CVE-2024-34447 Bouncy Castle Java Cryptography API vulnerable to DNS poisoning
Attackers can bypass hostname verification in Bouncy Castle TLS when using HttpsURLConnection, enabling DNS poisoning attacks against Java applications.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-34447?
CVE-2024-34447 is a high-severity vulnerability in n/a, published on 3 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 the Bouncy Castle Crypto Package For Java before BC TLS Java 1.0.19 (ships with BC Java 1.78, BC Java (LTS) 2.73.6) and before BC FIPS TLS Java 1.0.19. When endpoint identification is enabled in the BCJSSE and an SSL socket is created without an explicit hostname (as happens with HttpsURLConnection), hostname verification could be performed against a DNS-resolved IP address in some situations, opening up a possibility of DNS poisoning.
Weakness: CWE-297
Which versions are affected by CVE-2024-34447?
14 open source packages ship an affected version, including org.bouncycastle:bcprov-jdk12, org.bouncycastle:bcprov-jdk14 and org.bouncycastle:bcprov-jdk15on.
| Package | Affected | Fixed in |
|---|---|---|
org.bouncycastle:bcprov-jdk12 Maven | From 1.61 | 1.78 |
org.bouncycastle:bcprov-jdk12 Maven | From 1.61 | 1.78 |
org.bouncycastle:bcprov-jdk14 Maven | From 1.61 | 1.78 |
org.bouncycastle:bcprov-jdk14 Maven | From 1.61 | 1.78 |
org.bouncycastle:bcprov-jdk15on Maven | From 1.61 | 1.78 |
org.bouncycastle:bcprov-jdk15on Maven | From 1.61 | 1.78 |
8 more packages
org.bouncycastle:bcprov-jdk15to18 Maven | From 1.61 | 1.78 |
org.bouncycastle:bcprov-jdk15to18 Maven | From 1.61 | 1.78 |
org.bouncycastle:bcprov-jdk18on Maven | From 1.61 | 1.78 |
org.bouncycastle:bcprov-jdk18on Maven | From 1.61 | 1.78 |
org.bouncycastle:bcprov-lts8on Maven | All versions | 2.73.6 |
org.bouncycastle:bcprov-lts8on Maven | All versions | 2.73.6 |
org.bouncycastle:bctls-fips Maven | All versions | 1.0.19 |
org.bouncycastle:bctls-fips Maven | All versions | 1.0.19 |
How do I fix CVE-2024-34447?
Upgrade org.bouncycastle:bcprov-jdk12 to 1.78 or later.
Is CVE-2024-34447 being exploited?
There is no known exploitation of CVE-2024-34447 in the wild and no public exploit code.
Sources
Also known as CLEANSTART-2026-WG07848, DEBIAN-CVE-2024-34447, GHSA-4h8f-2wvx-gg5w, MINI-7g5j-9696-vg78, ROOT-APP-MAVEN-CVE-2024-34447, UBUNTU-CVE-2024-34447.