CVE-2020-17525

Remote unauthenticated denial-of-service in Subversion mod_authz_svn

HIGH
7.5
CVSS Score
Published: March 17, 2021 at 09:20 AM UTC
Updated: June 17, 2026 at 02:59 AM UTC
2 products affected across 2 vendorsDebian LinuxSubversion

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Severity
HIGH7.5
Exploit prediction
EPSS 40%

Description

Subversion's mod_authz_svn module will crash if the server is using in-repository authz rules with the AuthzSVNReposRelativeAccessFile option and a client sends a request for a non-existing repository URL. This can lead to disruption for users of the service. This issue was fixed in mod_dav_svn+mod_authz_svn servers 1.14.1 and mod_dav_svn+mod_authz_svn servers 1.10.7

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

1.11.0 ≤ v < 1.14.11.9.0 ≤ v < 1.10.7mod_authz_svn ≤ v < 1.14.1mod_authz_svn
Affected range stops below 1.10.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.14.1, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in mod_authz_svn 1.10.7 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

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