GHSA-q3gh-5r98-j4h3

Suggest an improvement
Source
https://github.com/advisories/GHSA-q3gh-5r98-j4h3
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/06/GHSA-q3gh-5r98-j4h3/GHSA-q3gh-5r98-j4h3.json
JSON Data
https://api.test.osv.dev/v1/vulns/GHSA-q3gh-5r98-j4h3
Aliases
Published
2020-06-26T16:26:50Z
Modified
2023-11-01T04:51:55Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
RSA-PSS signature validation vulnerability by prepending zeros in jsrsasign
Details

Impact

Jsrsasign can verify RSA-PSS signature which value can expressed as BigInteger. When there is a valid RSA-PSS signature value, this vulnerability is also accept value with prepending zeros as a valid signature.

  • If you are not use RSA-PSS signature validation, this vulnerability is not affected.
  • Risk to accept a forged or crafted message to be signed is low.
  • Risk to raise memory corruption is low since jsrsasign uses BigInteger class.

Patches

Users using RSA-PSS signature validation should upgrade to 8.0.17.

Workarounds

Reject RSA-PSS signatures with unnecessary prepending zeros.

References

https://github.com/kjur/jsrsasign/security/advisories/GHSA-q3gh-5r98-j4h3 https://github.com/kjur/jsrsasign/issues/438 https://nvd.nist.gov/vuln/detail/CVE-2020-14968 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14968 https://vuldb.com/?id.157125 https://kjur.github.io/jsrsasign/api/symbols/RSAKey.html#.verifyWithMessageHashPSS

Database specific 
{
    "cwe_ids": [
        "CWE-119"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-06-26T16:19:52Z",
    "nvd_published_at": "2020-06-22T12:15:00Z",
    "severity": "CRITICAL"
}
References

Affected packages

npm / jsrsasign

Package

Name
jsrsasign
View open source insights on deps.dev
Purl
pkg:npm/jsrsasign

Affected ranges

Type
SEMVER
Events
Introduced
3.0.0
Fixed
8.0.17

Database specific

last_known_affected_version_range 
"< 8.0.16"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/06/GHSA-q3gh-5r98-j4h3/GHSA-q3gh-5r98-j4h3.json"