CVE-2018-17143: Golang.org/x/net Golang.org/x/net/html Has Improper Restriction Of Vulnerability

HIGH
Advisory Identifier: GHSA-fcf9-6fv2-fc5v
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CVSS 7.5
CWE-119
Published
Advisory Summary

CVE-2018-17143 is a HIGH (CVSS 7.5) golang.org/x/net/html has improper restriction of vulnerability (CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer) affecting Golang.org/x/net libraries in the Go ecosystem. The issue involves golang.org/x/net/html has improper restriction of operations within the bounds of a memory buffer. Remediation is available by upgrading affected packages to version 0.0.0-20180921000356-2f5d2388922f.

CVE-2018-17143 at a Glance

CVE Identifier CVE-2018-17143
GHSA Identifier GHSA-fcf9-6fv2-fc5v
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
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-2018-17143

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: 0.0.0-20180921000356-2f5d2388922f 
Upgrade golang.org/x/net to 0.0.0-20180921000356-2f5d2388922f
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-2018-17143, 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 0.0.0-20180921000356-2f5d2388922f), 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-119: Improper Restriction of Operations within the Bounds of a Memory Buffer, where the product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. this may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. 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 <template><tBody><isindex/action=0>, leading to a "panic: runtime error" in inBodyIM in parse.go during an html.Parse call

CVE-2018-17143 Affected Golang.org/x/net Versions

1 component(s)
Fixed Versions:
0.0.0-20180921000356-2f5d2388922f
Product / Package Ecosystem Affected Versions Fixed Version
golang.org/x/net
golang/golang.org/x/net
Go
< 0.0.0-20180921000356-2f5d2388922f
0.0.0-20180921000356-2f5d2388922f

References

NVD — CVE-2018-17143 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-17143
Golang.org/x/net Source Repository REPOSITORY
https://github.com/golang/go/issues/27704
Golang.org/x/net Source Repository REPOSITORY
https://github.com/golang/go
go-review.googlesource.com/c/net/+/136575 WEB
https://go-review.googlesource.com/c/net/+/136575
go.dev/issue/27704 WEB
https://go.dev/issue/27704
go.googlesource.com/net/+/2f5d2388922f3... WEB
https://go.googlesource.com/net/+/2f5d2388922f370f4355f327fcf4cfe9f5583908
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-2022-0193 WEB
https://pkg.go.dev/vuln/GO-2022-0193

Frequently Asked Questions

What is CVE-2018-17143?
CVE-2018-17143 is a security vulnerability in Golang.org/x/net involving golang.org/x/net/html has Improper Restriction of Operations within the Bounds of a Memory Buffer under CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer.
Which Golang.org/x/net versions are affected?
Affected versions include releases prior to 0.0.0-20180921000356-2f5d2388922f across affected packages: golang.org/x/net.
What version fixes CVE-2018-17143?
Upgrading to 0.0.0-20180921000356-2f5d2388922f (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 0.0.0-20180921000356-2f5d2388922f. Upgrade your dependency to 0.0.0-20180921000356-2f5d2388922f or later.
What is the CVSS score of CVE-2018-17143?
CVE-2018-17143 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-2018-17143?
CVE-2018-17143 is classified under CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer (The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.).
How can I check Go dependencies for CVE-2018-17143?
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-fcf9-6fv2-fc5v",
  "modified" : "2024-05-20T21:13:50Z",
  "published" : "2022-05-13T01:19:23Z",
  "aliases" : [ "CVE-2018-17143" ],
  "summary" : "golang.org/x/net/html has Improper Restriction of Operations within the Bounds of a Memory Buffer",
  "details" : "The html package (aka x/net/html) through 2018-09-17 in Go mishandles <template><tBody><isindex/action=0>, leading to a \"panic: runtime error\" in inBodyIM 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" : "0.0.0-20180921000356-2f5d2388922f"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-17143"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/golang/go/issues/27704"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/golang/go"
  }, {
    "type" : "WEB",
    "url" : "https://go-review.googlesource.com/c/net/+/136575"
  }, {
    "type" : "WEB",
    "url" : "https://go.dev/issue/27704"
  }, {
    "type" : "WEB",
    "url" : "https://go.googlesource.com/net/+/2f5d2388922f370f4355f327fcf4cfe9f5583908"
  }, {
    "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-2022-0193"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-119" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-02-08T00:36:45Z",
    "nvd_published_at" : "2018-09-17T14:29:00Z"
  }
}