CVE-2024-29857

Publication date 14 May 2024

Last updated 18 March 2026

Ubuntu priority

Cvss 3 Severity Score

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
bouncycastle	25.10 questing	Not affected
	25.04 plucky	Ignored end of life, was needs-triage
	24.10 oracular	Ignored end of life, was needs-triage
	24.04 LTS noble	Fixed 1.77-1ubuntu0.1~esm1
	23.10 mantic	Ignored end of life, was needs-triage
	22.04 LTS jammy	Fixed 1.68-5ubuntu0.1~esm1
	20.04 LTS focal	Fixed 1.61-1ubuntu0.1~esm1
	18.04 LTS bionic	Fixed 1.59-1ubuntu0.1~esm1
	16.04 LTS xenial	Ignored changes too intrusive

Get expanded security coverage with Ubuntu Pro

Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.

Get Ubuntu Pro 30-day free trial

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
bouncycastle	Upstream: efc498c Upstream: fee80dd

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-8108-1
Bouncy Castle vulnerabilities
18 March 2026