CVE-2025-59339

Audit-record tampering via omitted GPG signing

Published Sep 17, 2025 · Updated Sep 17, 2025

Missing signing in OVHcloud The Bastion before 3.22.00 allows local users with high privileges to tamper with encrypted ttyrec recordings. The osh-encrypt-rsync gpg_encrypt routine supplies the signing key and passphrase but omits GPG's --sign option, so encrypted output lacks a verifiable signature. If the optional signing workflow is configured, a user able to modify recordings and access the public encryption keys can alter audit evidence without easy detection.

CVSS severity4.4
Medium
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing signing in OVHcloud The Bastion before 3.22.00 allows local users with high privileges to tamper with encrypted ttyrec recordings. The osh-encrypt-rsync gpg_encrypt routine supplies the signing key and passphrase but omits GPG's --sign option, so encrypted output lacks a verifiable signature. If the optional signing workflow is configured, a user able to modify recordings and access the public encryption keys can alter audit evidence without easy detection.

The record

CVE
CVE-2025-59339
Published
Sep 17, 2025
Updated
Sep 17, 2025
Vendor
OVHcloud
Product
The Bastion
Classifications
CWE-325, T1565.001
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.22.00

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

OVHcloud · The Bastionversion=< 3.22.00

Published CVSS scores

4.4GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/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)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-325Missing Cryptographic Step
T1565.001Stored Data Manipulation

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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