GHSA-xxxq-chmp-67g4

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Source
https://github.com/advisories/GHSA-xxxq-chmp-67g4
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/06/GHSA-xxxq-chmp-67g4/GHSA-xxxq-chmp-67g4.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-xxxq-chmp-67g4
Aliases
Published
2020-06-26T16:27:08Z
Modified
2023-11-08T04:02:28Z
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 PKCS#1 decryption vulnerability with prepending zeros in jsrsasign
Details

Impact

Jsrsasign supports RSA PKCS#1 v1.5 (i.e. RSAES-PKCS1-v1_5) and RSA-OAEP encryption and decryption. Its encrypted message is represented as BigInteger. When there is a valid encrypted message, a crafted message with prepending zeros can be decrypted by this vulnerability.

  • If you don't use RSA PKCS1-v1_5 or RSA-OAEP decryption, this vulnerability is not affected.
  • Risk to forge contents of encrypted message is very low.
  • Risk to raise memory corruption is low since jsrsasign uses BigInteger class.

Patches

Users using RSA PKCS1-v1_5 or RSA-OAEP decryption should upgrade to 8.0.18.

Workarounds

Reject RSA PKCS1-v1_5 or RSA-OAEP encrypted message with unnecessary prepending zeros.

References

https://nvd.nist.gov/vuln/detail/CVE-2020-14967 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14967 https://vuldb.com/?id.157124 https://kjur.github.io/jsrsasign/api/symbols/KJUR.crypto.Cipher.html#.decrypt https://github.com/kjur/jsrsasign/issues/439

Database specific 
{
    "cwe_ids":  [
        "CWE-119"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2020-06-26T16:26:32Z",
    "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
0 Unknown introduced version / All previous versions are affected
Fixed
8.0.18

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/06/GHSA-xxxq-chmp-67g4/GHSA-xxxq-chmp-67g4.json"