CVE-2024-29857 Bouncy Castle certificate parsing issues cause high CPU usage during parameter evaluation.
Attackers can cause excessive CPU consumption and denial of service by importing EC certificates with crafted F2m parameters in Bouncy Castle libraries.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-29857?
CVE-2024-29857 is a high-severity denial of service vulnerability in n/a, published on 9 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-125
Which versions are affected by CVE-2024-29857?
20 open source packages ship an affected version, including org.bouncycastle:bc-fips, org.bouncycastle:bcprov-jdk14 and org.bouncycastle:bcprov-jdk15on.
| Package | Affected | Fixed in |
|---|---|---|
org.bouncycastle:bc-fips Maven | All versions | 1.0.2.5 |
org.bouncycastle:bc-fips Maven | All versions | 1.0.2.5 |
org.bouncycastle:bcprov-jdk14 Maven | All versions | 1.78 |
org.bouncycastle:bcprov-jdk14 Maven | All versions | 1.78 |
org.bouncycastle:bcprov-jdk15on Maven | All versions | 1.78 |
org.bouncycastle:bcprov-jdk15on Maven | All versions | 1.78 |
14 more packages
org.bouncycastle:bcprov-jdk15to18 Maven | All versions | 1.78 |
org.bouncycastle:bcprov-jdk15to18 Maven | All versions | 1.78 |
org.bouncycastle:bcprov-jdk18on Maven | All versions | 1.78 |
org.bouncycastle:bcprov-jdk18on Maven | All versions | 1.78 |
org.bouncycastle:bctls-jdk14 Maven | All versions | 1.78 |
org.bouncycastle:bctls-jdk14 Maven | All versions | 1.78 |
org.bouncycastle:bctls-jdk15to18 Maven | All versions | 1.78 |
org.bouncycastle:bctls-jdk15to18 Maven | All versions | 1.78 |
org.bouncycastle:bctls-jdk18on Maven | All versions | 1.78 |
org.bouncycastle:bctls-jdk18on Maven | All versions | 1.78 |
BouncyCastle NuGet | All versions | None |
BouncyCastle NuGet | All versions | None |
BouncyCastle.Cryptography NuGet | All versions | 2.3.1 |
BouncyCastle.Cryptography NuGet | All versions | 2.3.1 |
Linux distribution packages (1)
itextpdf openSUSE:Tumbleweed | All versions | 5.5.13.4-1.1 |
How do I fix CVE-2024-29857?
Upgrade org.bouncycastle:bc-fips to 1.0.2.5 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-29857 being exploited?
There is no known exploitation of CVE-2024-29857 in the wild and no public exploit code.
Sources
Also known as CLEANSTART-2026-GK84785, CLEANSTART-2026-YK68946, CLSA-2026-1781052750, DEBIAN-CVE-2024-29857, GHSA-8xfc-gm6g-vgpv, MINI-783x-vwmm-xfm8 and 6 more.