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

high Nessus Plugin ID 90269

Synopsis

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

Description

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).
(CVE-2015-3187)

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)

Solution

Run 'yum update mod_dav_svn' to update your system.

Run 'yum update subversion' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2016-676.html

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

VPR

Risk Factor: Medium

Score: 4.7

CVSS v2

Risk Factor: High

Base Score: 9

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

CVSS v3

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