CVSS: 8.2EPSS: 0%CPEs: 4EXPL: 0CVE-2024-23326 – Envoy incorrectly accepts HTTP 200 response for entering upgrade mode
https://notcve.org/view.php?id=CVE-2024-23326
Envoy is a cloud-native, open source edge and service proxy. A theoretical request smuggling vulnerability exists through Envoy if a server can be tricked into adding an upgrade header into a response. Per RFC https://www.rfc-editor.org/rfc/rfc7230#section-6.7 a server sends 101 when switching protocols. Envoy incorrectly accepts a 200 response from a server when requesting a protocol upgrade, but 200 does not indicate protocol switch. This opens up the possibility of request smuggling through Envoy if the server can be tricked into adding the upgrade header to the response. • https://github.com/envoyproxy/envoy/security/advisories/GHSA-vcf8-7238-v74c • CWE-391: Unchecked Error Condition CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') •
CVSS: 7.5EPSS: 0%CPEs: 4EXPL: 0CVE-2024-32475 – Envoy RELEASE_ASSERT using auto_sni with :authority header > 255 bytes
https://notcve.org/view.php?id=CVE-2024-32475
Envoy is a cloud-native, open source edge and service proxy. When an upstream TLS cluster is used with `auto_sni` enabled, a request containing a `host`/`:authority` header longer than 255 characters triggers an abnormal termination of Envoy process. Envoy does not gracefully handle an error when setting SNI for outbound TLS connection. The error can occur when Envoy attempts to use the `host`/`:authority` header value longer than 255 characters as SNI for outbound TLS connection. SNI length is limited to 255 characters per the standard. • https://github.com/envoyproxy/envoy/commit/b47fc6648d7c2dfe0093a601d44cb704b7bad382 https://github.com/envoyproxy/envoy/security/advisories/GHSA-3mh5-6q8v-25wj • CWE-253: Incorrect Check of Function Return Value CWE-617: Reachable Assertion •
CVSS: 5.3EPSS: 0%CPEs: 4EXPL: 2CVE-2024-30255 – HTTP/2: CPU exhaustion due to CONTINUATION frame flood
https://notcve.org/view.php?id=CVE-2024-30255
Envoy is a cloud-native, open source edge and service proxy. The HTTP/2 protocol stack in Envoy versions prior to 1.29.3, 1.28.2, 1.27.4, and 1.26.8 are vulnerable to CPU exhaustion due to flood of CONTINUATION frames. Envoy's HTTP/2 codec allows the client to send an unlimited number of CONTINUATION frames even after exceeding Envoy's header map limits. This allows an attacker to send a sequence of CONTINUATION frames without the END_HEADERS bit set causing CPU utilization, consuming approximately 1 core per 300Mbit/s of traffic and culminating in denial of service through CPU exhaustion. Users should upgrade to version 1.29.3, 1.28.2, 1.27.4, or 1.26.8 to mitigate the effects of the CONTINUATION flood. • https://github.com/lockness-Ko/CVE-2024-27316 https://github.com/blackmagic2023/Envoy-CPU-Exhaustion-Vulnerability-PoC http://www.openwall.com/lists/oss-security/2024/04/03/16 http://www.openwall.com/lists/oss-security/2024/04/05/3 https://github.com/envoyproxy/envoy/security/advisories/GHSA-j654-3ccm-vfmm https://access.redhat.com/security/cve/CVE-2024-30255 https://bugzilla.redhat.com/show_bug.cgi?id=2272986 • CWE-390: Detection of Error Condition Without Action •
CVSS: 7.5EPSS: 0%CPEs: 4EXPL: 0CVE-2024-23322 – Envoy crashes when idle and request per try timeout occur within the backoff interval
https://notcve.org/view.php?id=CVE-2024-23322
Envoy is a high-performance edge/middle/service proxy. Envoy will crash when certain timeouts happen within the same interval. The crash occurs when the following are true: 1. hedge_on_per_try_timeout is enabled, 2. per_try_idle_timeout is enabled (it can only be done in configuration), 3. per-try-timeout is enabled, either through headers or configuration and its value is equal, or within the backoff interval of the per_try_idle_timeout. This issue has been addressed in released 1.29.1, 1.28.1, 1.27.3, and 1.26.7. Users are advised to upgrade. • https://github.com/envoyproxy/envoy/commit/843f9e6a123ed47ce139b421c14e7126f2ac685e https://github.com/envoyproxy/envoy/security/advisories/GHSA-6p83-mfmh-qv38 • CWE-416: Use After Free •
CVSS: 5.3EPSS: 0%CPEs: 4EXPL: 0CVE-2024-23323 – Excessive CPU usage when URI template matcher is configured using regex in Envoy
https://notcve.org/view.php?id=CVE-2024-23323
Envoy is a high-performance edge/middle/service proxy. The regex expression is compiled for every request and can result in high CPU usage and increased request latency when multiple routes are configured with such matchers. This issue has been addressed in released 1.29.1, 1.28.1, 1.27.3, and 1.26.7. Users are advised to upgrade. There are no known workarounds for this vulnerability. • https://github.com/envoyproxy/envoy/commit/71eeee8f0f0132f39e402b0ee23b361ee2f4e645 https://github.com/envoyproxy/envoy/security/advisories/GHSA-x278-4w4x-r7ch • CWE-400: Uncontrolled Resource Consumption CWE-1176: Inefficient CPU Computation •