GHSA-p2g9-94wh-65c2: Ammonia Space Bug Vulnerability

MODERATE
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CWE-79
Published
Advisory Summary

GHSA-p2g9-94wh-65c2 is a MODERATE space bug vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Ammonia libraries in the crates.io ecosystem. The issue involves space bug in `clean_text`. Remediation is available by upgrading affected packages to version 3.1.3.

GHSA-p2g9-94wh-65c2 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-p2g9-94wh-65c2
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Ammonia
Package Ecosystem crates.io
Published Date
Last Updated

How to Fix GHSA-p2g9-94wh-65c2

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

ammonia fixed: 3.1.3 
Upgrade ammonia to 3.1.3
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 ammonia

How to Check if You Are Affected

To determine whether your application is affected by GHSA-p2g9-94wh-65c2, inspect your project dependencies for Ammonia:

inspect dependencies for ammonia

Analyze the terminal output to locate any version of Ammonia in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.1.3), 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-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Ammonia, 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

An incorrect mapping from HTML specification to ASCII codes was used. Because HTML treats the Form Feed as whitespace, code like this has an injection bug: let html = format!("<div title={}>", clean_text(user_supplied_string)); Applications are not affected if they quote their attributes, or if they don't use `clean_text` at all.

GHSA-p2g9-94wh-65c2 Affected Ammonia Versions

1 component(s)
Fixed Versions:
3.1.3
Product / Package Ecosystem Affected Versions Fixed Version
ammonia
 crates.io
≥ 3.0.0
< 3.1.3
3.1.3

References

Ammonia Source Repository REPOSITORY
https://github.com/rust-ammonia/ammonia/pull/147
Security Fix Commit FIX COMMIT
https://github.com/rust-ammonia/ammonia/commit/6c7bf22907a75d1bbaed52e4f7dd9716f5e6f737
Ammonia Source Repository REPOSITORY
https://github.com/rust-ammonia/ammonia
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2022-0003.html

Frequently Asked Questions

What is GHSA-p2g9-94wh-65c2?
GHSA-p2g9-94wh-65c2 is a security vulnerability in Ammonia involving Space bug in `clean_text` under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Ammonia versions are affected?
Affected versions include releases prior to 3.1.3 across affected packages: ammonia.
What version fixes GHSA-p2g9-94wh-65c2?
Upgrading to 3.1.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ammonia affected?
Yes, ammonia is affected in releases prior to 3.1.3. Upgrade your dependency to 3.1.3 or later.
What CWE is associated with GHSA-p2g9-94wh-65c2?
GHSA-p2g9-94wh-65c2 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check crates.io dependencies for GHSA-p2g9-94wh-65c2?
Run the dependency tree command: 'inspect dependencies for ammonia'. 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-p2g9-94wh-65c2",
  "modified" : "2022-06-16T23:39:55Z",
  "published" : "2022-06-16T23:39:55Z",
  "aliases" : [ ],
  "summary" : "Space bug in `clean_text`",
  "details" : "An incorrect mapping from HTML specification to ASCII codes was used.\nBecause HTML treats the Form Feed as whitespace, code like this has an injection bug:\n\n    let html = format!(\"<div title={}>\", clean_text(user_supplied_string));\n\nApplications are not affected if they quote their attributes, or if they don't use `clean_text` at all.\n",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "ammonia"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0.0"
      }, {
        "fixed" : "3.1.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/rust-ammonia/ammonia/pull/147"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rust-ammonia/ammonia/commit/6c7bf22907a75d1bbaed52e4f7dd9716f5e6f737"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/rust-ammonia/ammonia"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2022-0003.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-06-16T23:39:55Z",
    "nvd_published_at" : null
  }
}