CVE-2011-1783

The mod_dav_svn module for the Apache HTTP Server, as distributed in Apache Subversion 1.5.x and 1.6.x before 1.6.17, when the SVNPathAuthz short_circuit option is enabled, allows remote attackers to cause a denial of service (infinite loop and memory consumption) in opportunistic circumstances by requesting data.

Published: 2011-06-06 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-1783 is rated Moderate Risk (45.4/100): CVSS Medium severity, with high exploitation likelihood (EPSS 6.74%, 93th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-1783

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 11.09% 6.74% -4.35%
2 2025-12-28 10.01% 11.09% +1.08%
3 2025-12-27 — 10.01% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-1783

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2011-1783

OS Trackers for CVE-2011-1783

vendor priority summary link
debian not yet assigned CVE-2011-1783 not yet assigned priority: Debian including 1 source packages (subversion), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2011-1783
gentoo low CVE-2011-1783: 1 GLSA(s) (201309-11), 1 atom(s) (dev-vcs/subversion); latest impact low. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-1783
redhat medium — https://access.redhat.com/security/cve/CVE-2011-1783
ubuntu medium CVE-2011-1783 medium priority: Ubuntu including 1 source packages (subversion), 5 status rows across 5 suites (hardy, lucid, maverick, natty, upstream): released 4, ignored 1. https://ubuntu.com/security/CVE-2011-1783

Affected software / configurations for CVE-2011-1783

Vendor Product Version Raw CPE
apache subversion >= 1.5.0, <= 1.5.8 cpe:2.3:a:apache:subversion:*:*:*:*:*:*:*:*
apache subversion >= 1.6.0, < 1.6.17 cpe:2.3:a:apache:subversion:*:*:*:*:*:*:*:*
canonical ubuntu_linux 10.04 cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:-:*:*:*
canonical ubuntu_linux 10.10 cpe:2.3:o:canonical:ubuntu_linux:10.10:*:*:*:*:*:*:*
canonical ubuntu_linux 11.04 cpe:2.3:o:canonical:ubuntu_linux:11.04:*:*:*:*:*:*:*
debian debian_linux 5.0 cpe:2.3:o:debian:debian_linux:5.0:*:*:*:*:*:*:*
debian debian_linux 6.0 cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*
fedoraproject fedora 14 cpe:2.3:o:fedoraproject:fedora:14:*:*:*:*:*:*:*
fedoraproject fedora 15 cpe:2.3:o:fedoraproject:fedora:15:*:*:*:*:*:*:*
apple mac_os_x < 10.7.3 cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*

References for CVE-2011-1783

URL Tags
http://lists.apple.com/archives/security-announce/2012/Feb/msg00000.html Mailing List Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062211.html Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061913.html Third Party Advisory
http://secunia.com/advisories/44633 Third Party Advisory
http://secunia.com/advisories/44681 Third Party Advisory
http://secunia.com/advisories/44849 Third Party Advisory
http://secunia.com/advisories/44888 Third Party Advisory
http://secunia.com/advisories/45162 Third Party Advisory
http://subversion.apache.org/security/CVE-2011-1783-advisory.txt Vendor Advisory
http://support.apple.com/kb/HT5130 Third Party Advisory
http://svn.apache.org/repos/asf/subversion/tags/1.6.17/CHANGES Release Notes Vendor Advisory
http://www.debian.org/security/2011/dsa-2251 Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2011:106 Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2011-0862.html Third Party Advisory
http://www.securityfocus.com/bid/48091 Third Party Advisory VDB Entry
http://www.securitytracker.com/id?1025618 Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-1144-1 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=709112 Issue Tracking Third Party Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18889 Third Party Advisory
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