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Amazon Linux AMI : subversion / mod_dav_svn (ALAS-2017-883)

critical Nessus Plugin ID 102871

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Synopsis

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

Description

Command injection through clients via malicious svn+ssh URLs

A shell command injection flaw related to the handling of 'svn+ssh' URLs has been discovered in Subversion. An attacker could use this flaw to execute shell commands with the privileges of the user running the Subversion client, for example when performing a 'checkout' or 'update' action on a malicious repository, or a legitimate repository containing a malicious commit. (CVE-2017-9800)

Solution

Run 'yum update subversion' to update your system.

Run 'yum update mod_dav_svn' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2017-883.html

Plugin Details

Severity: Critical

ID: 102871

File Name: ala_ALAS-2017-883.nasl

Version: 3.5

Type: local

Agent: unix

Published: 9/1/2017

Updated: 11/25/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2017-9800

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/31/2017

Reference Information

CVE: CVE-2017-9800

ALAS: 2017-883