CVE-2024-21484

Name: CVE-2024-21484
Creator: NVD / NIST
Published: 2024-01-22T05:15:08.72+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 0.96%

Last modified Jun 22, 2026

CVE-2024-21484 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. 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. EPSS estimates a 0.96% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

5.9/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.96%

57.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Kjur	Jsrsasign	< 11.0.0

References

https://github.com/kjur/jsrsasign/issues/598Exploit, Issue Tracking, Vendor Advisory
https://github.com/kjur/jsrsasign/releases/tag/11.0.0Patch, Release Notes
https://people.redhat.com/~hkario/marvin/
https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-6070734Patch, Third Party Advisory
https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBKJUR-6070733Patch, Third Party Advisory
https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-6070732Patch, Third Party Advisory
https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-6070731Patch, Third Party Advisory
https://github.com/kjur/jsrsasign/issues/598Exploit, Issue Tracking, Vendor Advisory
https://github.com/kjur/jsrsasign/releases/tag/11.0.0Patch, Release Notes
https://people.redhat.com/~hkario/marvin/
https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-6070734Patch, Third Party Advisory
https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBKJUR-6070733Patch, Third Party Advisory
https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-6070732Patch, Third Party Advisory
https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-6070731Patch, Third Party Advisory

Timeline

Published: Jan 22, 2024
Last Modified: Jun 22, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2024-21484?

How severe is CVE-2024-21484?

CVE-2024-21484 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 0.96% probability of exploitation in the next 30 days.

How do I fix CVE-2024-21484?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-21484?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST