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CVE-2021-28544

Publication date 12 April 2021

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

4.3 · Medium

Score breakdown

Apache Subversion SVN authz protected copyfrom paths regression Subversion servers reveal 'copyfrom' paths that should be hidden according to configured path-based authorization (authz) rules. When a node has been copied from a protected location, users with access to the copy can see the 'copyfrom' path of the original. This also reveals the fact that the node was copied. Only the 'copyfrom' path is revealed; not its contents. Both httpd and svnserve servers are vulnerable.

From the Ubuntu Security Team

Evgeny Kotkov discovered that subversion servers did not properly follow path-based authorization rules in certain cases. An attacker could potentially use this issue to retrieve information about private paths.

Status

Package Ubuntu Release Status
subversion 22.04 LTS jammy
Fixed 1.14.1-3ubuntu0.22.04.1
21.10 impish
Fixed 1.14.1-3ubuntu0.1
20.04 LTS focal
Fixed 1.13.0-3ubuntu0.1
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected

Severity score breakdown

Parameter Value
Base score 4.3 · Medium
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality Low
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

Related Ubuntu Security Notices (USN)

    • USN-5372-1
    • Subversion vulnerabilities
    • 12 April 2022
    • USN-5450-1
    • Subversion vulnerabilities
    • 27 May 2022

Other references