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CVE-2025-59339— The Bastion ttyrec files are not signed after encryption by the osh-encrypt-rsync script

Quick assessment

Affected
ovh the-bastion
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

The Bastion是OVHcloud开源的一个身份验证系统。 The Bastion存在安全漏洞，该漏洞源于脚本未能正确签名文件，可能导致数据完整性问题。

CVSS 4.4 · Medium EPSS 0.10% · P1

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2025-59339

Vulnerability Information
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Vulnerability Title
The Bastion ttyrec files are not signed after encryption by the osh-encrypt-rsync script
Source: CVE Program / CVE List V5
Vulnerability Description
The Bastion provides authentication, authorization, traceability and auditability for SSH accesses. Session-recording ttyrec files, may be handled by the provided osh-encrypt-rsync script that is a helper to rotate, encrypt, sign, copy, and optionally move them to a remote storage periodically, if configured to. When running, the script properly rotates and encrypts the files using the provided GPG key(s), but silently fails to sign them, even if asked to.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
缺少必要的密码学步骤
Source: CVE Program / CVE List V5
Vulnerability Title
The Bastion 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
The Bastion是OVHcloud开源的一个身份验证系统。 The Bastion存在安全漏洞，该漏洞源于脚本未能正确签名文件，可能导致数据完整性问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ovh the-bastion < 3.22.00 -

II. Public POCs for CVE-2025-59339

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III. Intelligence Information for CVE-2025-59339

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Vendor Advisories for CVE-2025-59339 (1)

IV. Related Vulnerabilities

Same product: the-bastion
Same vendor: ovh
Same weakness: CWE-325

V. Comments for CVE-2025-59339

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