CVE-2013-4558

Mod Dav Svn vulnerability

CVSS

3.5

EPSS

5.9%

EPSS pct

92th

Exploited

No known

The get_parent_resource function in repos.c in mod_dav_svn Apache HTTPD server module in Subversion 1.7.11 through 1.7.13 and 1.8.1 through 1.8.4, when built with assertions enabled and SVNAutoversioning is enabled, allows remote attackers to cause a denial of service (assertion failure and Apache process abort) via a non-canonical URL in a request, as demonstrated using a trailing /.

Affected vendor

Apache

Affected product

Mod Dav Svn

CVSS vector

AV:N/AC:M/Au:S/C:N/I:N/A:P

Weakness type (CWE)

CWE-20 — Improper Input Validation

Published

2013-12-07

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, medium attack complexity, requiring single-factor authentication. Successful exploitation leads to partial impact to availability.

Its EPSS score of 5.9% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 92% of all scored CVEs.

Check your external exposure to CVE-2013-4558

Confirm whether Apache Mod Dav Svn is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2013-4558.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2013-4558

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2013-4558 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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