librsync up to 0.9 Block Match cryptographic issue

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.
5.4	$0-$5k	0.00

Summaryinfo

A vulnerability was found in librsync up to 0.9. It has been declared as critical. Affected by this issue is some unknown functionality of the component Block Match Handler. The manipulation results in cryptographic issue. This vulnerability is reported as CVE-2014-8242. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in librsync up to 0.9 (File Transfer Software). It has been classified as critical. Affected is some unknown processing of the component Block Match Handler. The manipulation with an unknown input leads to a cryptographic issue vulnerability. CWE is classifying the issue as CWE-310. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

librsync before 1.0.0 uses a truncated MD4 checksum to match blocks, which makes it easier for remote attackers to modify transmitted data via a birthday attack.

The weakness was disclosed 10/26/2015 (Website). The advisory is available at github.com. This vulnerability is traded as CVE-2014-8242 since 10/12/2014. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1600 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 81716 (Fedora 22 : csync2-1.34-15.fc22 / duplicity-0.6.25-3.fc22 / librsync-1.0.0-1.fc22 / etc (2015-2923)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168417 (SUSE Enterprise Linux Security update for rsync (SUSE-SU-2016:0176-1)).

Upgrading to version 1.0.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (81716). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• File Transfer Software

Name

• librsync

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9

Website

• Product: https://github.com/librsync/librsync/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Cryptographic issue
CWE: CWE-310
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: 81716
Nessus Name: Fedora 22 : csync2-1.34-15.fc22 / duplicity-0.6.25-3.fc22 / librsync-1.0.0-1.fc22 / etc (2015-2923)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for rdiff-backup FEDORA-2015-3497
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: librsync 1.0.0

Timelineinfo

10/12/2014 🔍
10/26/2015 +379 days 🔍
10/26/2015 +0 days 🔍
10/27/2015 +1 days 🔍
06/25/2022 +2433 days 🔍

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2014-8242 (🔍)
GCVE (CVE): GCVE-0-2014-8242
GCVE (VulDB): GCVE-100-78882

Entryinfo

Created: 10/27/2015 08:46
Updated: 06/25/2022 06:04
Changes: 10/27/2015 08:46 (54), 02/19/2018 09:14 (6), 06/25/2022 05:52 (3), 06/25/2022 06:04 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

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