CVE-2021-28544

moderate-risk

Published 2022-04-12

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.

Do I need to act?

0.36% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 4.3/10 Medium

NETWORK / LOW complexity

Affected Products (6)

Subversion

Debian Linux

Fedora

Macos

Affected Vendors

Debian Apache Apple Fedoraproject

References (12)

Mailing List http://seclists.org/fulldisclosure/2022/Jul/18

Mailing List https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

Exploit https://subversion.apache.org/security/CVE-2021-28544-advisory.txt

Third Party Advisory https://support.apple.com/kb/HT213345

Third Party Advisory https://www.debian.org/security/2022/dsa-5119

Mailing List http://seclists.org/fulldisclosure/2022/Jul/18

Mailing List https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

Exploit https://subversion.apache.org/security/CVE-2021-28544-advisory.txt

Third Party Advisory https://support.apple.com/kb/HT213345

Third Party Advisory https://www.debian.org/security/2022/dsa-5119

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moderate-risk

Severity 18/34 · Moderate

Exploitability 1/34 · Minimal

Exposure 13/34 · Low