Описание
Impact:
A bad regular expression is generated any time you have multiple sequential optional groups (curly brace syntax), such as {a}{b}{c}:z. The generated regex grows exponentially with the number of groups, causing denial of service.
Patches:
Fixed in version 8.4.0.
Workarounds:
Limit the number of sequential optional groups in route patterns. Avoid passing user-controlled input as route patterns.
A flaw was found in path-to-regexp. A remote attacker could exploit this vulnerability by providing specially crafted input that generates a regular expression with multiple sequential optional groups. This leads to an exponential growth in the generated regular expression, causing a Denial of Service (DoS) due to excessive resource consumption.
Отчет
This is an Important flaw in path-to-regexp that can lead to a Denial of Service. The vulnerability occurs when specially crafted input containing multiple sequential optional groups is used to generate regular expressions, causing exponential resource consumption.
The Red Hat Advanced Cluster Security is not affected by this issue since it's shipping a path-to-regexp version which doesn't contain the vulnerable code.
Меры по смягчению последствий
To mitigate this vulnerability, limit the use of multiple sequential optional groups in route patterns within applications that use path-to-regexp. Additionally, avoid directly passing user-controlled input as route patterns to prevent the generation of maliciously crafted regular expressions.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Cryostat 4 | io.cryostat-cryostat | Not affected | ||
| Logging Subsystem for Red Hat OpenShift | openshift-logging/elasticsearch6-rhel9 | Will not fix | ||
| Logging Subsystem for Red Hat OpenShift | openshift-logging/elasticsearch-operator-bundle | Will not fix | ||
| Logging Subsystem for Red Hat OpenShift | openshift-logging/elasticsearch-proxy-rhel9 | Will not fix | ||
| Logging Subsystem for Red Hat OpenShift | openshift-logging/elasticsearch-rhel9-operator | Will not fix | ||
| Logging Subsystem for Red Hat OpenShift | openshift-logging/kibana6-rhel8 | Will not fix | ||
| Logging Subsystem for Red Hat OpenShift | openshift-logging/logging-curator5-rhel9 | Will not fix | ||
| Multicluster Engine for Kubernetes | multicluster-engine/console-mce-rhel9 | Affected | ||
| Network Observability Operator | network-observability/network-observability-console-plugin-rhel9 | Not affected | ||
| OpenShift Lightspeed | openshift-lightspeed/lightspeed-console-plugin-pf5-rhel9 | Not affected |
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Дополнительная информация
Статус:
EPSS
7.5 High
CVSS3
Связанные уязвимости
Impact: A bad regular expression is generated any time you have multiple sequential optional groups (curly brace syntax), such as `{a}{b}{c}:z`. The generated regex grows exponentially with the number of groups, causing denial of service. Patches: Fixed in version 8.4.0. Workarounds: Limit the number of sequential optional groups in route patterns. Avoid passing user-controlled input as route patterns.
Impact: A bad regular expression is generated any time you have multiple sequential optional groups (curly brace syntax), such as `{a}{b}{c}:z`. The generated regex grows exponentially with the number of groups, causing denial of service. Patches: Fixed in version 8.4.0. Workarounds: Limit the number of sequential optional groups in route patterns. Avoid passing user-controlled input as route patterns.
Impact: A bad regular expression is generated any time you have multi ...
path-to-regexp vulnerable to Denial of Service via sequential optional groups
EPSS
7.5 High
CVSS3