CVE-2022-23635: Istio.io/istio Denial of Service Vulnerability
HIGHCVE-2022-23635 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-287: Improper Authentication) affecting Istio.io/istio libraries in the Go ecosystem. The issue involves unauthenticated control plane denial of service attack in istio. Remediation is available by upgrading affected packages to version 1.13.1, 1.12.4, 1.11.7.
CVE-2022-23635 at a Glance
Security Impact
CVSS: 7.5
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
How to Fix CVE-2022-23635
To remediate this vulnerability, upgrade all affected Istio.io/istio dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade istio.io/istio to 1.13.1Upgrade istio.io/istio to 1.12.4Upgrade istio.io/istio to 1.11.7Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for istio.io/istioHow to Check if You Are Affected
To determine whether your application is affected by CVE-2022-23635, inspect your project dependencies for Istio.io/istio:
inspect dependencies for istio.io/istioAnalyze the terminal output to locate any version of Istio.io/istio in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.13.1), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-287: Improper Authentication, where when an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. In Istio.io/istio, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2022-23635 Affected Istio.io/istio Versions
3 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
istio.io/istio
|
Go |
≥ 1.13.0
< 1.13.1
All 1 versions
1.13.0
|
1.13.1
|
|
istio.io/istio
|
Go |
≥ 1.12.0
< 1.12.4
|
1.12.4
|
|
istio.io/istio
|
Go |
< 1.11.7
|
1.11.7
|
References
Frequently Asked Questions
What is CVE-2022-23635?
Which Istio.io/istio versions are affected?
What version fixes CVE-2022-23635?
Is istio.io/istio affected?
What is the CVSS score of CVE-2022-23635?
What CWE is associated with CVE-2022-23635?
How can I check Go dependencies for CVE-2022-23635?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-856q-xv3c-7f2f",
"modified" : "2022-02-25T15:38:52Z",
"published" : "2022-02-23T14:59:08Z",
"aliases" : [ "CVE-2022-23635" ],
"summary" : "Unauthenticated control plane denial of service attack in Istio",
"details" : "### Impact\nThe 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.\n\nFor 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.\n\n### Patches\n\n- Istio 1.13.1 and above\n- Istio 1.12.4 and above\n- Istio 1.11.7 and above\n\n### Workarounds\nThere 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.\n\n### References\nMore details can be found in the [Istio Security Bulletin](https://istio.io/latest/news/security/istio-security-2022-003)\n\n### For more information\nIf you have any questions or comments about this advisory, please email us at [istio-security-vulnerability-reports@googlegroups.com](mailto:istio-security-vulnerability-reports@googlegroups.com)\n",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "istio.io/istio"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "1.13.0"
}, {
"fixed" : "1.13.1"
} ]
} ],
"versions" : [ "1.13.0" ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "istio.io/istio"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "1.12.0"
}, {
"fixed" : "1.12.4"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "istio.io/istio"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "1.11.7"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/istio/istio/security/advisories/GHSA-856q-xv3c-7f2f"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-23635"
}, {
"type" : "WEB",
"url" : "https://github.com/istio/istio/commit/5f3b5ed958ae75156f8656fe7b3794f78e94db84"
}, {
"type" : "WEB",
"url" : "https://github.com/istio/istio"
}, {
"type" : "WEB",
"url" : "https://istio.io/latest/news/security/istio-security-2022-003"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-1284", "CWE-287" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2022-02-23T14:59:08Z",
"nvd_published_at" : "2022-02-22T22:15:00Z"
}
}