347 2a04:4e42:400::347 2a04:4e42::347 rDNS (151.101.193.91): -- Service detected: HTTP Testing for server implementation bugs No bugs found. Testing HTTP header response @ "/" HTTP Status Code 200 HTTP clock skew -1 sec from localtime Strict Transport Security 365 days=31536000 s, includeSubDomains, preload Public Key Pinning -- Server banner (no "Server" line in header, interesting!) Application banner -- Cookie(s) (none issued at "/") Security headers X-Content-Type-Options: nosniff X-XSS-Protection: 1; mode=block X-Served-By: cache-chi-klot8100147-CHI Referrer-Policy: origin-when-cross-origin Cache-Control: max-age=60, stale-while-revalidate=60, stale-if-error=86400 Reverse Proxy banner -- Testing vulnerabilities Secure Renegotiation (RFC 5746) supported (OK) Secure Client-Initiated Renegotiation not vulnerable (OK) -- mitigated (1 successful reneg within 10 in 33s(timeout)) CRIME, TLS (CVE-2012-4929) not vulnerable (OK) BREACH (CVE-2013-3587) potentially NOT ok, "br gzip" HTTP compression detected. - only supplied "/" tested Can be ignored for static pages or if no secrets in the page POODLE, SSL (CVE-2014-3566) not vulnerable (OK) TLS_FALLBACK_SCSV (RFC 7507) No fallback possible (OK), no protocol below TLS 1.2 offered 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=33DF8D85B90560A7D92F1FC80958FD03EB34F1540194F32F588C62F514053D11 LOGJAM (CVE-2015-4000), experimental not vulnerable (OK): no DH EXPORT ciphers, no DH key detected with <= TLS 1.2 BEAST (CVE-2011-3389) not vulnerable (OK), no SSL3 or TLS1 LUCKY13 (CVE-2013-0169), experimental not vulnerable (OK) Winshock (CVE-2014-6321), experimental not vulnerable (OK) RC4 (CVE-2013-2566, CVE-2015-2808) no RC4 ciphers detected (OK) Done 2026-03-02 21:40:35 [ 91s] -->> 151.101.193.91:443 (polyfill-fastly.io) <<-- ----------------------------------------------------- Start 2026-03-02 21:40:35 -->> 151.101.129.91:443 (polyfill-fastly.io) <<-- Further IP addresses: 151.101.65.91 151.101.193.91 151.101.1.91 2a04:4e42:200::347 2a04:4e42:600::347 2a04:4e42:400::347 2a04:4e42::347 rDNS (151.101.129.91): -- Service detected: HTTP Testing for server implementation bugs No bugs found. Testing HTTP header response @ "/" HTTP Status Code 200 HTTP clock skew 0 sec from localtime Strict Transport Security 365 days=31536000 s, includeSubDomains, preload Public Key Pinning -- Server banner (no "Server" line in header, interesting!) Application banner -- Cookie(s) (none issued at "/") Security headers X-Content-Type-Options: nosniff X-XSS-Protection: 1; mode=block X-Served-By: cache-chi-kigq8000133-CHI Referrer-Policy: origin-when-cross-origin Cache-Control: max-age=60, stale-while-revalidate=60, stale-if-error=86400 Reverse Proxy banner -- Testing vulnerabilities Secure Renegotiation (RFC 5746) supported (OK) Secure Client-Initiated Renegotiation not vulnerable (OK) -- mitigated (1 successful reneg within 10 in 33s(timeout)) CRIME, TLS (CVE-2012-4929) not vulnerable (OK) BREACH (CVE-2013-3587) potentially NOT ok, "br gzip" HTTP compression detected. - only supplied "/" tested Can be ignored for static pages or if no secrets in the page POODLE, SSL (CVE-2014-3566) not vulnerable (OK) TLS_FALLBACK_SCSV (RFC 7507) No fallback possible (OK), no protocol below TLS 1.2 offered 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=33DF8D85B90560A7D92F1FC80958FD03EB34F1540194F32F588C62F514053D11 LOGJAM (CVE-2015-4000), experimental not vulnerable (OK): no DH EXPORT ciphers, no DH key detected with <= TLS 1.2 BEAST (CVE-2011-3389) not vulnerable (OK), no SSL3 or TLS1 LUCKY13 (CVE-2013-0169), experimental not vulnerable (OK) Winshock (CVE-2014-6321), experimental not vulnerable (OK) RC4 (CVE-2013-2566, CVE-2015-2808) no RC4 ciphers detected (OK) Done 2026-03-02 21:41:56 [ 172s] -->> 151.101.129.91:443 (polyfill-fastly.io) <<-- ----------------------------------------------------- Start 2026-03-02 21:41:57 -->> 151.101.1.91:443 (polyfill-fastly.io) <<-- Further IP addresses: 151.101.65.91 151.101.193.91 151.101.129.91 2a04:4e42:200::347 2a04:4e42:600::347 2a04:4e42:400::347 2a04:4e42::347 rDNS (151.101.1.91): -- Service detected: HTTP Testing for server implementation bugs No bugs found. Testing HTTP header response @ "/" HTTP Status Code 200 HTTP clock skew 0 sec from localtime Strict Transport Security 365 days=31536000 s, includeSubDomains, preload Public Key Pinning -- Server banner (no "Server" line in header, interesting!) Application banner -- Cookie(s) (none issued at "/") Security headers X-Content-Type-Options: nosniff X-XSS-Protection: 1; mode=block X-Served-By: cache-chi-kigq8000038-CHI Referrer-Policy: origin-when-cross-origin Cache-Control: max-age=60, stale-while-revalidate=60, stale-if-error=86400 Reverse Proxy banner -- Testing vulnerabilities Secure Renegotiation (RFC 5746) supported (OK) Secure Client-Initiated Renegotiation not vulnerable (OK) -- mitigated (1 successful reneg within 10 in 33s(timeout)) CRIME, TLS (CVE-2012-4929) not vulnerable (OK) BREACH (CVE-2013-3587) potentially NOT ok, "br gzip" HTTP compression detected. - only supplied "/" tested Can be ignored for static pages or if no secrets in the page POODLE, SSL (CVE-2014-3566) not vulnerable (OK) TLS_FALLBACK_SCSV (RFC 7507) No fallback possible (OK), no protocol below TLS 1.2 offered 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=33DF8D85B90560A7D92F1FC80958FD03EB34F1540194F32F588C62F514053D11 LOGJAM (CVE-2015-4000), experimental not vulnerable (OK): no DH EXPORT ciphers, no DH key detected with <= TLS 1.2 BEAST (CVE-2011-3389) not vulnerable (OK), no SSL3 or TLS1 LUCKY13 (CVE-2013-0169), experimental not vulnerable (OK) Winshock (CVE-2014-6321), experimental not vulnerable (OK) RC4 (CVE-2013-2566, CVE-2015-2808) no RC4 ciphers detected (OK) Done 2026-03-02 21:43:32 [ 268s] -->> 151.101.1.91:443 (polyfill-fastly.io) <<-- ----------------------------------------------------- Start 2026-03-02 21:43:32 -->> 151.101.65.91:443 (polyfill-fastly.io) <<-- Further IP addresses: 151.101.193.91 151.101.129.91 151.101.1.91 2a04:4e42:200::347 2a04:4e42:600::347 2a04:4e42:400::347 2a04:4e42::347 rDNS (151.101.65.91): -- Service detected: HTTP Testing for server implementation bugs No bugs found. Testing HTTP header response @ "/" HTTP Status Code 200 HTTP clock skew 0 sec from localtime Strict Transport Security 365 days=31536000 s, includeSubDomains, preload Public Key Pinning -- Server banner (no "Server" line in header, interesting!) Application banner -- Cookie(s) (none issued at "/") Security headers X-Content-Type-Options: nosniff X-XSS-Protection: 1; mode=block X-Served-By: cache-chi-klot8100022-CHI Referrer-Policy: origin-when-cross-origin Cache-Control: max-age=60, stale-while-revalidate=60, stale-if-error=86400 Reverse Proxy banner -- Testing vulnerabilities Secure Renegotiation (RFC 5746) supported (OK) Secure Client-Initiated Renegotiation not vulnerable (OK) -- mitigated (1 successful reneg within 10 in 33s(timeout)) CRIME, TLS (CVE-2012-4929) not vulnerable (OK) BREACH (CVE-2013-3587) potentially NOT ok, "br gzip" HTTP compression detected. - only supplied "/" tested Can be ignored for static pages or if no secrets in the page POODLE, SSL (CVE-2014-3566) not vulnerable (OK) TLS_FALLBACK_SCSV (RFC 7507) No fallback possible (OK), no protocol below TLS 1.2 offered 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=33DF8D85B90560A7D92F1FC80958FD03EB34F1540194F32F588C62F514053D11 LOGJAM (CVE-2015-4000), experimental not vulnerable (OK): no DH EXPORT ciphers, no DH key detected with <= TLS 1.2 BEAST (CVE-2011-3389) not vulnerable (OK), no SSL3 or TLS1 LUCKY13 (CVE-2013-0169), experimental not vulnerable (OK) Winshock (CVE-2014-6321), experimental not vulnerable (OK) RC4 (CVE-2013-2566, CVE-2015-2808) no RC4 ciphers detected (OK) Done 2026-03-02 21:44:58 [ 354s] -->> 151.101.65.91:443 (polyfill-fastly.io) <<-- ----------------------------------------------------- Done testing now all IP addresses (on port 443): 151.101.193.91 151.101.129.91 151.101.1.91 151.101.65.91
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.