CVE-2020-15114: Go.etcd.io/etcd Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-2xhq-gv6c-p224
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CVSS 7.7
CWE-400 CWE-772
Published
Advisory Summary

CVE-2020-15114 is a HIGH (CVSS 7.7) remote code execution vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Go.etcd.io/etcd libraries in the Go ecosystem. The issue involves etcd gateway can include itself as an endpoint resulting in resource exhaustion. Remediation is available by upgrading affected packages to version 3.4.10, 3.3.23.

CVE-2020-15114 at a Glance

CVE Identifier CVE-2020-15114
GHSA Identifier GHSA-2xhq-gv6c-p224
Severity HIGH
CVSS v3.1 Base Score 7.7
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Go.etcd.io/etcd
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 7.7

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2020-15114

To remediate this vulnerability, upgrade all affected Go.etcd.io/etcd 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 fixed: 3.4.10 
Upgrade go.etcd.io/etcd to 3.4.10
go.etcd.io/etcd fixed: 3.3.23 
Upgrade go.etcd.io/etcd 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

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-15114, inspect your project dependencies for Go.etcd.io/etcd:

inspect dependencies for go.etcd.io/etcd

Analyze the terminal output to locate any version of Go.etcd.io/etcd 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 CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Go.etcd.io/etcd, 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 Denial of Service ### Detail The etcd gateway is a simple TCP proxy to allow for basic service discovery and access. However, it is possible to include the gateway address as an endpoint. This results in a denial of service, since the endpoint can become stuck in a loop of requesting itself until there are no more available file descriptors to accept connections on the gateway. ### 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)

CVE-2020-15114 Affected Go.etcd.io/etcd Versions

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

References

GitHub Advisory / Wiki ADVISORY
https://github.com/etcd-io/etcd/security/advisories/GHSA-2xhq-gv6c-p224
NVD — CVE-2020-15114 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15114
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L6B6R43Y7M3DCHWK3L3UVGE2K6WWECMP

Frequently Asked Questions

What is CVE-2020-15114?
CVE-2020-15114 is a security vulnerability in Go.etcd.io/etcd involving Etcd Gateway can include itself as an endpoint resulting in resource exhaustion under CWE-400: Uncontrolled Resource Consumption.
Which Go.etcd.io/etcd versions are affected?
Affected versions include releases prior to 3.4.10, 3.3.23 across affected packages: go.etcd.io/etcd.
What version fixes CVE-2020-15114?
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 affected?
Yes, go.etcd.io/etcd 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 is the CVSS score of CVE-2020-15114?
CVE-2020-15114 has a CVSS v3.1 base score of 7.7 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.
What CWE is associated with CVE-2020-15114?
CVE-2020-15114 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check Go dependencies for CVE-2020-15114?
Run the dependency tree command: 'inspect dependencies for go.etcd.io/etcd'. 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-2xhq-gv6c-p224",
  "modified" : "2024-01-31T00:21:52Z",
  "published" : "2024-01-31T00:21:52Z",
  "aliases" : [ "CVE-2020-15114" ],
  "summary" : "Etcd Gateway can include itself as an endpoint resulting in resource exhaustion",
  "details" : "### Vulnerability type\nDenial of Service\n\n### Detail\nThe etcd gateway is a simple TCP proxy to allow for basic service discovery and access. However, it is possible to include the gateway address as an endpoint. This results in a denial of service, since the endpoint can become stuck in a loop of requesting itself until there are no more available file descriptors to accept connections on the gateway.\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" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "go.etcd.io/etcd"
    },
    "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"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.3.23"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/etcd-io/etcd/security/advisories/GHSA-2xhq-gv6c-p224"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-15114"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L6B6R43Y7M3DCHWK3L3UVGE2K6WWECMP"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-772" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-01-31T00:21:52Z",
    "nvd_published_at" : "2020-08-06T23:15:00Z"
  }
}