LibJWT has NULL/bounds validation in JWK octet and RSA PSS parsing
概要
LibJWT has NULL/bounds validation in JWK octet and RSA PSS parsing
原文の説明
取得元が公開している説明をそのまま載せています (多くは英語)。
LibJWT is a C JSON Web Token Library. Starting in version 3.0.0 and prior to version 3.3.0, the JWK parsing for RSA-PSS did not protect against a NULL value when expecting to parse JSON string values. A specially crafted JWK file could exploit this behavior by using integers in places where the code expected a string. This was fixed in v3.3.0. A workaround is available. Users importing keys through a JWK file should not do so from untrusted sources. Use the jwk2key tool to check for validity of a JWK file. Likewise, if possible, do not use JWK files with RSA-PSS keys.
出典: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
ディストリビューション別の修正状況
各ディストリビューションが公開している、この CVE の修正パッケージ
- Debian DEBIAN-CVE-2026-33996 libjwt3 修正版: 3.3.2-1
- Ubuntu UBUNTU-CVE-2026-33996 libjwt
参照URL
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- patch github.com