CVE-2026-4601
Versions of the package jsrsasign before 11.1.1 are vulnerable to Missing Cryptographic Step via the KJUR.crypto.DSA.signWithMessageHash process in the DSA signing implementation. An attacker can recover the private key by forcing r or s to be zero, so the library emits an invalid signature without retrying, and then solves for x from the resulting signature.
Słabość
Versions of the package jsrsasign before 11.1.1 are vulnerable to Missing Cryptographic Step via the KJUR.crypto.DSA.signWithMessageHash process in the DSA signing implementation. An attacker can recover the private key by forcing r or s to be zero, so the library emits an invalid signature without retrying, and then solves for x from the resulting signature.
Produkty, których dotyczy
- kjur jsrsasign
Źródła
- https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586
- https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0eb
- https://github.com/kjur/jsrsasign/pull/645
- https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-15812269
- https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370941
- https://access.redhat.com/errata/RHSA-2026:19375
Znajdź błąd, zanim zrobi to atakujący.
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