CVE-2024-2467Public exploitNetwork attack vector

Plaintext recovery via PKCS#1 timing oracle

Published Apr 25, 2024 · Updated Feb 25, 2026

Timing side channel in Crypt::OpenSSL::RSA before 0.35 allows remote attackers to recover plaintext through PKCS#1 v1.5 decryption. The module exposes processing-time differences while its decryption path validates attacker-chosen RSA ciphertexts, creating a Bleichenbacher-style padding oracle. Exploitation requires an application to expose the legacy decryption mode and permit many precisely timed trial messages; signatures are not affected.

CVSS severity5.9
Medium
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Timing side channel in Crypt::OpenSSL::RSA before 0.35 allows remote attackers to recover plaintext through PKCS#1 v1.5 decryption. The module exposes processing-time differences while its decryption path validates attacker-chosen RSA ciphertexts, creating a Bleichenbacher-style padding oracle. Exploitation requires an application to expose the legacy decryption mode and permit many precisely timed trial messages; signatures are not affected.

The record

CVE
CVE-2024-2467
Published
Apr 25, 2024
Updated
Feb 25, 2026
Vendor
Red Hat
Product
Red Hat Enterprise Linux 8
Classifications
CWE-208
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 25, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Red Hat · Red Hat Enterprise Linux 8Affected versions are unavailable in this record.
Red Hat · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.
Red Hat · OpenSSLversion=pkg:rpm/redhat/perl-crypt-openssl-rsa@distro=redhat-enterprise-linux-6.0; version=pkg:rpm/redhat/perl-crypt-openssl-rsa@distro=redhat-enterprise-linux-7.0; version=pkg:rpm/redhat/perl-crypt-openssl-rsa@distro=redhat-enterprise-linux-8.0; version=pkg:rpm/redhat/perl-crypt-openssl-rsa@distro=redhat-enterprise-linux-9.0
Ian Robertson · Crypt::OpenSSL::RSAAffected versions are unavailable in this record.

Published CVSS scores

5.9Red HatCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-208Observable Timing Discrepancy

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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