CVE-2023-25000

Vault Vulnerable to Cache-Timing Attacks During Seal and Unseal Operations

MEDIUM

4.7

CVSS Score

Published: March 30, 2023 at 12:17 AM UTC

Updated: June 17, 2026 at 05:40 AM UTC

1 product affected across 1 vendorVault

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Severity

MEDIUM4.7

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

HashiCorp Vault's implementation of Shamir's secret sharing used precomputed table lookups, and was vulnerable to cache-timing attacks. An attacker with access to, and the ability to observe a large number of unseal operations on the host through a side channel may reduce the search space of a brute force effort to recover the Shamir shares. Fixed in Vault 1.13.1, 1.12.5, and 1.11.9.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vault · Hashicorp

95%

v < 1.11.0v < 1.11.91.11.0 ≤ v < 1.11.91.12.0 ≤ v < 1.12.51.13.0 ≤ v < 1.13.11.11.0 1.12.0 1.13.0

Affected range stops below 1.11.0, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.11.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.12.5, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.13.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://discuss.hashicorp.com/t/hcsec-2023-10-vault-vulnerable-to-cache-timing-attacks-during-seal-and-unseal-operations/52078

References (2)

Issue TrackingPatchVendor Advisory

Source: [email protected]

https://discuss.hashicorp.com/t/hcsec-2023-10-vault-vulnerable-to-cache-timing-attacks-during-seal-and-unseal-operations/52078

Source: [email protected]

https://security.netapp.com/advisory/ntap-20230526-0008/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.7MEDIUM[email protected]

Attack Vector: LOCAL
Complexity: HIGH
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: NONE
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-208CWE-203

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