EncFS up to 1.7.5 Configuration File .encfs6.xml blockMACBytes information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in EncFS up to 1.7.5. The affected element is an unknown function of the file .encfs6.xml of the component Configuration File. Such manipulation of the argument blockMACBytes with the input 0 leads to information disclosure. This vulnerability is traded as CVE-2014-3462. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in EncFS up to 1.7.5. Affected by this issue is an unknown functionality of the file .encfs6.xml of the component Configuration File. The manipulation of the argument blockMACBytes with the input value 0 leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The ".encfs6.xml" configuration file in encfs before 1.7.5 allows remote attackers to access sensitive data by setting "blockMACBytes" to 0 and adding 8 to "blockMACRandBytes".

The bug was discovered 05/14/2014. The weakness was shared 08/07/2017 (oss-sec). The advisory is shared for download at openwall.com. This vulnerability is handled as CVE-2014-3462 since 05/14/2014. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability was handled as a non-public zero-day exploit for at least 595 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:.encfs6.xml it is possible to find vulnerable targets with Google Hacking. The vulnerability scanner Nessus provides a plugin with the ID 87709 (GLSA-201512-09 : encfs: Multiple vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169660 (OpenSuSE Security Update for encfs (openSUSE-SU-2017:0158-1)).

Upgrading to version 1.7.6 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 (87709). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.7

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 87709
Nessus Name: GLSA-201512-09 : encfs: Multiple vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 18627
OpenVAS Name: Gentoo Linux Local Check: https://security.gentoo.org/glsa/201512-09
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: EncFS 1.7.6

Timelineinfo

05/14/2014 🔍
05/14/2014 +0 days 🔍
12/30/2015 +595 days 🔍
01/04/2016 +5 days 🔍
08/07/2017 +581 days 🔍
08/07/2017 +0 days 🔍
08/08/2017 +1 days 🔍
12/17/2024 +2688 days 🔍

Sourcesinfo

Advisory: openwall.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-3462 (🔍)
GCVE (CVE): GCVE-0-2014-3462
GCVE (VulDB): GCVE-100-104924

Entryinfo

Created: 08/08/2017 10:33
Updated: 12/17/2024 04:23
Changes: 08/08/2017 10:33 (73), 11/04/2019 11:05 (2), 12/17/2024 04:23 (21)
Complete: 🔍
Cache ID: 216:9DC:103

Once again VulDB remains the best source for vulnerability data.

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