CVE-2022-23635: high-severity vulnerability in istio
Unauthenticated control plane denial of service attack in Istio
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 1.7%
Istio is an open platform to connect, manage, and secure microservices. In affected versions the Istio control plane, `istiod`, is vulnerable to a request processing error, allowing a malicious attacker that sends a specially crafted message which results in the control plane crashing. This endpoint is served over TLS port 15012, but does not require any authentication from the attacker. For simple installations, Istiod is typically only reachable from within the cluster, limiting the blast radius. However, for some deployments, especially [multicluster](https://istio.io/latest/docs/setup/install/multicluster/primary-remote/) topologies, this port is exposed over the public internet. There are no effective workarounds, beyond upgrading. Limiting network access to Istiod to the minimal set of clients can help lessen the scope of the vulnerability to some extent.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
istio · istioRelated CVEs — istio
In the same product, most dangerous first.
CVE-2022-24726HIGHUnauthenticated control plane denial of service attack in IstioEPSS 1.6%CVE-2022-39278HIGHIstio vulnerable to denial of service attack due to Golang Regex LibraryEPSS 1.4%CVE-2021-39155HIGHAuthorization Policy Bypass Due to Case Insensitive Host ComparisonEPSS 1.2%CVE-2022-31045HIGHIll-formed headers may lead to unexpected behavior in IstioEPSS 1.2%CVE-2021-39156HIGHFragments in Path May Lead to Authorization Policy BypassEPSS 1.2%CVE-2022-21679MEDIUMAuthorization Policy bypass in IstioEPSS 1.1%