CVE-2024-30171 Bouncy Castle affected by timing side-channel for RSA key exchange ("The Marvin Attack")
Medium 5.9
Published
Updated
Check this codebase for CVE-2024-30171 and fix it if it is affected.
What it is: CVE-2024-30171 is a medium-severity 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.
Exploitation: There is no known exploitation of CVE-2024-30171 in the wild and no public exploit code.
Affected packages and fixed versions:
- org.bouncycastle:bcprov-jdk14 (Maven): affected all versions; fixed in 1.78
- org.bouncycastle:bcprov-jdk14 (Maven): affected all versions; fixed in 1.78
- org.bouncycastle:bcprov-jdk15on (Maven): affected all versions; fixed in 1.78
- org.bouncycastle:bcprov-jdk15on (Maven): affected all versions; fixed in 1.78
- org.bouncycastle:bcprov-jdk15to18 (Maven): affected all versions; fixed in 1.78
- org.bouncycastle:bcprov-jdk15to18 (Maven): affected all versions; fixed in 1.78
- org.bouncycastle:bcprov-jdk18on (Maven): affected all versions; fixed in 1.78
- org.bouncycastle:bcprov-jdk18on (Maven): affected all versions; fixed in 1.78
- org.bouncycastle:bctls-fips (Maven): affected all versions; fixed in 1.0.19
- org.bouncycastle:bctls-fips (Maven): affected all versions; fixed in 1.0.19
- org.bouncycastle:bctls-jdk14 (Maven): affected all versions; fixed in 1.78
- org.bouncycastle:bctls-jdk14 (Maven): affected all versions; fixed in 1.78
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2024-30171/ (Markdown: https://insights.sbomify.com/CVE-2024-30171/index.md)
Attackers can exploit timing side-channels in RSA handshakes to leak sensitive information from Bouncy Castle Java TLS implementations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-30171?
CVE-2024-30171 is a medium-severity 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 Bouncy Castle Java TLS API and JSSE Provider before 1.78. Timing-based leakage may occur in RSA based handshakes because of exception processing.
Weakness: CWE-203
Which versions are affected by CVE-2024-30171?
20 open source packages ship an affected version, including org.bouncycastle:bcprov-jdk14, org.bouncycastle:bcprov-jdk15on and org.bouncycastle:bcprov-jdk15to18.
| Package | Affected | Fixed in |
|---|---|---|
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 |
org.bouncycastle:bcprov-jdk15to18 Maven | All versions | 1.78 |
org.bouncycastle:bcprov-jdk15to18 Maven | All versions | 1.78 |
14 more packages
org.bouncycastle:bcprov-jdk18on Maven | All versions | 1.78 |
org.bouncycastle:bcprov-jdk18on Maven | All versions | 1.78 |
org.bouncycastle:bctls-fips Maven | All versions | 1.0.19 |
org.bouncycastle:bctls-fips Maven | All versions | 1.0.19 |
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 (15)
bouncycastle SUSE:Enterprise Storage 7.1 | All versions | 1.78.1-150200.3.29.1 |
bouncycastle SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | All versions | 1.78.1-150200.3.29.1 |
bouncycastle SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | All versions | 1.78.1-150200.3.29.1 |
bouncycastle SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | All versions | 1.78.1-150200.3.29.1 |
bouncycastle SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS | All versions | 1.78.1-150200.3.29.1 |
bouncycastle SUSE:Linux Enterprise Module for Development Tools 15 SP5 | All versions | 1.78.1-150200.3.29.1 |
bouncycastle SUSE:Linux Enterprise Module for Development Tools 15 SP6 | All versions | 1.78.1-150200.3.29.1 |
bouncycastle SUSE:Linux Enterprise Server 15 SP2-LTSS | All versions | 1.78.1-150200.3.29.1 |
bouncycastle SUSE:Linux Enterprise Server 15 SP3-LTSS | All versions | 1.78.1-150200.3.29.1 |
bouncycastle SUSE:Linux Enterprise Server 15 SP4-LTSS | All versions | 1.78.1-150200.3.29.1 |
bouncycastle SUSE:Linux Enterprise Server for SAP Applications 15 SP2 | All versions | 1.78.1-150200.3.29.1 |
bouncycastle SUSE:Linux Enterprise Server for SAP Applications 15 SP3 | All versions | 1.78.1-150200.3.29.1 |
bouncycastle SUSE:Linux Enterprise Server for SAP Applications 15 SP4 | All versions | 1.78.1-150200.3.29.1 |
bouncycastle openSUSE:Leap 15.5 | All versions | 1.78.1-150200.3.29.1 |
bouncycastle openSUSE:Leap 15.6 | All versions | 1.78.1-150200.3.29.1 |
How do I fix CVE-2024-30171?
Upgrade org.bouncycastle:bcprov-jdk14 to 1.78 or later.
Is CVE-2024-30171 being exploited?
There is no known exploitation of CVE-2024-30171 in the wild and no public exploit code.
Sources
Also known as CLEANSTART-2026-XT25506, CLEANSTART-2026-YR80525, DEBIAN-CVE-2024-30171, GHSA-v435-xc8x-wvr9, MINI-j94h-8875-98rh, ROOT-APP-MAVEN-CVE-2024-30171 and 3 more.