CVE-2023-33202

Name: CVE-2023-33202
Creator: NVD / NIST
Published: 2023-11-23T16:15:07.273+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.93%

Last modified Jun 17, 2026

CVE-2023-33202 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Bouncy Castle for Java before 1.73 contains a potential Denial of Service (DoS) issue within the Bouncy Castle org.bouncycastle.openssl.PEMParser class. This class parses OpenSSL PEM encoded streams containing X.509 certificates, PKCS8 encoded keys, and PKCS7 objects. EPSS estimates a 0.93% chance of exploitation in the next 30 days.

Description

Bouncy Castle for Java before 1.73 contains a potential Denial of Service (DoS) issue within the Bouncy Castle org.bouncycastle.openssl.PEMParser class. This class parses OpenSSL PEM encoded streams containing X.509 certificates, PKCS8 encoded keys, and PKCS7 objects. Parsing a file that has crafted ASN.1 data through the PEMParser causes an OutOfMemoryError, which can enable a denial of service attack. (For users of the FIPS Java API: BC-FJA 1.0.2.3 and earlier are affected; BC-FJA 1.0.2.4 is fixed.)

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.93%

56.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Bouncycastle	Bouncy Castle For Java	< 1.73
Bouncycastle	Fips Java Api	< 1.0.2.4

References

https://bouncycastle.orgProduct
https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902023%E2%80%9033202
https://github.com/bcgit/bc-java/wiki/CVE-2023-33202Exploit, Third Party Advisory
https://security.netapp.com/advisory/ntap-20240125-0001/Third Party Advisory
https://bouncycastle.orgProduct
https://github.com/bcgit/bc-java/wiki/CVE-2023-33202Exploit, Third Party Advisory
https://security.netapp.com/advisory/ntap-20240125-0001/Third Party Advisory

Timeline

Published: Nov 23, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-33202?

How severe is CVE-2023-33202?

CVE-2023-33202 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.93% probability of exploitation in the next 30 days.

How do I fix CVE-2023-33202?

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-2023-33202?

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

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Source: NVD / NIST