---
id: CVE-2024-3296
title: >-
  Rust-openssl: timing based side-channel can lead to a bleichenbacher style
  attack
summary: >-
  A timing-based side-channel flaw exists in the rust-openssl package, which
  could be sufficient to recover a plaintext across a network in a
  Bleichenbacher-style attack. To achieve successful decryption, an attacker
  would have to be able …
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-208
vendor: Red Hat
product: rust-openssl
affected:
  - rust-openssl >= 3.2.0 < *
  - '389-ds:1.4/389-ds-base'
  - python3.12-cryptography
  - 389-ds-base
  - keylime-agent-rust
  - python3.12-cryptography
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-04-04T15:28:08.090330Z'
published: '2024-04-04'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T12:18:03.706Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2024-3296'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2024-3296'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2269723'
    label: RHBZ#2269723
tags:
  - cve.org
epss: 0.00415
epssPercentile: 0.36058
ingestedAt: '2026-11-05T21:36:00.835Z'
---

## Overview

A timing-based side-channel flaw exists in the rust-openssl package, which could be sufficient to recover a plaintext across a network in a Bleichenbacher-style attack. To achieve successful decryption, an attacker would have to be able to send a large number of trial messages for decryption. The vulnerability affects the legacy PKCS#1v1.5 RSA encryption padding mode.

## Affected

- `rust-openssl >= 3.2.0 < *`
- `389-ds:1.4/389-ds-base`
- `python3.12-cryptography`
- `389-ds-base`
- `keylime-agent-rust`
- `python3.12-cryptography`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

### Workarounds

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.