Deep SSL/TLS Vulnerability Test
This report provides a deep analysis of the SSL/TLS configuration of app.klaarhq.com. It checks for protocol support, cipher strength, and known vulnerabilities.
Scan Results
Testing all IP addresses (port 443): 18.154.110.112 18.154.110.63 18.154.110.42 18.154.110.7 ----------------------------------------------------- Start 2026-01-06 11:16:04 -->> 18.154.110.112:443 (app.klaarhq.com) <<-- Further IP addresses: 18.154.110.7 18.154.110.63 18.154.110.42 2600:9000:2506:f200:5:7d6c:9ac0:93a1 2600:9000:2506:8a00:5:7d6c:9ac0:93a1 2600:9000:2506:fc00:5:7d6c:9ac0:93a1 2600:9000:2506:4e00:5:7d6c:9ac0:93a1 2600:9000:2506:8600:5:7d6c:9ac0:93a1 2600:9000:2506:be00:5:7d6c:9ac0:93a1 2600:9000:2506:b600:5:7d6c:9ac0:93a1 2600:9000:2506:fa00:5:7d6c:9ac0:93a1 rDNS (18.154.110.112): server-18-154-110-112.ord58.r.cloudfront.net. Service detected: HTTP Testing for server implementation bugs No bugs found. Testing HTTP header response @ "/" HTTP Status Code 200 OK HTTP clock skew 0 sec from localtime HTTP Age (RFC 7234) 30 Strict Transport Security 365 days=31536000 s, just this domain Public Key Pinning -- Server banner CloudFront Application banner -- Cookie(s) (none issued at "/") Security headers X-Frame-Options: DENY X-Content-Type-Options: nosniff X-XSS-Protection: 1; mode=block Referrer-Policy: strict-origin-when-cross-origin Reverse Proxy banner X-Cache: Hit from cloudfront Via: 1.1 3e15e20983f10122d7332649559a0f8c.cloudfront.net (CloudFront) 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) 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=21F9D35D67DE7CFC579B7AF37E3B588414E999F8E726299AB440804E9806647E 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 2026-01-06 11:17:27 [ 93s] -->> 18.154.110.112:443 (app.klaarhq.com) <<-- ----------------------------------------------------- Start 2026-01-06 11:17:27 -->> 18.154.110.63:443 (app.klaarhq.com) <<-- Further IP addresses: 18.154.110.7 18.154.110.112 18.154.110.42 2600:9000:2506:f200:5:7d6c:9ac0:93a1 2600:9000:2506:8a00:5:7d6c:9ac0:93a1 2600:9000:2506:fc00:5:7d6c:9ac0:93a1 2600:9000:2506:4e00:5:7d6c:9ac0:93a1 2600:9000:2506:8600:5:7d6c:9ac0:93a1 2600:9000:2506:be00:5:7d6c:9ac0:93a1 2600:9000:2506:b600:5:7d6c:9ac0:93a1 2600:9000:2506:fa00:5:7d6c:9ac0:93a1 rDNS (18.154.110.63): server-18-154-110-63.ord58.r.cloudfront.net. Service detected: HTTP Testing for server implementation bugs No bugs found. Testing HTTP header response @ "/" HTTP Status Code 200 OK HTTP clock skew +1 sec from localtime HTTP Age (RFC 7234) 117 Strict Transport Security 365 days=31536000 s, just this domain Public Key Pinning -- Server banner CloudFront Application banner -- Cookie(s) (none issued at "/") Security headers X-Frame-Options: DENY X-Content-Type-Options: nosniff X-XSS-Protection: 1; mode=block Referrer-Policy: strict-origin-when-cross-origin Reverse Proxy banner X-Cache: Hit from cloudfront Via: 1.1 9f55fd8c516617ac4554ca1d243d55b8.cloudfront.net (CloudFront) 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) 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=21F9D35D67DE7CFC579B7AF37E3B588414E999F8E726299AB440804E9806647E 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 2026-01-06 11:18:38 [ 164s] -->> 18.154.110.63:443 (app.klaarhq.com) <<-- ----------------------------------------------------- Start 2026-01-06 11:18:38 -->> 18.154.110.42:443 (app.klaarhq.com) <<-- Further IP addresses: 18.154.110.7 18.154.110.112 18.154.110.63 2600:9000:2506:f200:5:7d6c:9ac0:93a1 2600:9000:2506:8a00:5:7d6c:9ac0:93a1 2600:9000:2506:fc00:5:7d6c:9ac0:93a1 2600:9000:2506:4e00:5:7d6c:9ac0:93a1 2600:9000:2506:8600:5:7d6c:9ac0:93a1 2600:9000:2506:be00:5:7d6c:9ac0:93a1 2600:9000:2506:b600:5:7d6c:9ac0:93a1 2600:9000:2506:fa00:5:7d6c:9ac0:93a1 rDNS (18.154.110.42): server-18-154-110-42.ord58.r.cloudfront.net. Service detected: HTTP Testing for server implementation bugs No bugs found. Testing HTTP header response @ "/" HTTP Status Code 200 OK HTTP clock skew +1 sec from localtime HTTP Age (RFC 7234) 186 Strict Transport Security 365 days=31536000 s, just this domain Public Key Pinning -- Server banner CloudFront Application banner -- Cookie(s) (none issued at "/") Security headers X-Frame-Options: DENY X-Content-Type-Options: nosniff X-XSS-Protection: 1; mode=block Referrer-Policy: strict-origin-when-cross-origin Reverse Proxy banner X-Cache: Hit from cloudfront Via: 1.1 d1b7c750b45b2751c2c1a34c2f5af9ec.cloudfront.net (CloudFront) 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) 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=21F9D35D67DE7CFC579B7AF37E3B588414E999F8E726299AB440804E9806647E 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 2026-01-06 11:19:57 [ 243s] -->> 18.154.110.42:443 (app.klaarhq.com) <<-- ----------------------------------------------------- Start 2026-01-06 11:19:57 -->> 18.154.110.7:443 (app.klaarhq.com) <<-- Further IP addresses: 18.154.110.112 18.154.110.63 18.154.110.42 2600:9000:2506:f200:5:7d6c:9ac0:93a1 2600:9000:2506:8a00:5:7d6c:9ac0:93a1 2600:9000:2506:fc00:5:7d6c:9ac0:93a1 2600:9000:2506:4e00:5:7d6c:9ac0:93a1 2600:9000:2506:8600:5:7d6c:9ac0:93a1 2600:9000:2506:be00:5:7d6c:9ac0:93a1 2600:9000:2506:b600:5:7d6c:9ac0:93a1 2600:9000:2506:fa00:5:7d6c:9ac0:93a1 rDNS (18.154.110.7): server-18-154-110-7.ord58.r.cloudfront.net. Service detected: HTTP Testing for server implementation bugs No bugs found. Testing HTTP header response @ "/" HTTP Status Code 200 OK HTTP clock skew +1 sec from localtime HTTP Age (RFC 7234) 267 Strict Transport Security 365 days=31536000 s, just this domain Public Key Pinning -- Server banner CloudFront Application banner -- Cookie(s) (none issued at "/") Security headers X-Frame-Options: DENY X-Content-Type-Options: nosniff X-XSS-Protection: 1; mode=block Referrer-Policy: strict-origin-when-cross-origin Reverse Proxy banner X-Cache: Hit from cloudfront Via: 1.1 0c1142fda8a7c24fdce4ee5e1ea199d2.cloudfront.net (CloudFront) 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) 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=21F9D35D67DE7CFC579B7AF37E3B588414E999F8E726299AB440804E9806647E 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 2026-01-06 11:21:24 [ 330s] -->> 18.154.110.7:443 (app.klaarhq.com) <<-- ----------------------------------------------------- Done testing now all IP addresses (on port 443): 18.154.110.112 18.154.110.63 18.154.110.42 18.154.110.7
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.