Marvin Attack of RSA and RSAOAEP decryption in jsrsasign

中 5.9CVE-2024-21484 · GHSA-rh63-9qcf-83gf · 22/01/2024 公開 · 22/06/2026 更新

要点

CVE-2024-21484 は jsrsasign (kjur), jsrsasign に影響する深刻度「中」 (CVSS 5.9) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.96%（全脆弱性の 61.5% より高い）。
対処：11.0.0 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
jsrsasign kjur	`< 11.0.0`	`11.0.0`
jsrsasign npm	`< 11.0.0`	`11.0.0`

概要

Impact

RSA PKCS#1.5 or RSAOAEP ciphertexts may be decrypted by this Marvin attack vulnerability.

Patches

update to jsrsasign 11.0.0.

Workarounds

Find and replace RSA and RSAOAEP decryption with other crypto library.

References

https://people.redhat.com/~hkario/marvin/ https://github.com/kjur/jsrsasign/issues/598 https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-6070732 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-21484

NVD の説明

Versions of the package jsrsasign before 11.0.0 are vulnerable to Observable Discrepancy via the RSA PKCS1.5 or RSAOAEP decryption process. An attacker can decrypt ciphertexts by exploiting the Marvin security flaw. Exploiting this vulnerability requires the attacker to have access to a large number of ciphertexts encrypted with the same key. Workaround The vulnerability can be mitigated by finding and replacing RSA and RSAOAEP decryption with another crypto library.