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CVE-2023-25000

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

5.0 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
High
Privileges needed
High
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

0.21%Up 0.2 points since Mar 30, 2023
90%50%10%1%

What each source reports

CVE List Score used 5.0

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

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.

Record
CVE-2023-25000
CVSS 3.1
5.0 MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:N/A:N
Weakness
CWE-208
Updated
2026-11-02
EUVDEUVD-2023-1119 5.0

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.

Record
EUVD-2023-1119
CVSS 3.1
5.0 MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:N/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-vq4h-9ghm-qmrr 4.7

HashiCorp Vault's implementation of Shamir's secret sharing vulnerable to cache-timing attacks

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.

Record
GHSA-vq4h-9ghm-qmrr
CVSS 3.1
4.7 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-203, CWE-208
Updated
2026-11-02
NVD 5.0

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.

Record
CVE-2023-25000
CVSS 3.1
5.0 MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:N/A:N
CVSS 3.1
4.7 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-208, CWE-203
Updated
2026-11-02
OSV 5.0

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

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.

Record
CVE-2023-25000
CVSS 3.1
5.0 MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:N/A:N
Weakness
CWE-208
Updated
2026-11-02
OSVGHSA-vq4h-9ghm-qmrr 4.7

HashiCorp Vault's implementation of Shamir's secret sharing vulnerable to cache-timing attacks

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.

Record
GHSA-vq4h-9ghm-qmrr
CVSS 3.1
4.7 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-203, CWE-208
Updated
2026-11-02
OSVBIT-vault-2023-25000 No score

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

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.

Record
BIT-vault-2023-25000
Updated
2026-11-02
OSVGO-2023-1709 No score

Cache-timing attacks in Shamir's secret sharing in github.com/hashicorp/vault

HashiCorp Vault's implementation of Shamir's secret sharing uses precomputed table lookups, and is 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.

Record
GO-2023-1709
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
github.com/hashicorp/vault
Go
before 1.11.9
1.11.9
github.com/hashicorp/vault
Go
1.12.0 up to 1.12.5
1.12.5
github.com/hashicorp/vault
Go
1.13.0 up to 1.13.1
1.13.1
vault
Bitnami
before 1.11.9, 1.12.0 up to 1.12.5, 1.13.0 up to 1.13.1
1.11.91.12.51.13.1
github.com/hashicorp/vault
Go
before 1.11.9, 1.12.0 up to 1.12.5, 1.13.0 up to 1.13.1
1.11.91.12.51.13.1

History

History
RecordedChangedSources
aliases, publishedEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-25000 is a medium vulnerability (CVSS 5.0) in Hashicorp Vault, published March 30, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.21%, the 11th percentile. Fixed in github.com/hashicorp/vault 1.11.9.

References

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