CVE-2023-39914: Bcder BER/CER/DER Decoder Panics On Invalid Vulnerability

HIGH
Advisory Identifier: GHSA-6jmw-6mxw-w4jc
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CVSS 7.5
CWE-228 CWE-232
Published
Advisory Summary

CVE-2023-39914 is a HIGH (CVSS 7.5) ber/cer/der decoder panics on invalid vulnerability (CWE-228: Improper Handling of Syntactically Invalid Structure) affecting Bcder libraries in the crates.io ecosystem. The issue involves ber/cer/der decoder panics on invalid input. Remediation is available by upgrading affected packages to version 0.7.3.

CVE-2023-39914 at a Glance

CVE Identifier CVE-2023-39914
GHSA Identifier GHSA-6jmw-6mxw-w4jc
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-228: Improper Handling of Syntactically Invalid Structure
Affected Product Bcder
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: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-2023-39914

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

bcder fixed: 0.7.3 
Upgrade bcder to 0.7.3
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 bcder

How to Check if You Are Affected

To determine whether your application is affected by CVE-2023-39914, inspect your project dependencies for Bcder:

inspect dependencies for bcder

Analyze the terminal output to locate any version of Bcder in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.7.3), 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-228: Improper Handling of Syntactically Invalid Structure, where the product does not handle or incorrectly handles input that is not syntactically well-formed with respect to the associated specification. In Bcder, 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

NLnet Labs’ bcder library up to and including version 0.7.2 panics while decoding certain invalid input data rather than rejecting the data with an error. This can affect both the actual decoding stage as well as accessing content of types that utilized delayed decoding.

CVE-2023-39914 Affected Bcder Versions

1 component(s)
Fixed Versions:
0.7.3
Product / Package Ecosystem Affected Versions Fixed Version
bcder
 crates.io
< 0.7.3
0.7.3

References

NVD — CVE-2023-39914 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-39914
Security Fix Commit FIX COMMIT
https://github.com/NLnetLabs/bcder/commit/4da91c3fd853e3d466d8581cf1d82b7f3255de56
Bcder Source Repository REPOSITORY
https://github.com/NLnetLabs/bcder
nlnetlabs.nl/downloads/bcder/cve... WEB
https://nlnetlabs.nl/downloads/bcder/CVE-2023-39914.txt
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2023-0062.html

Frequently Asked Questions

What is CVE-2023-39914?
CVE-2023-39914 is a security vulnerability in Bcder involving BER/CER/DER decoder panics on invalid input under CWE-228: Improper Handling of Syntactically Invalid Structure.
Which Bcder versions are affected?
Affected versions include releases prior to 0.7.3 across affected packages: bcder.
What version fixes CVE-2023-39914?
Upgrading to 0.7.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is bcder affected?
Yes, bcder is affected in releases prior to 0.7.3. Upgrade your dependency to 0.7.3 or later.
What is the CVSS score of CVE-2023-39914?
CVE-2023-39914 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-2023-39914?
CVE-2023-39914 is classified under CWE-228: Improper Handling of Syntactically Invalid Structure (The product does not handle or incorrectly handles input that is not syntactically well-formed with respect to the associated specification.).
How can I check crates.io dependencies for CVE-2023-39914?
Run the dependency tree command: 'inspect dependencies for bcder'. 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-6jmw-6mxw-w4jc",
  "modified" : "2024-09-11T18:45:42Z",
  "published" : "2023-09-13T15:31:14Z",
  "aliases" : [ "CVE-2023-39914" ],
  "summary" : "BER/CER/DER decoder panics on invalid input",
  "details" : "NLnet Labs’ bcder library up to and including version 0.7.2 panics while decoding certain invalid input data rather than rejecting the data with an error. This can affect both the actual decoding stage as well as accessing content of types that utilized delayed decoding.",
  "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" : "crates.io",
      "name" : "bcder"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.7.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-39914"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/NLnetLabs/bcder/commit/4da91c3fd853e3d466d8581cf1d82b7f3255de56"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/NLnetLabs/bcder"
  }, {
    "type" : "WEB",
    "url" : "https://nlnetlabs.nl/downloads/bcder/CVE-2023-39914.txt"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2023-0062.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-228", "CWE-232" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-09-14T16:41:57Z",
    "nvd_published_at" : "2023-09-13T15:15:07Z"
  }
}