CVE-2023-32342Network attack vector

Information disclosure via RSA decryption timing oracle

Published May 30, 2023 · Updated Jan 9, 2025

Timing side channel in IBM GSKit allows remote attackers to obtain sensitive information through repeated RSA decryption trials. The RSA decryption implementation exposes input-dependent processing time while handling a large volume of attacker-chosen trial ciphertexts. Exploitation requires network access to a service using an affected TLS_RSA_* CipherSpec and enough requests to distinguish timing differences.

CVSS severity7.5
High
EPSS probability0.92%
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 IBM GSKit allows remote attackers to obtain sensitive information through repeated RSA decryption trials. The RSA decryption implementation exposes input-dependent processing time while handling a large volume of attacker-chosen trial ciphertexts. Exploitation requires network access to a service using an affected TLS_RSA_* CipherSpec and enough requests to distinguish timing differences.

The record

CVE
CVE-2023-32342
Published
May 30, 2023
Updated
Jan 9, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 9, 2025Record 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 buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5IBM CorporationCVSS:3.1/AV:N/AC:L/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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-203Observable Discrepancy

Public exploit references

No public exploit references are available in this record.

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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