CVE-2023-42447: Blurhash Blurhash Panics On Parsing Crafted Vulnerability

HIGH
Advisory Identifier: GHSA-cxvp-82cq-57h2
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CVSS 8.6
CWE-392 CWE-1284
Published
Advisory Summary

CVE-2023-42447 is a HIGH (CVSS 8.6) blurhash panics on parsing crafted vulnerability (CWE-392: Missing Report of Error Condition) affecting Blurhash libraries in the crates.io ecosystem. The issue involves blurhash panics on parsing crafted inputs. Remediation is available by upgrading affected packages to version 0.2.0.

CVE-2023-42447 at a Glance

CVE Identifier CVE-2023-42447
GHSA Identifier GHSA-cxvp-82cq-57h2
Severity HIGH
CVSS v3.1 Base Score 8.6
CWE Classification CWE-392: Missing Report of Error Condition
Affected Product Blurhash
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 8.6

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:C/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 Changed (S:C)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2023-42447

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

blurhash fixed: 0.2.0 
Upgrade blurhash to 0.2.0
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 blurhash

How to Check if You Are Affected

To determine whether your application is affected by CVE-2023-42447, inspect your project dependencies for Blurhash:

inspect dependencies for blurhash

Analyze the terminal output to locate any version of Blurhash in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.2.0), 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-392: Missing Report of Error Condition, where the product encounters an error but does not provide a status code or return value to indicate that an error has occurred. In Blurhash, 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

### Impact The blurhash parsing code may panic due to multiple panic-guarded out-of-bounds accesses on untrusted input. In a typical deployment, this may get triggered by feeding a maliciously crafted blurhashes over the network. These may include: - UTF-8 compliant strings containing multi-byte UTF-8 characters ### Patches The patches will be released under version 0.2.0, which requires user intervention because of slight API churn. ### Workarounds n.a. ### References n.a.

CVE-2023-42447 Affected Blurhash Versions

1 component(s)
Fixed Versions:
0.2.0
Product / Package Ecosystem Affected Versions Fixed Version
blurhash
 crates.io
≥ 0.1.1
< 0.2.0
All 1 versions
0.1.1
0.2.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/whisperfish/blurhash-rs/security/advisories/GHSA-cxvp-82cq-57h2
NVD — CVE-2023-42447 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-42447
Blurhash Source Repository REPOSITORY
https://github.com/whisperfish/blurhash-rs
Blurhash Release RELEASE
https://github.com/whisperfish/blurhash-rs/releases/tag/v0.2.0

Frequently Asked Questions

What is CVE-2023-42447?
CVE-2023-42447 is a security vulnerability in Blurhash involving blurhash panics on parsing crafted inputs under CWE-392: Missing Report of Error Condition.
Which Blurhash versions are affected?
Affected versions include releases prior to 0.2.0 across affected packages: blurhash.
What version fixes CVE-2023-42447?
Upgrading to 0.2.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is blurhash affected?
Yes, blurhash is affected in releases prior to 0.2.0. Upgrade your dependency to 0.2.0 or later.
What is the CVSS score of CVE-2023-42447?
CVE-2023-42447 has a CVSS v3.1 base score of 8.6 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
What CWE is associated with CVE-2023-42447?
CVE-2023-42447 is classified under CWE-392: Missing Report of Error Condition (The product encounters an error but does not provide a status code or return value to indicate that an error has occurred.).
How can I check crates.io dependencies for CVE-2023-42447?
Run the dependency tree command: 'inspect dependencies for blurhash'. 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-cxvp-82cq-57h2",
  "modified" : "2023-09-21T17:10:22Z",
  "published" : "2023-09-21T17:10:22Z",
  "aliases" : [ "CVE-2023-42447" ],
  "summary" : "blurhash panics on parsing crafted inputs",
  "details" : "### Impact\nThe blurhash parsing code may panic due to multiple panic-guarded out-of-bounds accesses on untrusted input.\n\nIn a typical deployment, this may get triggered by feeding a maliciously crafted blurhashes over the network. These may include:\n- UTF-8 compliant strings containing multi-byte UTF-8 characters\n\n### Patches\nThe patches will be released under version 0.2.0, which requires user intervention because of slight API churn.\n\n### Workarounds\nn.a.\n\n### References\nn.a.\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "blurhash"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.1.1"
      }, {
        "fixed" : "0.2.0"
      } ]
    } ],
    "versions" : [ "0.1.1" ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/whisperfish/blurhash-rs/security/advisories/GHSA-cxvp-82cq-57h2"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-42447"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/whisperfish/blurhash-rs"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/whisperfish/blurhash-rs/releases/tag/v0.2.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1284", "CWE-392" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-09-21T17:10:22Z",
    "nvd_published_at" : "2023-09-19T15:15:57Z"
  }
}