Amazon Linux AMI : mod_dav_svn / subversion (ALAS-2016-676)

high Nessus Plugin ID 90269


The remote Amazon Linux AMI host is missing a security update.


It was found that when an SVN server (both svnserve and httpd with the mod_dav_svn module) searched the history of a file or a directory, it would disclose its location in the repository if that file or directory was not readable (for example, if it had been moved).

An integer overflow was discovered allowing remote attackers to execute arbitrary code via an svn:// protocol string, which triggers a heap-based buffer overflow and an out-of-bounds read. (CVE-2015-5259)

It was found that the mod_authz_svn module did not properly restrict anonymous access to Subversion repositories under certain configurations when used with Apache httpd 2.4.x. This could allow a user to anonymously access files in a Subversion repository, which should only be accessible to authenticated users. (CVE-2015-3184)

It was found that the mod_dav_svn module was vulnerable to a remotely triggerable heap-based buffer overflow and out-of-bounds read caused by an integer overflow when parsing skel-encoded request bodies, allowing an attacker with write access to a repository to cause a denial of service attack (on 32-bit or 64-bit servers) or possibly execute arbitrary code (on 32-bit servers only) under the context of the httpd process. (CVE-2015-5343)


Run 'yum update mod_dav_svn' to update your system.

Run 'yum update subversion' to update your system.

See Also

Plugin Details

Severity: High

ID: 90269

File Name: ala_ALAS-2016-676.nasl

Version: 2.4

Type: local

Agent: unix

Published: 4/1/2016

Updated: 4/18/2018

Supported Sensors: Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent

Risk Information


Risk Factor: Medium

Score: 4.7


Risk Factor: High

Base Score: 9

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:C


Risk Factor: High

Base Score: 8.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:mod24_dav_svn, p-cpe:/a:amazon:linux:mod_dav_svn, p-cpe:/a:amazon:linux:mod_dav_svn-debuginfo, p-cpe:/a:amazon:linux:subversion, p-cpe:/a:amazon:linux:subversion-debuginfo, p-cpe:/a:amazon:linux:subversion-devel, p-cpe:/a:amazon:linux:subversion-javahl, p-cpe:/a:amazon:linux:subversion-libs, p-cpe:/a:amazon:linux:subversion-perl, p-cpe:/a:amazon:linux:subversion-python26, p-cpe:/a:amazon:linux:subversion-python27, p-cpe:/a:amazon:linux:subversion-ruby, p-cpe:/a:amazon:linux:subversion-tools, cpe:/o:amazon:linux

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Patch Publication Date: 3/29/2016

Reference Information

CVE: CVE-2015-3184, CVE-2015-3187, CVE-2015-5259, CVE-2015-5343

ALAS: 2016-676