Описание
When adding a key to a remote agent constraint extensions such as restrict-destination-v00@openssh.com were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them.
A flaw was found in golang.org/x/crypto/ssh/agent. When a key was added to a remote agent, security restrictions, known as constraint extensions, were not properly processed during the request. This allowed these restrictions to be silently removed when keys were forwarded, leading to the unrestricted use of the key on the remote host. This vulnerability could enable an attacker to bypass intended security controls and perform unauthorized actions.
Отчет
This Important vulnerability in golang.org/x/crypto/ssh/agent allows for a security bypass when SSH keys with destination restrictions are forwarded via an SSH agent. This flaw could lead to unintended exposure of SSH keys, enabling an attacker to use the forwarded key without the specified restrictions on remote hosts. Red Hat products utilizing golang.org/x/crypto/ssh/agent for key forwarding may be affected if users rely on constraint extensions for limiting key usage.
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 |
|---|---|---|---|---|
| Assisted Installer for Red Hat OpenShift Container Platform 2 | assisted/agent-preinstall-image-builder-rhel9 | Affected | ||
| cert-manager Operator for Red Hat OpenShift | cert-manager/cert-manager-operator-rhel9 | Affected | ||
| cert-manager Operator for Red Hat OpenShift | cert-manager/jetstack-cert-manager-rhel9 | Affected | ||
| ExternalDNS Operator | edo/external-dns-rhel9 | Not affected | ||
| External Secrets Operator for Red Hat OpenShift | external-secrets-operator/external-secrets-rhel9 | Will not fix | ||
| OpenShift Pipelines | openshift-pipelines-client | Affected | ||
| OpenShift Pipelines | openshift-pipelines/pipelines-chains-controller-rhel9 | Affected | ||
| OpenShift Pipelines | openshift-pipelines/pipelines-pipelines-as-code-controller-rhel9 | Affected | ||
| OpenShift Pipelines | openshift-pipelines/pipelines-pipelines-as-code-watcher-rhel9 | Affected | ||
| OpenShift Pipelines | openshift-pipelines/pipelines-results-api-rhel9 | Affected |
Показывать по
Дополнительная информация
Статус:
EPSS
8.7 High
CVSS3
Связанные уязвимости
When adding a key to a remote agent constraint extensions such as restrict-destination-v00@openssh.com were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them.
When adding a key to a remote agent constraint extensions such as restrict-destination-v00@openssh.com were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them.
Invoking agent constraints dropped when forwarding keys in golang.org/x/crypto/ssh/agent
When adding a key to a remote agent constraint extensions such as rest ...
EPSS
8.7 High
CVSS3