CVE-2022-25898

HIGH8.6EPSS 1.8%

JWS and JWT signature validation vulnerability with special characters

發布日:2022/6/25修改日:2025/1/14

描述

### 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

受影響套件(1)

CVSS 分數

來源版本嚴重程度向量
osvCVSS 3.1HIGH8.6CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

參考連結(9)