Описание
The net/http HTTP/1.1 client mishandled the case where a server responds to a request with an "Expect: 100-continue" header with a non-informational (200 or higher) status. This mishandling could leave a client connection in an invalid state, where the next request sent on the connection will fail. An attacker sending a request to a net/http/httputil.ReverseProxy proxy can exploit this mishandling to cause a denial of service by sending "Expect: 100-continue" requests which elicit a non-informational response from the backend. Each such request leaves the proxy with an invalid connection, and causes one subsequent request using that connection to fail.
A flaw was found in Go. The net/http module mishandles specific server responses from HTTP/1.1 client requests. This issue may render a connection invalid and cause a denial of service.
Отчет
An attacker would need to control a malicious server and induce a client to connect to it, requiring some amount of preparation outside of the attacker's control. This reduces the severity score of this flaw to Moderate. Within regulated environments, a combination of the following controls acts as a significant barrier to successfully exploiting a CWE-20: Improper Input Validation vulnerability and therefore downgrades the severity of this particular CVE from Moderate to Low. Red Hat enforces the principle of least functionality, ensuring that only essential features, services, and ports are enabled. This minimizes the number of components that could be affected by input validation vulnerabilities. Security testing and evaluation standards are implemented within the environment to rigorously test input validation mechanisms during the development lifecycle, while static code analysis identifies potential input validation vulnerabilities by default. Process isolation ensures that processes handling potentially malicious or unvalidated inputs run in isolated environments by separating execution domains for each process. Malicious code protections, such as IPS/IDS and antimalware solutions, help detect and mitigate malicious payloads stemming from input validation vulnerabilities. Finally, robust input validation and error-handling mechanisms ensure all user inputs are thoroughly validated, preventing improperly validated inputs from causing system instability, exposing sensitive data, or escalating risks further.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Builds for Red Hat OpenShift | openshift-builds/openshift-builds-waiters-rhel8 | Will not fix | ||
| Fence Agents Remediation Operator | workload-availability/fence-agents-remediation-rhel8-operator | Will not fix | ||
| Logical Volume Manager Storage | lvms4/topolvm-rhel9 | Will not fix | ||
| Machine Deletion Remediation Operator | workload-availability/machine-deletion-remediation-rhel8-operator | Will not fix | ||
| Migration Toolkit for Applications 6 | mta/mta-hub-rhel8 | Will not fix | ||
| Migration Toolkit for Applications 7 | mta/mta-cli-rhel9 | Not affected | ||
| Migration Toolkit for Virtualization | migration-toolkit-virtualization/mtv-api-rhel9 | Fix deferred | ||
| Multicluster Engine for Kubernetes | multicluster-engine/hive-rhel8 | Affected | ||
| NBDE Tang Server | tang-operator-container | Will not fix | ||
| Node HealthCheck Operator | workload-availability/node-healthcheck-rhel8-operator | Will not fix |
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Дополнительная информация
Статус:
EPSS
5.9 Medium
CVSS3
Связанные уязвимости
The net/http HTTP/1.1 client mishandled the case where a server responds to a request with an "Expect: 100-continue" header with a non-informational (200 or higher) status. This mishandling could leave a client connection in an invalid state, where the next request sent on the connection will fail. An attacker sending a request to a net/http/httputil.ReverseProxy proxy can exploit this mishandling to cause a denial of service by sending "Expect: 100-continue" requests which elicit a non-informational response from the backend. Each such request leaves the proxy with an invalid connection, and causes one subsequent request using that connection to fail.
The net/http HTTP/1.1 client mishandled the case where a server responds to a request with an "Expect: 100-continue" header with a non-informational (200 or higher) status. This mishandling could leave a client connection in an invalid state, where the next request sent on the connection will fail. An attacker sending a request to a net/http/httputil.ReverseProxy proxy can exploit this mishandling to cause a denial of service by sending "Expect: 100-continue" requests which elicit a non-informational response from the backend. Each such request leaves the proxy with an invalid connection, and causes one subsequent request using that connection to fail.
The net/http HTTP/1.1 client mishandled the case where a server respon ...
EPSS
5.9 Medium
CVSS3