CVE-2022-25898: Jsrsasign JWS And JWT Signature Validation Vulnerability

Q: What is CVE-2022-25898?

CVE-2022-25898 is a security vulnerability in Jsrsasign involving JWS and JWT signature validation vulnerability with special characters under CWE-347: Improper Verification of Cryptographic Signature.

Q: Which Jsrsasign versions are affected?

Affected versions include releases prior to 10.5.25 across affected packages: jsrsasign.

Q: What version fixes CVE-2022-25898?

Upgrading to 10.5.25 (or the latest patched release for your respective branch) resolves the vulnerability.

Q: Is jsrsasign affected?

Yes, jsrsasign is affected in releases prior to 10.5.25. Upgrade your dependency to 10.5.25 or later.

Q: What is the CVSS score of CVE-2022-25898?

CVE-2022-25898 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:H/A:N.

Q: What CWE is associated with CVE-2022-25898?

CVE-2022-25898 is classified under CWE-347: Improper Verification of Cryptographic Signature (The product does not verify, or incorrectly verifies, the cryptographic signature for data.).

Q: How can I check npm dependencies for CVE-2022-25898?

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.

HIGH

Advisory Identifier: GHSA-3fvg-4v2m-98jf

CVSS 8.6

CWE-347

Published 2022-06-25

Advisory Summary

CVE-2022-25898 is a HIGH (CVSS 8.6) jws and jwt signature validation vulnerability (CWE-347: Improper Verification of Cryptographic Signature) affecting Jsrsasign libraries in the npm ecosystem. The issue involves jws and jwt signature validation vulnerability with special characters. Remediation is available by upgrading affected packages to version 10.5.25.

CVE-2022-25898 at a Glance

CVE Identifier CVE-2022-25898

GHSA Identifier GHSA-3fvg-4v2m-98jf

Severity HIGH

CVSS v3.1 Base Score 8.6

CWE Classification CWE-347: Improper Verification of Cryptographic Signature

Affected Product Jsrsasign

Package Ecosystem npm

Published Date 2022-06-25

Last Updated 2022-07-05

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:H/A:N).

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 High (I:H)

Availability None (A:N)

How to Fix CVE-2022-25898

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: 10.5.25

npm install jsrsasign@10.5.25

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 CVE-2022-25898, 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 10.5.25), 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-347: Improper Verification of Cryptographic Signature, where the product does not verify, or incorrectly verifies, the cryptographic signature for data. 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 Jsrsasign supports JWS(JSON Web Signatures) and JWT(JSON Web Token) validation. However JWS or JWT signature with non Base64URL encoding special characters or number escaped characters may be validated as valid by mistake. For example, even if a string of non Base64URL encoding characters such as `!@$%` or `\11` is inserted into a valid JWS or JWT signature value string, it will still be a valid JWS or JWT signature by mistake. When jsrsasign's JWS or JWT validation is used in OpenID connect or OAuth2, this vulnerability will affect to authentication or authorization. By our internal assessment, CVSS 3.1 score will be 8.6. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N ### Patches Users validate JWS or JWT signatures should upgrade to 10.5.25. ### Workarounds Validate JWS or JWT signature if it has Base64URL and dot safe string before executing JWS.verify() or JWS.verifyJWT() method. ### ACKNOWLEDGEMENT Thanks to Adi Malyanker and Or David for this vulnerability report. Also thanks for [Snyk security team](https://snyk.io/) for this coordination. ### References https://github.com/kjur/jsrsasign/releases/tag/10.5.25 https://github.com/kjur/jsrsasign/security/advisories/GHSA-3fvg-4v2m-98jf kjur's advisories https://github.com/advisories/GHSA-3fvg-4v2m-98jf github advisories https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-25898 https://kjur.github.io/jsrsasign/api/symbols/KJUR.jws.JWS.html#.verifyJWT https://kjur.github.io/jsrsasign/api/symbols/KJUR.jws.JWS.html#.verify https://kjur.github.io/jsrsasign/api/symbols/global__.html#.isBase64URLDot https://github.com/kjur/jsrsasign/wiki/Tutorial-for-JWS-verification https://github.com/kjur/jsrsasign/wiki/Tutorial-for-JWT-verification https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-2869122

CVE-2022-25898 Affected Jsrsasign Versions

1 component(s)

Fixed Versions:

10.5.25

Product / Package	Ecosystem	Affected Versions	Fixed Version
jsrsasign npm/jsrsasign	npm	≥ 4.8.0 < 10.5.25	10.5.25

References

NVD — CVE-2022-25898 NVD

https://nvd.nist.gov/vuln/detail/CVE-2022-25898

Security Fix Commit FIX COMMIT

https://github.com/kjur/jsrsasign/commit/4536a6e9e8bcf1a644ab7c07ed96e453347dae41

MITRE CVE Database — CVE-2022-25898 MITRE

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-25898

Jsrsasign Source Repository REPOSITORY

https://github.com/kjur/jsrsasign

Jsrsasign Release RELEASE

https://github.com/kjur/jsrsasign/releases/tag/10.5.25

snyk.io/vuln/snyk-java-orgw... WEB

https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-2935898

snyk.io/vuln/snyk-java-orgw... WEB

https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBKJUR-2935897

snyk.io/vuln/snyk-java-orgw... WEB

https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2935896

snyk.io/vuln/snyk-js-jsrsas... WEB

https://snyk.io/vuln/SNYK-JS-JSRSASIGN-2869122

Frequently Asked Questions

What is CVE-2022-25898?

CVE-2022-25898 is a security vulnerability in Jsrsasign involving JWS and JWT signature validation vulnerability with special characters under CWE-347: Improper Verification of Cryptographic Signature.

Which Jsrsasign versions are affected?

Affected versions include releases prior to 10.5.25 across affected packages: jsrsasign.

What version fixes CVE-2022-25898?

Upgrading to 10.5.25 (or the latest patched release for your respective branch) resolves the vulnerability.

Is jsrsasign affected?

Yes, jsrsasign is affected in releases prior to 10.5.25. Upgrade your dependency to 10.5.25 or later.

What is the CVSS score of CVE-2022-25898?

CVE-2022-25898 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:H/A:N.

What CWE is associated with CVE-2022-25898?

CVE-2022-25898 is classified under CWE-347: Improper Verification of Cryptographic Signature (The product does not verify, or incorrectly verifies, the cryptographic signature for data.).

How can I check npm dependencies for CVE-2022-25898?

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-3fvg-4v2m-98jf",
  "modified" : "2022-07-05T21:25:54Z",
  "published" : "2022-06-25T07:19:06Z",
  "aliases" : [ "CVE-2022-25898" ],
  "summary" : "JWS and JWT signature validation vulnerability with special characters",
  "details" : "### Impact\n\nJsrsasign supports JWS(JSON Web Signatures) and JWT(JSON Web Token) validation. However JWS or JWT signature with non Base64URL encoding special characters or number escaped characters may be validated as valid by mistake.\n\nFor example, even if a string of non Base64URL encoding characters such as `!@$%` or `\\11` is inserted into a valid JWS or JWT signature value string, it will still be a valid JWS or JWT signature by mistake.\n\nWhen jsrsasign's JWS or JWT validation is used in OpenID connect or OAuth2, this vulnerability will affect to authentication or authorization.\n\nBy our internal assessment, CVSS 3.1 score will be 8.6.\nCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N\n\n### Patches\nUsers validate JWS or JWT signatures should upgrade to 10.5.25.\n\n### Workarounds\nValidate JWS or JWT signature if it has Base64URL and dot safe string before\nexecuting JWS.verify() or JWS.verifyJWT() method.\n\n### ACKNOWLEDGEMENT\n\nThanks to Adi Malyanker and Or David for this vulnerability report. Also thanks for [Snyk security team](https://snyk.io/) for this coordination.\n\n### References\nhttps://github.com/kjur/jsrsasign/releases/tag/10.5.25\nhttps://github.com/kjur/jsrsasign/security/advisories/GHSA-3fvg-4v2m-98jf kjur's advisories\nhttps://github.com/advisories/GHSA-3fvg-4v2m-98jf github advisories\nhttps://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-25898\nhttps://kjur.github.io/jsrsasign/api/symbols/KJUR.jws.JWS.html#.verifyJWT\nhttps://kjur.github.io/jsrsasign/api/symbols/KJUR.jws.JWS.html#.verify\nhttps://kjur.github.io/jsrsasign/api/symbols/global__.html#.isBase64URLDot\nhttps://github.com/kjur/jsrsasign/wiki/Tutorial-for-JWS-verification\nhttps://github.com/kjur/jsrsasign/wiki/Tutorial-for-JWT-verification\nhttps://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-2869122\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "jsrsasign"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.8.0"
      }, {
        "fixed" : "10.5.25"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-25898"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kjur/jsrsasign/commit/4536a6e9e8bcf1a644ab7c07ed96e453347dae41"
  }, {
    "type" : "WEB",
    "url" : "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-25898"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/kjur/jsrsasign"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kjur/jsrsasign/releases/tag/10.5.25"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-2935898"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBKJUR-2935897"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2935896"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JS-JSRSASIGN-2869122"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-347" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-06-25T07:19:06Z",
    "nvd_published_at" : "2022-07-01T20:15:00Z"
  }
}

CVSS V3

8.6 HIGH

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 High (I:H)

Availability None (A:N)

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

Advisory Metadata

Source ID: GHSA-3fvg-4v2m-98jf
Schema Version: 1.4.0
Published: 2022-06-25 07:19
Last Modified: 2022-07-05 21:25
Database Record File: advisories/github-reviewed/2022/06/GHSA-3fvg-4v2m-98jf/GHSA-3fvg-4v2m-98jf.json