Medium · CVSS 5.9CVE-2024-3296

Rust-openssl: timing based side-channel can lead to a bleichenbacher style attackCVE-2024-3296

Answer in brief

CVE-2024-3296 records a Medium severity (CVSS 5.9) vulnerability in Rust-openssl: timing based side-channel can lead to a bleichenbacher style attack. The current sources do not mark it as known exploited. The current feed maps rust-openssl (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Apr 4, 2024Updated Nov 5, 2026Source checked Nov 5, 2026First seen by HOL Nov 5, 2026Material review Nov 5, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.9
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 5.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps rust-openssl (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
rust-opensslgeneric	>=3.2.0 <*	*

Recommended response

Check inventory. Check lockfiles and deployed manifests for rust-openssl.
Review the reported fix. Source-reported workaround: 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.

Evidence timeline and material changes

Published upstream
Apr 4, 2024
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Nov 5, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Package

Affected range

Fixed version

rust-opensslgeneric

>=3.2.0 <*

Recommended response

Check inventory. Check lockfiles and deployed manifests for rust-openssl.

Review the reported fix. Source-reported workaround: 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.

Sources and claim methodology

Upstream source description

Quoted source text, attributed separately from HOL analysis.