CVE-2021-28030: Truetype Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-v7q4-97x4-4qw2
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CVSS 7.5
CWE-908
Published
Advisory Summary

CVE-2021-28030 is a HIGH (CVSS 7.5) remote code execution vulnerability (CWE-908: Use of Uninitialized Resource) affecting Truetype libraries in the crates.io ecosystem. The issue involves use of uninitialized resource in truetype. Remediation is available by upgrading affected packages to version 0.30.1.

CVE-2021-28030 at a Glance

CVE Identifier CVE-2021-28030
GHSA Identifier GHSA-v7q4-97x4-4qw2
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-908: Use of Uninitialized Resource
Affected Product Truetype
Package Ecosystem crates.io
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:H/I:N/A:N).

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 High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2021-28030

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

truetype fixed: 0.30.1 
Upgrade truetype to 0.30.1
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 truetype

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-28030, inspect your project dependencies for Truetype:

inspect dependencies for truetype

Analyze the terminal output to locate any version of Truetype in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.30.1), 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-908: Use of Uninitialized Resource, where the product uses or accesses a resource that has not been initialized. In Truetype, 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 issue was discovered in the truetype crate before 0.30.1 for Rust. Attackers can read the contents of uninitialized memory locations via a user-provided Read operation within Tape::take_bytes.

CVE-2021-28030 Affected Truetype Versions

1 component(s)
Fixed Versions:
0.30.1
Product / Package Ecosystem Affected Versions Fixed Version
truetype
 crates.io
< 0.30.1
0.30.1

References

NVD — CVE-2021-28030 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-28030
Truetype Source Repository REPOSITORY
https://github.com/bodoni/truetype/issues/11
Truetype Source Repository REPOSITORY
https://github.com/bodoni/truetype
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2021-0029.html

Frequently Asked Questions

What is CVE-2021-28030?
CVE-2021-28030 is a security vulnerability in Truetype involving Use of Uninitialized Resource in truetype under CWE-908: Use of Uninitialized Resource.
Which Truetype versions are affected?
Affected versions include releases prior to 0.30.1 across affected packages: truetype.
What version fixes CVE-2021-28030?
Upgrading to 0.30.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is truetype affected?
Yes, truetype is affected in releases prior to 0.30.1. Upgrade your dependency to 0.30.1 or later.
What is the CVSS score of CVE-2021-28030?
CVE-2021-28030 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:H/I:N/A:N.
What CWE is associated with CVE-2021-28030?
CVE-2021-28030 is classified under CWE-908: Use of Uninitialized Resource (The product uses or accesses a resource that has not been initialized.).
How can I check crates.io dependencies for CVE-2021-28030?
Run the dependency tree command: 'inspect dependencies for truetype'. 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-v7q4-97x4-4qw2",
  "modified" : "2021-08-19T17:22:46Z",
  "published" : "2021-08-25T20:51:58Z",
  "aliases" : [ "CVE-2021-28030" ],
  "summary" : " Use of Uninitialized Resource in truetype",
  "details" : "An issue was discovered in the truetype crate before 0.30.1 for Rust. Attackers can read the contents of uninitialized memory locations via a user-provided Read operation within Tape::take_bytes.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "truetype"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.30.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-28030"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/bodoni/truetype/issues/11"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/bodoni/truetype"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2021-0029.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-908" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-19T17:22:46Z",
    "nvd_published_at" : null
  }
}