GHSA-7774-7VR3-CC8J Authorization Policy Bypass Due to Case Insensitive Host Comparison

Impact According to RFC 4343, Istio authorization policy should compare the hostname in the HTTP Host header in a case insensitive way, but currently the comparison is case sensitive. The Envoy proxy will route the request hostname in a case-insensitive way which means the authorization policy...

Improper Handling of Case Sensitivity

Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. According to RFC 4343, Istio authorization policy should compare the hostname in the HTTP Host header in a case...

Improper Handling of Case Sensitivity

Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. According to RFC 4343, Istio authorization policy should compare the hostname in the HTTP Host header in a case...

Privilege Escalation

Istio is vulnerable to privilege escalation. The vulnerability exists due to case insensitive when authorizing hostname in the HTTP Host header...

CVE-2021-39155

Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. According to RFC 4343, Istio authorization policy should compare the hostname in the HTTP Host header in a case...

CVE-2021-39155: Improper Handling of Case Sensitivity

Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. According to RFC 4343, Istio authorization policy should compare the hostname in the HTTP Host header in a case...

Authorization Bypass

haproxy is vulnerable to authorization bypass. Lack of validation of the HTTP Host header could potentially result in bypass of access controls due to a mishandling of the Host and authority...

CVE-2021-39242

haproxy was found to be vulnerable to HTTP host header attack: This problem creates a scenario in which it's possible to drop the Host header and use the authority only after forwarding to a second http2 layer, possibly causing two differing values of Host at a different stage. The highest threat...

Design/Logic Flaw

An issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. It can lead to a situation with an attacker-controlled HTTP Host header, because a mismatch between Host and authority is mishandled...

CVE-2021-39242

HAProxy contains a vulnerability (CVE-2021-39242) affecting 2.2 prior to 2.2.16, 2.3 prior to 2.3.13, and 2.4 prior to 2.4.3 where mismatch between Host and authority can allow an attacker-controlled HTTP Host header. Reports indicate this could enable manipulation of requests and potential impac...

CVE-2021-39242

An issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. It can lead to a situation with an attacker-controlled HTTP Host header, because a mismatch between Host and authority is mishandled...

CVE-2021-38751

A HTTP Host header attack exists in ExponentCMS 2.6 and below in /exponentconstants.php. A modified HTTP header can change links on the webpage to an arbitrary value, leading to a possible attack vector for MITM...

Hardcoded credentials

A HTTP Host header attack exists in ExponentCMS 2.6 and below in /exponentconstants.php. A modified HTTP header can change links on the webpage to an arbitrary value, leading to a possible attack vector for MITM...

CVE-2021-38751

A HTTP Host header attack exists in ExponentCMS 2.6 and below in /exponentconstants.php. A modified HTTP header can change links on the webpage to an arbitrary value, leading to a possible attack vector for MITM...

CVE-2021-38751

CVE-2021-38751 describes a host header injection in ExponentCMS 2.6 and earlier, exploitable via the file /exponent_constants.php. A crafted HTTP Host header can cause links on the page to be rewritten to arbitrary values, creating a potential MITM attack vector. The publicly referenced sources (...

CVE-2021-38751: Improper Encoding or Escaping of Output

A HTTP Host header attack exists in ExponentCMS 2.6 and below in /exponentconstants.php. A modified HTTP header can change links on the webpage to an arbitrary value, leading to a possible attack vector for MITM...

PT-2021-3936

Name of the Vulnerable Software and Affected Versions ExponentCMS versions 2.6 and below Description A HTTP Host header attack exists in ExponentCMS, allowing a modified HTTP header to change links on the webpage to an arbitrary value. This can lead to a possible attack vector for Man-in-the-Midd...

CVE-2021-36371

Emissary-Ingress formerly Ambassador API Gateway through 1.13.9 allows attackers to bypass client certificate requirements i.e., mTLS certrequired on backend upstreams when more than one TLSContext is defined and at least one configuration exists that does not require client certificate...

Design/Logic Flaw

Emissary-Ingress formerly Ambassador API Gateway through 1.13.9 allows attackers to bypass client certificate requirements i.e., mTLS certrequired on backend upstreams when more than one TLSContext is defined and at least one configuration exists that does not require client certificate...

CVE-2021-36371

CVE-2021-36371 is reported for Emissary-Ingress (formerly Ambassador API Gateway). The vulnerability allows bypassing client certificate requirements (mTLS cert_required) on backend upstreams when more than one TLSContext exists and any configuration does not require client cert authentication. T...