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MEDIUM severity

CVE-2024-29857 — bcprov-jdk18on

MEDIUMFix: bcgit/bc-csharp@56daa6e

CVE-2024-29857 is a medium-severity (CVSS 5.3) Out-of-bounds Read vulnerability in org.bouncycastle:bcprov-jdk18on. A fix is available for org.bouncycastle:bcprov-jdk18on — see the affected versions and patch details below.

Bouncy Castle certificate parsing issues cause high CPU usage during parameter evaluation.

Also known asGHSA-8xfc-gm6g-vgpv
Published
Updated
Affected
10 pkgs
Patched
9 / 10
Exploits
None indexed
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2024-29857.

EPSS Exploitation Probability

via FIRST.org ↗
1.1%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs66th percentile — riskier than 66% of all scored CVEsHighest risk
0.00%0.53%1.07%1.60%0.3%1.1%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

10 pkgs affected
☕org.bouncycastle:bcprov-jdk18on☕org.bouncycastle:bcprov-jdk15on☕org.bouncycastle:bcprov-jdk15to18☕org.bouncycastle:bcprov-jdk14☕org.bouncycastle:bctls-jdk18on☕org.bouncycastle:bctls-jdk14☕org.bouncycastle:bctls-jdk15to18☕org.bouncycastle:bc-fips+2 more

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

An issue was discovered in ECCurve.java and ECCurve.cs in Bouncy Castle Java (BC Java) before 1.78, BC Java LTS before 2.73.6, BC-FJA before 1.0.2.5, and BC C# .Net before 2.3.1. Importing an EC certificate with crafted F2m parameters can lead to excessive CPU consumption during the evaluation of the curve parameters.

Affected Packages

10 total 9 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.bouncycastle:bcprov-jdk18onall versions1.78org.bouncycastle:bcprov-jdk18on:1.78
☕Mavenorg.bouncycastle:bcprov-jdk15onall versions1.78org.bouncycastle:bcprov-jdk15on:1.78
☕Mavenorg.bouncycastle:bcprov-jdk15to18all versions1.78org.bouncycastle:bcprov-jdk15to18:1.78
☕Mavenorg.bouncycastle:bcprov-jdk14all versions1.78org.bouncycastle:bcprov-jdk14:1.78
☕Mavenorg.bouncycastle:bctls-jdk18onall versions1.78org.bouncycastle:bctls-jdk18on:1.78
☕Mavenorg.bouncycastle:bctls-jdk14all versions1.78org.bouncycastle:bctls-jdk14:1.78

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.bouncycastle:bcprov-jdk18on, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.bouncycastle:bcprov-jdk18on to 1.78 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-29857 is resolved across your whole dependency graph.

  3. Workarounds

    Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

Moderate-impact issue in Red Hat products that include the affected Bouncy Castle component: an attacker who causes an EC certificate with crafted F2m parameters to be imported can trigger excessive CPU consumption while curve parameters are evaluated, resulting in denial of service. Red Hat rates this CVSS 6.5…

Workaround published by Red Hat
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Source: Red Hat security advisory for CVE-2024-29857 (CC BY 4.0)
ProductFixed inAdvisory
Red Hat AMQ Broker 7org.bouncycastle:bcprov-jdk18onRHSA-2024:4271
Red Hat build of Apache Camel 4.4.1 for Spring Boot 3.2org.bouncycastle:bcprov-jdk18onRHSA-2024:4884
Red Hat Build of Apache Camel 4.4 for Quarkus 3.8org.bouncycastle:bcprov-jdk18onRHSA-2024:4505
Red Hat build of Quarkus 3.8.5.redhatorg.bouncycastle/bcprov-jdk18on:1.78.1.redhat-00002RHSA-2024:4326
Red Hat JBoss Enterprise Application Platformorg.bouncycastle/bcprov-jdk18on:1.78.1.redhat-00002RHSA-2024:5147
Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8eap7-bouncycastle-0:1.78.1-1.redhat_00002.1.el8eapRHSA-2024:5144
Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 9eap7-bouncycastle-0:1.78.1-1.redhat_00002.1.el9eapRHSA-2024:5145
Red Hat JBoss Enterprise Application Platform 7.4 on RHEL 7eap7-bouncycastle-0:1.78.1-1.redhat_00002.1.el7eapRHSA-2024:5143

Frequently Asked Questions

An issue was discovered in ECCurve.java and ECCurve.cs in Bouncy Castle Java (BC Java) before 1.78, BC Java LTS before 2.73.6, BC-FJA before 1.0.2.5, and BC C# .Net before 2.3.1. Importing an EC certificate with crafted F2m parameters can lead to excessive CPU consumption during the evaluation of the curve parameters.
O3 Security · Impact-Aware SCA

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CVE-2024-29857: bcprov-jdk18on — Fixed in 1.78