CVE-2018-17142: Golang.org/x/net Golang.org/x/net/html NULL Pointer Dereference Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-2wp2-chmh-r934
Share
CVSS 7.5
CWE-476
Published
Advisory Summary

CVE-2018-17142 is a HIGH (CVSS 7.5) golang.org/x/net/html null pointer dereference vulnerability vulnerability (CWE-476: NULL Pointer Dereference) affecting Golang.org/x/net libraries in the Go ecosystem. The issue involves golang.org/x/net/html null pointer dereference vulnerability. Remediation is available by upgrading affected packages to version 0.0.0-20180925071336-cf3bd585ca2a.

CVE-2018-17142 at a Glance

CVE Identifier CVE-2018-17142
GHSA Identifier GHSA-2wp2-chmh-r934
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-476: NULL Pointer Dereference
Affected Product Golang.org/x/net
Package Ecosystem Go
Published Date
Last Updated

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).

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

How to Fix CVE-2018-17142

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

golang.org/x/net fixed: 0.0.0-20180925071336-cf3bd585ca2a 
Upgrade golang.org/x/net to 0.0.0-20180925071336-cf3bd585ca2a
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 golang.org/x/net

How to Check if You Are Affected

To determine whether your application is affected by CVE-2018-17142, inspect your project dependencies for Golang.org/x/net:

inspect dependencies for golang.org/x/net

Analyze the terminal output to locate any version of Golang.org/x/net in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.0.0-20180925071336-cf3bd585ca2a), 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-476: NULL Pointer Dereference, where the product dereferences a pointer that it expects to be valid but is null. In Golang.org/x/net, 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

The html package (aka x/net/html) through 2018-09-17 in Go mishandles <math><template><mo><template>, leading to a "panic: runtime error" in parseCurrentToken in parse.go during an html.Parse call

CVE-2018-17142 Affected Golang.org/x/net Versions

1 component(s)
Fixed Versions:
0.0.0-20180925071336-cf3bd585ca2a
Product / Package Ecosystem Affected Versions Fixed Version
golang.org/x/net
golang/golang.org/x/net
Go
< 0.0.0-20180925071336-cf3bd585ca2a
0.0.0-20180925071336-cf3bd585ca2a

References

NVD — CVE-2018-17142 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-17142
Golang.org/x/net Source Repository REPOSITORY
https://github.com/golang/go/issues/27702
Golang.org/x/net Source Repository REPOSITORY
https://github.com/golang/go
go.dev/cl/136875 WEB
https://go.dev/cl/136875
go.dev/issue/27702 WEB
https://go.dev/issue/27702
go.googlesource.com/net/+/cf3bd585ca2a5... WEB
https://go.googlesource.com/net/+/cf3bd585ca2a5a21b057abd8be7eea2204af89d0
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LREEWY6KNLHRWFZ7OT4HVLMVVCGGUHON
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UKRCI7WIOCOCD3H7NXWRGIRABTQOZOBK
pkg.go.dev/vuln/go-2022-0192 WEB
https://pkg.go.dev/vuln/GO-2022-0192

Frequently Asked Questions

What is CVE-2018-17142?
CVE-2018-17142 is a security vulnerability in Golang.org/x/net involving golang.org/x/net/html NULL Pointer Dereference vulnerability under CWE-476: NULL Pointer Dereference.
Which Golang.org/x/net versions are affected?
Affected versions include releases prior to 0.0.0-20180925071336-cf3bd585ca2a across affected packages: golang.org/x/net.
What version fixes CVE-2018-17142?
Upgrading to 0.0.0-20180925071336-cf3bd585ca2a (or the latest patched release for your respective branch) resolves the vulnerability.
Is golang.org/x/net affected?
Yes, golang.org/x/net is affected in releases prior to 0.0.0-20180925071336-cf3bd585ca2a. Upgrade your dependency to 0.0.0-20180925071336-cf3bd585ca2a or later.
What is the CVSS score of CVE-2018-17142?
CVE-2018-17142 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2018-17142?
CVE-2018-17142 is classified under CWE-476: NULL Pointer Dereference (The product dereferences a pointer that it expects to be valid but is NULL.).
How can I check Go dependencies for CVE-2018-17142?
Run the dependency tree command: 'inspect dependencies for golang.org/x/net'. 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-2wp2-chmh-r934",
  "modified" : "2024-05-20T20:48:29Z",
  "published" : "2022-05-13T01:19:23Z",
  "aliases" : [ "CVE-2018-17142" ],
  "summary" : "golang.org/x/net/html NULL Pointer Dereference vulnerability",
  "details" : "The html package (aka x/net/html) through 2018-09-17 in Go mishandles <math><template><mo><template>, leading to a \"panic: runtime error\" in parseCurrentToken in parse.go during an html.Parse call",
  "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" : "golang.org/x/net"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.0.0-20180925071336-cf3bd585ca2a"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-17142"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/golang/go/issues/27702"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/golang/go"
  }, {
    "type" : "WEB",
    "url" : "https://go.dev/cl/136875"
  }, {
    "type" : "WEB",
    "url" : "https://go.dev/issue/27702"
  }, {
    "type" : "WEB",
    "url" : "https://go.googlesource.com/net/+/cf3bd585ca2a5a21b057abd8be7eea2204af89d0"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LREEWY6KNLHRWFZ7OT4HVLMVVCGGUHON"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UKRCI7WIOCOCD3H7NXWRGIRABTQOZOBK"
  }, {
    "type" : "WEB",
    "url" : "https://pkg.go.dev/vuln/GO-2022-0192"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-476" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-02-08T00:36:12Z",
    "nvd_published_at" : "2018-09-17T14:29:00Z"
  }
}