GHSA-g753-jx37-7xwh: Jsrsasign ECDSA Signature Vulnerability Of Minerva Vulnerability

MODERATE
Share
CVSS 5.9
CWE-362
Published
Advisory Summary

GHSA-g753-jx37-7xwh is a MODERATE (CVSS 5.9) ecdsa signature vulnerability of minerva vulnerability (CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')) affecting Jsrsasign libraries in the npm ecosystem. The issue involves ecdsa signature vulnerability of minerva timing attack in jsrsasign. Remediation is available by upgrading affected packages to version 8.0.13.

GHSA-g753-jx37-7xwh at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-g753-jx37-7xwh
Severity MODERATE
CVSS v3.1 Base Score 5.9
CWE Classification CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Affected Product Jsrsasign
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 5.9

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N).

Attack Vector Adjacent (AV:A)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity High (I:H)
Availability None (A:N)

How to Fix GHSA-g753-jx37-7xwh

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

jsrsasign fixed: 8.0.13 
npm install jsrsasign@8.0.13
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls jsrsasign

How to Check if You Are Affected

To determine whether your Node.js application is affected by GHSA-g753-jx37-7xwh, inspect your project dependencies using npm:

npm ls jsrsasign

Analyze the terminal output to locate any version of Jsrsasign in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 8.0.13), your application is affected.

Note: The npm ls jsrsasign command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'), where the product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently. In Jsrsasign, 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 ECDSA side-channel attack named [Minerava](https://minerva.crocs.fi.muni.cz/) have been found and it was found that it affects to jsrsasign. Execution time of thousands signature generation have been observed then EC private key which is scalar value may be recovered since point and scalar multiplication time depends on bits of scalar. In jsrsasign 8.0.13 or later, execution time of EC point and scalar multiplication is almost constant and fixed for the issue. - Minerva is one of timing attack or side channel attack for EC. - If you don't use ECDSA class, you are not affected the vulnerability. - The vulnerability is that attacker may guess private key by checking processing time of EC key generation or ECDSA signing. - The cause issue is that point multiplication processing time in ECDSA signing is depends on private key value. - After 8.0.13, processing time of point multiplication in ECDSA signing have become constant for key value in theory. ### Patches Users using ECDSA signature generation should upgrade to 8.0.13 or later. ### Workarounds There is no workarounds in jsrsasign. Update jsrsasign or use other ECDSA library. ### ACKNOWLEDGEMENT Thanks to Jan Jancar @J08nY, Petr Svenda and Vladimir Sedlacek of Masaryk University in Czech Republic to find and report this vulnerability. ### References https://minerva.crocs.fi.muni.cz/ https://www.npmjs.com/advisories/1505 https://github.com/kjur/jsrsasign/issues/411

GHSA-g753-jx37-7xwh Affected Jsrsasign Versions

1 component(s)
Fixed Versions:
8.0.13
Product / Package Ecosystem Affected Versions Fixed Version
jsrsasign
npm/jsrsasign
npm
≥ 4.0.0
< 8.0.13
8.0.13

References

GitHub Advisory / Wiki ADVISORY
https://github.com/kjur/jsrsasign/security/advisories/GHSA-g753-jx37-7xwh
Jsrsasign Source Repository REPOSITORY
https://github.com/kjur/jsrsasign/issues/411
Security Fix Commit FIX COMMIT
https://github.com/kjur/jsrsasign/commit/9dcb89c57408a3d4b5b66aa9138426bd92819e73
Jsrsasign Source Repository REPOSITORY
https://github.com/kjur/jsrsasign
Jsrsasign Release RELEASE
https://github.com/kjur/jsrsasign/releases/tag/8.0.13
minerva.crocs.fi.muni.cz WEB
https://minerva.crocs.fi.muni.cz
snyk.io/vuln/snyk-js-jsrsas... WEB
https://snyk.io/vuln/SNYK-JS-JSRSASIGN-561755
www.npmjs.com/advisories/1505 WEB
https://www.npmjs.com/advisories/1505

Frequently Asked Questions

What is GHSA-g753-jx37-7xwh?
GHSA-g753-jx37-7xwh is a security vulnerability in Jsrsasign involving ECDSA signature vulnerability of Minerva timing attack in jsrsasign under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition').
Which Jsrsasign versions are affected?
Affected versions include releases prior to 8.0.13 across affected packages: jsrsasign.
What version fixes GHSA-g753-jx37-7xwh?
Upgrading to 8.0.13 (or the latest patched release for your respective branch) resolves the vulnerability.
Is jsrsasign affected?
Yes, jsrsasign is affected in releases prior to 8.0.13. Upgrade your dependency to 8.0.13 or later.
What is the CVSS score of GHSA-g753-jx37-7xwh?
GHSA-g753-jx37-7xwh has a CVSS v3.1 base score of 5.9 (MODERATE) with vector string CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N.
What CWE is associated with GHSA-g753-jx37-7xwh?
GHSA-g753-jx37-7xwh is classified under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') (The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.).
How can I check npm dependencies for GHSA-g753-jx37-7xwh?
Run the dependency tree command: 'npm ls jsrsasign'. 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-g753-jx37-7xwh",
  "modified" : "2021-09-22T18:43:42Z",
  "published" : "2020-06-30T16:05:08Z",
  "aliases" : [ ],
  "summary" : "ECDSA signature vulnerability of Minerva timing attack in jsrsasign",
  "details" : "### Impact\nECDSA side-channel attack named [Minerava](https://minerva.crocs.fi.muni.cz/) have been found and it was found that it affects to jsrsasign.\n\nExecution time of thousands signature generation have been observed then EC private key which is scalar value may be recovered since point and scalar multiplication time depends on bits of scalar. In jsrsasign 8.0.13 or later, execution time of EC point and scalar multiplication is almost constant and fixed for the issue.\n\n- Minerva is one of timing attack or side channel attack for EC.\n- If you don't use ECDSA class, you are not affected the vulnerability.\n- The vulnerability is that attacker may guess private key by checking processing time of EC key generation or ECDSA signing.\n- The cause issue is that point multiplication processing time in ECDSA signing is depends on private key value.\n- After 8.0.13, processing time of point multiplication in ECDSA signing have become constant for key value in theory.\n\n### Patches\nUsers using ECDSA signature generation should upgrade to 8.0.13 or later.\n\n### Workarounds\nThere is no workarounds in jsrsasign. Update jsrsasign or use other ECDSA library.\n\n### ACKNOWLEDGEMENT\nThanks to Jan Jancar @J08nY, Petr Svenda and Vladimir Sedlacek of Masaryk University in Czech Republic to find and report this vulnerability.\n\n### References\nhttps://minerva.crocs.fi.muni.cz/\nhttps://www.npmjs.com/advisories/1505\nhttps://github.com/kjur/jsrsasign/issues/411",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "jsrsasign"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0"
      }, {
        "fixed" : "8.0.13"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/kjur/jsrsasign/security/advisories/GHSA-g753-jx37-7xwh"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kjur/jsrsasign/issues/411"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kjur/jsrsasign/commit/9dcb89c57408a3d4b5b66aa9138426bd92819e73"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/kjur/jsrsasign"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kjur/jsrsasign/releases/tag/8.0.13"
  }, {
    "type" : "WEB",
    "url" : "https://minerva.crocs.fi.muni.cz"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JS-JSRSASIGN-561755"
  }, {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/advisories/1505"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-362" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-29T19:33:15Z",
    "nvd_published_at" : null
  }
}