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Ubuntu 24.04 LTS Bouncy Castle Major LDAP DoS DNS Spoofing USN-8109-1

ubuntu
Calendar Grey March 18, 2026
Dist Ubuntu Esm H88
Critical security issues were fixed in Bouncy Castle on multiple Ubuntu versions, addressing significant exploits
Several security issues were fixed in Bouncy Castle.

Summary

Several security issues were fixed in Bouncy Castle.

Software Description:

- bouncycastle: Java implementation of cryptographic algorithms

Details:

It was discovered that Bouncy Castle did not sanitize user input when

inserting it into an LDAP search filter. An attacker could possibly use

this issue to perform an LDAP injection attack. This issue only affected

Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS.

(CVE-2023-33201)

It was discovered that Bouncy Castle incorrectly handled specially crafted

F2m parameters in the ECCurve algorithm. An attacker could possibly use

this issue to cause Bouncy Castle to use excessive resources, leading to a

denial of service. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04

LTS, Ubuntu 22.04 LTS, and Ubuntu 24.04 LTS. (CVE-2024-29857)

It was discovered that Bouncy Castle leaked timing information when

handling exceptions during an RSA handshake. An attacker could possibly use

this issue to obtain sensitive i...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical dns poisoning ldap injection Bouncy Castle

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 24.04 LTS
  libbcjmail-java                 1.77-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libbcmail-java                  1.77-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libbcpg-java                    1.77-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libbcpkix-java                  1.77-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libbcprov-java                  1.77-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libbctls-java                   1.77-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libbcutil-java                  1.77-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro

Ubuntu 22.04 LTS
  libbcmail-java                  1.68-5ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libbcpg-java                    1.68-5ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libbcpkix-java                  1.68-5ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libbcprov-java                  1.68-5ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libbctls-java                   1.68-5ubuntu0.1~esm1
                                  Available with Ubuntu Pro

Ubuntu 20.04 LTS
  libbcmail-java                  1.61-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libbcpg-java                    1.61-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libbcpkix-java                  1.61-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libbcprov-java                  1.61-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  libbcmail-java                  1.59-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libbcpg-java                    1.59-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libbcpkix-java                  1.59-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  libbcprov-java                  1.59-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  libbcmail-java                  1.51-4ubuntu1+esm1
                                  Available with Ubuntu Pro
  libbcpg-java                    1.51-4ubuntu1+esm1
                                  Available with Ubuntu Pro
  libbcpkix-java                  1.51-4ubuntu1+esm1
                                  Available with Ubuntu Pro
  libbcprov-java                  1.51-4ubuntu1+esm1
                                  Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-8108-1

CVE-2023-33201, CVE-2024-29857, CVE-2024-30171, CVE-2024-30172,

CVE-2024-34447, CVE-2025-8916

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8108-1

Topics%20covered

Topics Covered

security advisory denial of service critical dns poisoning ldap injection Bouncy Castle

Package Information

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