H2o
by H2o Project
Source repositories
CVEs (18)
| CVE | Vendor / Product | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|---|
| CVE-2023-44487 | Hig | 0.65 | 7.5 | 1.00 | KEV | Oct 10, 2023 | The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023. | |
| CVE-2018-0608 | Cri | 0.64 | 9.8 | 0.04 | Jun 26, 2018 | Buffer overflow in H2O version 2.2.4 and earlier allows remote attackers to execute arbitrary code or cause a denial of service (DoS) via unspecified vectors. | ||
| CVE-2016-7835 | Cri | 0.59 | 9.1 | 0.02 | Jun 9, 2017 | Use-after-free vulnerability in H2O allows remote attackers to cause a denial-of-service (DoS) or obtain server certificate private keys and possibly other information. | ||
| CVE-2017-10908 | Hig | 0.49 | 7.5 | 0.04 | Dec 22, 2017 | H2O version 2.2.3 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/2 header. | ||
| CVE-2017-10869 | Hig | 0.49 | 7.5 | 0.03 | Dec 22, 2017 | Buffer overflow in H2O version 2.2.2 and earlier allows remote attackers to cause a denial-of-service in the server via unspecified vectors. | ||
| CVE-2017-10868 | Hig | 0.49 | 7.5 | 0.03 | Dec 22, 2017 | H2O version 2.2.2 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/1 header. | ||
| CVE-2016-4864 | Hig | 0.49 | 7.5 | 0.02 | May 12, 2017 | H2O versions 2.0.3 and earlier and 2.1.0-beta2 and earlier allows remote attackers to cause a denial-of-service (DoS) via format string specifiers in a template file via fastcgi, mruby, proxy, redirect or reproxy. | ||
| CVE-2016-4817 | Hig | 0.49 | 7.5 | 0.04 | Jun 19, 2016 | lib/http2/connection.c in H2O before 1.7.3 and 2.x before 2.0.0-beta5 mishandles HTTP/2 disconnection, which allows remote attackers to cause a denial of service (use-after-free and application crash) or possibly execute arbitrary code via a crafted packet. | ||
| CVE-2017-10872 | Med | 0.42 | 6.5 | 0.02 | Dec 22, 2017 | H2O version 2.2.3 and earlier allows remote attackers to cause a denial of service in the server via unspecified vectors. | ||
| CVE-2016-1133 | Low | 0.24 | 3.7 | 0.01 | Jan 16, 2016 | CRLF injection vulnerability in the on_req function in lib/handler/redirect.c in H2O before 1.6.2 and 1.7.x before 1.7.0-beta3 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via a crafted URI. | ||
| CVE-2024-45403 | 0.00 | — | 0.01 | Oct 11, 2024 | h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. When h2o is configured as a reverse proxy and HTTP/3 requests are cancelled by the client, h2o might crash due to an assertion failure. The crash can be exploited by an attacker to mount a Denial-of-Service… | |||
| CVE-2024-45397 | 0.00 | — | 0.00 | Oct 11, 2024 | h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. When an HTTP request using TLS/1.3 early data on top of TCP Fast Open or QUIC 0-RTT packets is received and the IP-address-based access control is used, the access control does not detect and prohibit HTTP… | |||
| CVE-2024-25622 | 0.00 | — | 0.00 | Oct 11, 2024 | h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. The configuration directives provided by the headers handler allows users to modify the response headers being sent by h2o. The configuration file of h2o has scopes, and the inner scopes (e.g., path level) are… | |||
| CVE-2023-50247 | 0.00 | — | 0.01 | Dec 12, 2023 | h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. The QUIC stack (quicly), as used by H2O up to commit 43f86e5 (in version 2.3.0-beta and prior), is susceptible to a state exhaustion attack. When H2O is serving HTTP/3, a remote attacker can exploit this… | |||
| CVE-2023-41337 | 0.00 | — | 0.00 | Dec 12, 2023 | h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. In version 2.3.0-beta2 and prior, when h2o is configured to listen to multiple addresses or ports with each of them using different backend servers managed by multiple entities, a malicious backend entity that… | |||
| CVE-2023-6017 | 0.00 | — | 0.01 | Nov 16, 2023 | H2O included a reference to an S3 bucket that no longer existed allowing an attacker to take over the S3 bucket URL. | |||
| CVE-2023-30847 | 0.00 | — | 0.01 | Apr 27, 2023 | H2O is an HTTP server. In versions 2.3.0-beta2 and prior, when the reverse proxy handler tries to processes a certain type of invalid HTTP request, it tries to build an upstream URL by reading from uninitialized pointer. This behavior can lead to crashes or leak of information… | |||
| CVE-2021-43848 | 0.00 | — | 0.03 | Feb 1, 2022 | h2o is an open source http server. In code prior to the `8c0eca3` commit h2o may attempt to access uninitialized memory. When receiving QUIC frames in certain order, HTTP/3 server-side implementation of h2o can be misguided to treat uninitialized memory as HTTP/3 frames that… |
- risk 0.65cvss 7.5epss 1.00
The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.
- risk 0.64cvss 9.8epss 0.04
Buffer overflow in H2O version 2.2.4 and earlier allows remote attackers to execute arbitrary code or cause a denial of service (DoS) via unspecified vectors.
- risk 0.59cvss 9.1epss 0.02
Use-after-free vulnerability in H2O allows remote attackers to cause a denial-of-service (DoS) or obtain server certificate private keys and possibly other information.
- risk 0.49cvss 7.5epss 0.04
H2O version 2.2.3 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/2 header.
- risk 0.49cvss 7.5epss 0.03
Buffer overflow in H2O version 2.2.2 and earlier allows remote attackers to cause a denial-of-service in the server via unspecified vectors.
- risk 0.49cvss 7.5epss 0.03
H2O version 2.2.2 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/1 header.
- risk 0.49cvss 7.5epss 0.02
H2O versions 2.0.3 and earlier and 2.1.0-beta2 and earlier allows remote attackers to cause a denial-of-service (DoS) via format string specifiers in a template file via fastcgi, mruby, proxy, redirect or reproxy.
- risk 0.49cvss 7.5epss 0.04
lib/http2/connection.c in H2O before 1.7.3 and 2.x before 2.0.0-beta5 mishandles HTTP/2 disconnection, which allows remote attackers to cause a denial of service (use-after-free and application crash) or possibly execute arbitrary code via a crafted packet.
- risk 0.42cvss 6.5epss 0.02
H2O version 2.2.3 and earlier allows remote attackers to cause a denial of service in the server via unspecified vectors.
- risk 0.24cvss 3.7epss 0.01
CRLF injection vulnerability in the on_req function in lib/handler/redirect.c in H2O before 1.6.2 and 1.7.x before 1.7.0-beta3 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via a crafted URI.
- CVE-2024-45403Oct 11, 2024risk 0.00cvss —epss 0.01
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. When h2o is configured as a reverse proxy and HTTP/3 requests are cancelled by the client, h2o might crash due to an assertion failure. The crash can be exploited by an attacker to mount a Denial-of-Service…
- CVE-2024-45397Oct 11, 2024risk 0.00cvss —epss 0.00
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. When an HTTP request using TLS/1.3 early data on top of TCP Fast Open or QUIC 0-RTT packets is received and the IP-address-based access control is used, the access control does not detect and prohibit HTTP…
- CVE-2024-25622Oct 11, 2024risk 0.00cvss —epss 0.00
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. The configuration directives provided by the headers handler allows users to modify the response headers being sent by h2o. The configuration file of h2o has scopes, and the inner scopes (e.g., path level) are…
- CVE-2023-50247Dec 12, 2023risk 0.00cvss —epss 0.01
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. The QUIC stack (quicly), as used by H2O up to commit 43f86e5 (in version 2.3.0-beta and prior), is susceptible to a state exhaustion attack. When H2O is serving HTTP/3, a remote attacker can exploit this…
- CVE-2023-41337Dec 12, 2023risk 0.00cvss —epss 0.00
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. In version 2.3.0-beta2 and prior, when h2o is configured to listen to multiple addresses or ports with each of them using different backend servers managed by multiple entities, a malicious backend entity that…
- CVE-2023-6017Nov 16, 2023risk 0.00cvss —epss 0.01
H2O included a reference to an S3 bucket that no longer existed allowing an attacker to take over the S3 bucket URL.
- CVE-2023-30847Apr 27, 2023risk 0.00cvss —epss 0.01
H2O is an HTTP server. In versions 2.3.0-beta2 and prior, when the reverse proxy handler tries to processes a certain type of invalid HTTP request, it tries to build an upstream URL by reading from uninitialized pointer. This behavior can lead to crashes or leak of information…
- CVE-2021-43848Feb 1, 2022risk 0.00cvss —epss 0.03
h2o is an open source http server. In code prior to the `8c0eca3` commit h2o may attempt to access uninitialized memory. When receiving QUIC frames in certain order, HTTP/3 server-side implementation of h2o can be misguided to treat uninitialized memory as HTTP/3 frames that…