CVE-2023-45140

Group-based JIT MFA bypass on scp and sftp in The Bastion

Description

The Bastion provides authentication, authorization, traceability and auditability for SSH accesses. SCP and SFTP plugins don't honor group-based JIT MFA. Establishing a SCP/SFTP connection through The Bastion via a group access where MFA is enforced does not ask for additional factor. This abnormal behavior only applies to per-group-based JIT MFA. Other MFA setup types, such as Immediate MFA, JIT MFA on a per-plugin basis and JIT MFA on a per-account basis are not affected. This issue has been patched in version 3.14.15.

Category

4.8
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.23%
Vendor Advisory github.com
Affected: ovh the-bastion
Published at:
Updated at:

References

Link Tags
https://github.com/ovh/the-bastion/security/advisories/GHSA-pr4q-w883-pf5x mitigation vendor advisory
https://github.com/ovh/the-bastion/releases/tag/v3.14.15 patch

Frequently Asked Questions

What is the severity of CVE-2023-45140?
CVE-2023-45140 has been scored as a medium severity vulnerability.
How to fix CVE-2023-45140?
To fix CVE-2023-45140, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-45140 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-45140 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-45140?
CVE-2023-45140 affects ovh the-bastion.
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