rsync up to 3.1.2 rsyncd options.c parse_arguments --protect-args 7pk security

HistoryDiffrelatejsonxmlCTI

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.2	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in rsync up to 3.1.2 and classified as critical. Affected by this vulnerability is the function parse_arguments of the file options.c of the component rsyncd. The manipulation of the argument --protect-args as part of Argument leads to 7pk security. This vulnerability is uniquely identified as CVE-2018-5764. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in rsync up to 3.1.2 (File Transfer Software) and classified as critical. This issue affects the function parse_arguments of the file options.c of the component rsyncd. The manipulation of the argument --protect-args as part of a Argument leads to a 7pk security vulnerability. Using CWE to declare the problem leads to CWE-254. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The parse_arguments function in options.c in rsyncd in rsync before 3.1.3 does not prevent multiple --protect-args uses, which allows remote attackers to bypass an argument-sanitization protection mechanism.

The bug was discovered 11/20/2017. The weakness was disclosed 01/17/2018 (Website). It is possible to read the advisory at download.samba.org. The identification of this vulnerability is CVE-2018-5764 since 01/17/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1211 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 58 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 106261 (SUSE SLES11 Security Update : rsync (SUSE-SU-2018:0172-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176753 (Debian Security Update for rsync (DLA 1725-1)).

Upgrading to version 3.1.3 eliminates this vulnerability. A possible mitigation has been published 5 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (106261), SecurityFocus (BID 102803†) and SecurityTracker (ID 1040276†). The entries VDB-108441, VDB-108517, VDB-108518 and VDB-108519 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

File Transfer Software

Name

rsync

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: 7pk security
CWE: CWE-254
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 106261
Nessus Name: SUSE SLES11 Security Update : rsync (SUSE-SU-2018:0172-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 60833
OpenVAS Name: Debian Lts Announce DLA 1247-1 ([SECURITY] [DLA 1247-1] rsync security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: rsync 3.1.3
Patch: 7706303828fcde524222babb2833864a4bd09e07

Timelineinfo

11/20/2017 🔍
01/17/2018 +58 days 🔍
01/17/2018 +0 days 🔍
01/17/2018 +0 days 🔍
01/17/2018 +0 days 🔍
01/18/2018 +1 days 🔍
01/22/2018 +4 days 🔍
01/23/2018 +1 days 🔍
01/25/2018 +2 days 🔍
02/02/2023 +1834 days 🔍

Sourcesinfo

Advisory: USN-3543-1
Researcher: Jeriko One
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-5764 (🔍)
GCVE (CVE): GCVE-0-2018-5764
GCVE (VulDB): GCVE-100-111947
SecurityFocus: 102803 - rsync 'options.c' Security Bypass Vulnerability
SecurityTracker: 1040276

See also: 🔍

Entryinfo

Created: 01/18/2018 08:07
Updated: 02/02/2023 07:48
Changes: 01/18/2018 08:07 (84), 02/07/2020 08:28 (5), 01/30/2021 09:22 (2), 02/02/2023 07:48 (5)
Complete: 🔍
Cache ID: 216::103

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