CVE-2018-1099: Go.etcd.io/etcd DNS Rebinding Vulnerability

MODERATE
Advisory Identifier: GHSA-wf43-55jj-vwq8
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CVSS 5.5
CWE-20 CWE-350
Published
Advisory Summary

CVE-2018-1099 is a MODERATE (CVSS 5.5) dns rebinding vulnerability (CWE-20: Improper Input Validation) affecting Go.etcd.io/etcd libraries in the Go ecosystem. The issue involves dns rebinding in etcd. Remediation is available by upgrading affected packages to version 3.4.0.

CVE-2018-1099 at a Glance

CVE Identifier CVE-2018-1099
GHSA Identifier GHSA-wf43-55jj-vwq8
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification CWE-20: Improper Input Validation
Affected Product Go.etcd.io/etcd
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 5.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N).

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

How to Fix CVE-2018-1099

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: 3.4.0 
Upgrade go.etcd.io/etcd to 3.4.0
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-2018-1099, 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 3.4.0), 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-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. 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

DNS rebinding vulnerability found in etcd 3.3.1 and earlier. An attacker can control his DNS records to direct to localhost, and trick the browser into sending requests to localhost (or any other address).

CVE-2018-1099 Affected Go.etcd.io/etcd Versions

1 component(s)
Fixed Versions:
3.4.0
Product / Package Ecosystem Affected Versions Fixed Version
go.etcd.io/etcd
golang/go.etcd.io/etcd
Go
< 3.4.0
3.4.0

References

NVD — CVE-2018-1099 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-1099
Go.etcd.io/etcd Source Repository REPOSITORY
https://github.com/coreos/etcd/issues/9353
Security Fix Commit FIX COMMIT
https://github.com/coreos/etcd/commit/a7e5790c82039945639798ae9a3289fe787f5e56
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=1552717
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JX7QTIT465BQGRGNCE74RATRQLKT2QE4
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UPGYHMSKDPW5GAMI7BEP3XQRVRLLBJKS

Frequently Asked Questions

What is CVE-2018-1099?
CVE-2018-1099 is a security vulnerability in Go.etcd.io/etcd involving DNS Rebinding in etcd under CWE-20: Improper Input Validation.
Which Go.etcd.io/etcd versions are affected?
Affected versions include releases prior to 3.4.0 across affected packages: go.etcd.io/etcd.
What version fixes CVE-2018-1099?
Upgrading to 3.4.0 (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 3.4.0. Upgrade your dependency to 3.4.0 or later.
What is the CVSS score of CVE-2018-1099?
CVE-2018-1099 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
What CWE is associated with CVE-2018-1099?
CVE-2018-1099 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check Go dependencies for CVE-2018-1099?
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-wf43-55jj-vwq8",
  "modified" : "2021-05-19T22:09:57Z",
  "published" : "2022-02-15T01:57:18Z",
  "aliases" : [ "CVE-2018-1099" ],
  "summary" : "DNS Rebinding in etcd",
  "details" : "DNS rebinding vulnerability found in etcd 3.3.1 and earlier. An attacker can control his DNS records to direct to localhost, and trick the browser into sending requests to localhost (or any other address).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "go.etcd.io/etcd"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.4.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-1099"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/coreos/etcd/issues/9353"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/coreos/etcd/commit/a7e5790c82039945639798ae9a3289fe787f5e56"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1552717"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JX7QTIT465BQGRGNCE74RATRQLKT2QE4"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UPGYHMSKDPW5GAMI7BEP3XQRVRLLBJKS"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20", "CWE-350" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-05-19T22:09:57Z",
    "nvd_published_at" : null
  }
}