rsync up to 3.1.2/3.1.3-dev Access Restriction receiver.c read_ndx_and_attrs Filename access control

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

A vulnerability was found in rsync up to 3.1.2/3.1.3-dev (File Transfer Software). It has been rated as critical. Affected by this issue is the function read_ndx_and_attrs of the file receiver.c of the component Access Restriction. The manipulation as part of a Filename leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The daemon in rsync 3.1.2, and 3.1.3-development before 2017-11-03, does not check for fnamecmp filenames in the daemon_filter_list data structure (in the recv_files function in receiver.c) and also does not apply the sanitize_paths protection mechanism to pathnames found in "xname follows" strings (in the read_ndx_and_attrs function in rsync.c), which allows remote attackers to bypass intended access restrictions.

The bug was discovered 11/17/2017. The weakness was presented 12/06/2017 (Website). The advisory is available at security.cucumberlinux.com. This vulnerability is handled as CVE-2017-17434 since 12/05/2017. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 105406 (FreeBSD : rsync -- multiple vulnerabilities (72fff788-e561-11e7-8097-0800271d4b9c)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196996 (Ubuntu Security Notification for Rsync Vulnerabilities (USN-3506-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (105406). See 109150 and 110257 for similar entries.

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 105406
Nessus Name: FreeBSD : rsync -- multiple vulnerabilities (72fff788-e561-11e7-8097-0800271d4b9c)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 65795
OpenVAS Name: Debian Security Advisory DSA 4068-1 (rsync - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: 5509597decdbd7b91994210f700329d8a35e70a1

Timelineinfo

11/03/2017 🔍
11/17/2017 +14 days 🔍
12/05/2017 +18 days 🔍
12/05/2017 +0 days 🔍
12/06/2017 +1 days 🔍
12/06/2017 +0 days 🔍
12/21/2017 +15 days 🔍
01/17/2023 +1853 days 🔍

Sourcesinfo

Advisory: DLA 1218-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-17434 (🔍)
OVAL: 🔍
See also: 🔍

Entryinfo

Created: 12/06/2017 16:43
Updated: 01/17/2023 08:36
Changes: 12/06/2017 16:43 (75), 12/12/2019 10:28 (2), 01/17/2023 08:36 (6)
Complete: 🔍
Cache ID: 3:725:103

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