CVE-2019-15549: Asn1 der Memory Exhaustion Vulnerability

HIGH
Advisory Identifier: GHSA-v5r6-6r3c-wqxc
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CVSS 7.5
CWE-400
Published
Advisory Summary

CVE-2019-15549 is a HIGH (CVSS 7.5) memory exhaustion vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Asn1 der libraries in the crates.io ecosystem. The issue involves memory exhaustion in asn1_der. Remediation is available by upgrading affected packages to version 0.6.2.

CVE-2019-15549 at a Glance

CVE Identifier CVE-2019-15549
GHSA Identifier GHSA-v5r6-6r3c-wqxc
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Asn1 der
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:3.0/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-2019-15549

To remediate this vulnerability, upgrade all affected Asn1 der dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

asn1_der fixed: 0.6.2 
Upgrade asn1_der to 0.6.2
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 asn1_der

How to Check if You Are Affected

To determine whether your application is affected by CVE-2019-15549, inspect your project dependencies for Asn1 der:

inspect dependencies for asn1_der

Analyze the terminal output to locate any version of Asn1 der in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.6.2), 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-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Asn1 der, 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 asn1_der crate before 0.6.2 for Rust. Attackers can trigger memory exhaustion by supplying a large value in a length field.

CVE-2019-15549 Affected Asn1 der Versions

1 component(s)
Fixed Versions:
0.6.2
Product / Package Ecosystem Affected Versions Fixed Version
asn1_der
 crates.io
< 0.6.2
0.6.2

References

NVD — CVE-2019-15549 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-15549
Asn1 der Source Repository REPOSITORY
https://github.com/KizzyCode/asn1_der/issues/1
Asn1 der Source Repository REPOSITORY
https://github.com/KizzyCode/asn1_der
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2019-0007.html

Frequently Asked Questions

What is CVE-2019-15549?
CVE-2019-15549 is a security vulnerability in Asn1 der involving Memory exhaustion in asn1_der under CWE-400: Uncontrolled Resource Consumption.
Which Asn1 der versions are affected?
Affected versions include releases prior to 0.6.2 across affected packages: asn1_der.
What version fixes CVE-2019-15549?
Upgrading to 0.6.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is asn1_der affected?
Yes, asn1_der is affected in releases prior to 0.6.2. Upgrade your dependency to 0.6.2 or later.
What is the CVSS score of CVE-2019-15549?
CVE-2019-15549 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2019-15549?
CVE-2019-15549 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check crates.io dependencies for CVE-2019-15549?
Run the dependency tree command: 'inspect dependencies for asn1_der'. 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-v5r6-6r3c-wqxc",
  "modified" : "2021-08-19T21:22:28Z",
  "published" : "2021-08-25T20:44:56Z",
  "aliases" : [ "CVE-2019-15549" ],
  "summary" : "Memory exhaustion in asn1_der",
  "details" : "An issue was discovered in the asn1_der crate before 0.6.2 for Rust. Attackers can trigger memory exhaustion by supplying a large value in a length field.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "asn1_der"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.6.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-15549"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/KizzyCode/asn1_der/issues/1"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/KizzyCode/asn1_der"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2019-0007.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-19T21:22:28Z",
    "nvd_published_at" : null
  }
}