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Apache MINA SSHD information disclosure vulnerability

Moderate severity GitHub Reviewed Published Jul 10, 2023 to the GitHub Advisory Database • Updated Dec 7, 2023

Package

maven org.apache.sshd:sshd-common (Maven)

Affected versions

>= 2.1.0, < 2.9.3

Patched versions

2.9.3
maven org.apache.sshd:sshd-core (Maven)
>= 1.0.0, < 2.1.0
2.1.0
maven org.apache.sshd:sshd-sftp (Maven)
>= 1.0.0, < 2.9.3
2.9.3

Description

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Software Foundation Apache MINA.

In SFTP servers implemented using Apache MINA SSHD that use a RootedFileSystem, logged users may be able to discover "exists/does not exist" information about items outside the rooted tree via paths including parent navigation ("..") beyond the root, or involving symlinks.

This issue affects Apache MINA: from 1.0 before 2.9.3 Users are recommended to upgrade to 2.9.3

Until version 2.1.0, some of the code affected by this vulnerability appeared in org.apache.sshd:sshd-core. Version 2.1.0 contains a commit where the code was moved to the package org.apache.sshd:sshd-common, which did not exist until version 2.1.0.

References

Published by the National Vulnerability Database Jul 10, 2023
Published to the GitHub Advisory Database Jul 10, 2023
Reviewed Jul 10, 2023
Last updated Dec 7, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

EPSS score

0.048%
(19th percentile)

Weaknesses

CVE ID

CVE-2023-35887

GHSA ID

GHSA-mjmq-gwgm-5qhm

Source code

Credits

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