Vulnerabilities (CVE)

Filtered by vendor Envoyproxy Subscribe
Filtered by product Envoy
Total 69 CVE
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2019-18802 1 Envoyproxy 1 Envoy 2023-12-10 7.5 HIGH 9.8 CRITICAL
An issue was discovered in Envoy 1.12.0. An untrusted remote client may send an HTTP header (such as Host) with whitespace after the header content. Envoy will treat "header-value " as a different string from "header-value" so for example with the Host header "example.com " one could bypass "example.com" matchers.
CVE-2019-18836 2 Envoyproxy, Istio 2 Envoy, Istio 2023-12-10 5.0 MEDIUM 7.5 HIGH
Envoy 1.12.0 allows a remote denial of service because of resource loops, as demonstrated by a single idle TCP connection being able to keep a worker thread in an infinite busy loop when continue_on_listener_filters_timeout is used."
CVE-2020-8660 1 Envoyproxy 1 Envoy 2023-12-10 5.0 MEDIUM 5.3 MEDIUM
CNCF Envoy through 1.13.0 TLS inspector bypass. TLS inspector could have been bypassed (not recognized as a TLS client) by a client using only TLS 1.3. Because TLS extensions (SNI, ALPN) were not inspected, those connections might have been matched to a wrong filter chain, possibly bypassing some security restrictions in the process.
CVE-2019-15226 1 Envoyproxy 1 Envoy 2023-12-10 7.8 HIGH 7.5 HIGH
Upon receiving each incoming request header data, Envoy will iterate over existing request headers to verify that the total size of the headers stays below a maximum limit. The implementation in versions 1.10.0 through 1.11.1 for HTTP/1.x traffic and all versions of Envoy for HTTP/2 traffic had O(n^2) performance characteristics. A remote attacker may craft a request that stays below the maximum request header size but consists of many thousands of small headers to consume CPU and result in a denial-of-service attack.
CVE-2019-18801 1 Envoyproxy 1 Envoy 2023-12-10 7.5 HIGH 9.8 CRITICAL
An issue was discovered in Envoy 1.12.0. An untrusted remote client may send HTTP/2 requests that write to the heap outside of the request buffers when the upstream is HTTP/1. This may be used to corrupt nearby heap contents (leading to a query-of-death scenario) or may be used to bypass Envoy's access control mechanisms such as path based routing. An attacker can also modify requests from other users that happen to be proximal temporally and spatially.
CVE-2019-18838 1 Envoyproxy 1 Envoy 2023-12-10 5.0 MEDIUM 7.5 HIGH
An issue was discovered in Envoy 1.12.0. Upon receipt of a malformed HTTP request without a Host header, it sends an internally generated "Invalid request" response. This internally generated response is dispatched through the configured encoder filter chain before being sent to the client. An encoder filter that invokes route manager APIs that access a request's Host header causes a NULL pointer dereference, resulting in abnormal termination of the Envoy process.
CVE-2019-9901 1 Envoyproxy 1 Envoy 2023-12-10 7.5 HIGH 10.0 CRITICAL
Envoy 1.9.0 and before does not normalize HTTP URL paths. A remote attacker may craft a relative path, e.g., something/../admin, to bypass access control, e.g., a block on /admin. A backend server could then interpret the non-normalized path and provide an attacker access beyond the scope provided for by the access control policy.
CVE-2019-15225 1 Envoyproxy 1 Envoy 2023-12-10 5.0 MEDIUM 7.5 HIGH
In Envoy through 1.11.1, users may configure a route to match incoming path headers via the libstdc++ regular expression implementation. A remote attacker may send a request with a very long URI to result in a denial of service (memory consumption). This is a related issue to CVE-2019-14993.
CVE-2019-9900 2 Envoyproxy, Redhat 2 Envoy, Openshift Service Mesh 2023-12-10 7.5 HIGH 8.3 HIGH
When parsing HTTP/1.x header values, Envoy 1.9.0 and before does not reject embedded zero characters (NUL, ASCII 0x0). This allows remote attackers crafting header values containing embedded NUL characters to potentially bypass header matching rules, gaining access to unauthorized resources.