GHSA-j86v-2vjr-fg8f: Go.etcd.io/etcd/v3 Etcd Gateway TLS Endpoint Validation Vulnerability

MODERATE
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Advisory Summary

GHSA-j86v-2vjr-fg8f is a MODERATE etcd gateway tls endpoint validation vulnerability (General Security Weakness) affecting Go.etcd.io/etcd/v3 libraries in the Go ecosystem. The issue involves etcd gateway tls endpoint validation only confirms tcp reachability. Remediation is available by upgrading affected packages to version 3.4.10, 3.3.23.

GHSA-j86v-2vjr-fg8f at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-j86v-2vjr-fg8f
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification General Security Weakness
Affected Product Go.etcd.io/etcd/v3
Package Ecosystem Go
Published Date
Last Updated

How to Fix GHSA-j86v-2vjr-fg8f

To remediate this vulnerability, upgrade all affected Go.etcd.io/etcd/v3 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

go.etcd.io/etcd/v3 fixed: 3.4.10 
Upgrade go.etcd.io/etcd/v3 to 3.4.10
go.etcd.io/etcd/v3 fixed: 3.3.23 
Upgrade go.etcd.io/etcd/v3 to 3.3.23
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for go.etcd.io/etcd/v3

How to Check if You Are Affected

To determine whether your application is affected by GHSA-j86v-2vjr-fg8f, inspect your project dependencies for Go.etcd.io/etcd/v3:

inspect dependencies for go.etcd.io/etcd/v3

Analyze the terminal output to locate any version of Go.etcd.io/etcd/v3 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.4.10), 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 General Security Weakness. In Go.etcd.io/etcd/v3, 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

### Vulnerability type Cryptography ### Workarounds Refer to the [gateway documentation](https://github.com/etcd-io/etcd/blob/master/Documentation/op-guide/gateway.md). The vulnerability was spotted due to unclear documentation of how the gateway handles endpoints validation. ### Detail Secure endpoint validation is performed by the etcd gateway start command when the --discovery-srv flag is enabled. However, as currently implemented, it only validates TCP reachability, effectively allowing connections to an endpoint that doesn't accept TLS connections through the HTTPS URL. The auditors has noted that appropriate documentation of this validation functionality plus deprecation of this misleading functionality is an acceptable path forward. ### References Find out more on this vulnerability in the [security audit report](https://github.com/etcd-io/etcd/blob/master/security/SECURITY_AUDIT.pdf) ### For more information If you have any questions or comments about this advisory: * Contact the [etcd security committee](https://github.com/etcd-io/etcd/blob/master/security/security-release-process.md#product-security-committee-psc)

GHSA-j86v-2vjr-fg8f Affected Go.etcd.io/etcd/v3 Versions

2 component(s)
Fixed Versions:
3.4.103.3.23
Product / Package Ecosystem Affected Versions Fixed Version
go.etcd.io/etcd/v3
golang/go.etcd.io/etcd/v3
Go
≥ 3.4.0-rc.0
< 3.4.10
3.4.10
go.etcd.io/etcd/v3
golang/go.etcd.io/etcd/v3
Go
< 3.3.23
3.3.23

References

GitHub Advisory / Wiki ADVISORY
https://github.com/etcd-io/etcd/security/advisories/GHSA-j86v-2vjr-fg8f

Frequently Asked Questions

What is GHSA-j86v-2vjr-fg8f?
GHSA-j86v-2vjr-fg8f is a security vulnerability in Go.etcd.io/etcd/v3 involving Etcd Gateway TLS endpoint validation only confirms TCP reachability under General Security Weakness.
Which Go.etcd.io/etcd/v3 versions are affected?
Affected versions include releases prior to 3.4.10, 3.3.23 across affected packages: go.etcd.io/etcd/v3.
What version fixes GHSA-j86v-2vjr-fg8f?
Upgrading to 3.4.10, 3.3.23 (or the latest patched release for your respective branch) resolves the vulnerability.
Is go.etcd.io/etcd/v3 affected?
Yes, go.etcd.io/etcd/v3 is affected in releases prior to 3.4.10, 3.3.23. Upgrade your dependency to 3.4.10, 3.3.23 or later.
What CWE is associated with GHSA-j86v-2vjr-fg8f?
GHSA-j86v-2vjr-fg8f is classified under General Security Weakness.
How can I check Go dependencies for GHSA-j86v-2vjr-fg8f?
Run the dependency tree command: 'inspect dependencies for go.etcd.io/etcd/v3'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-j86v-2vjr-fg8f",
  "modified" : "2024-07-08T20:02:03Z",
  "published" : "2024-02-03T00:03:04Z",
  "aliases" : [ ],
  "summary" : "Etcd Gateway TLS endpoint validation only confirms TCP reachability",
  "details" : "### Vulnerability type\nCryptography\n\n### Workarounds\nRefer to the [gateway documentation](https://github.com/etcd-io/etcd/blob/master/Documentation/op-guide/gateway.md). The vulnerability was spotted due to unclear documentation of how the gateway handles endpoints validation. \n\n### Detail\nSecure endpoint validation is performed by the etcd gateway start command when the --discovery-srv flag is enabled. However, as currently implemented, it only validates TCP reachability, effectively allowing connections to an endpoint that doesn't accept TLS connections through the HTTPS URL. The auditors has noted that appropriate documentation of this validation functionality plus deprecation of this misleading functionality is an acceptable path forward.\n\n### References\nFind out more on this vulnerability in the [security audit report](https://github.com/etcd-io/etcd/blob/master/security/SECURITY_AUDIT.pdf)\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Contact the [etcd security committee](https://github.com/etcd-io/etcd/blob/master/security/security-release-process.md#product-security-committee-psc)",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "go.etcd.io/etcd/v3"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.4.0-rc.0"
      }, {
        "fixed" : "3.4.10"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 3.4.9"
    }
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "go.etcd.io/etcd/v3"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.3.23"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/etcd-io/etcd/security/advisories/GHSA-j86v-2vjr-fg8f"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-02-03T00:03:04Z",
    "nvd_published_at" : null
  }
}