Evernote 5.5.0 on Android Authentication .pref.xml improper authentication

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.
6.7$0-$5k0.00

A vulnerability has been found in Evernote 5.5.0 on Android (Android App Software) and classified as critical. This vulnerability affects an unknown code block of the file .pref.xml of the component Authentication Handler. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect confidentiality, and integrity. The advisory summarizes:

The ADB backup functionality requires an Android device running the Ice-Cream Sandwich version of Android (4.x) or above.

The bug was discovered 05/01/2013. The weakness was released 12/07/2013 by Chris John Riley as confirmed blog post (Blog). The advisory is available at blog.c22.cc. The public release was coordinated with the vendor. This vulnerability was named CVE-2013-5116 since 08/13/2013. Local access is required to approach this attack. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known.

After immediately, there has been an exploit disclosed. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 208 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:.pref.xml it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 5.5.1 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at OSVDB (100937†). Entry connected to this vulnerability is available at VDB-11505.

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.7
VulDB Temp Score: 6.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.1
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: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exploit Delay Time: 🔍

Upgrade: Evernote 5.5.1

Timelineinfo

05/01/2013 🔍
08/13/2013 +104 days 🔍
08/13/2013 +0 days 🔍
11/25/2013 +104 days 🔍
12/07/2013 +12 days 🔍
12/07/2013 +0 days 🔍
12/16/2013 +9 days 🔍
06/04/2021 +2727 days 🔍

Sourcesinfo

Advisory: blog.c22.cc
Researcher: Chris John Riley
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2013-5116 (🔍)
X-Force: 89734
OSVDB: 100937

scip Labs: https://www.scip.ch/en/?labs.20130704
See also: 🔍

Entryinfo

Created: 12/16/2013 10:54 AM
Updated: 06/04/2021 10:59 AM
Changes: 12/16/2013 10:54 AM (56), 03/23/2019 11:26 PM (3), 06/04/2021 10:53 AM (3), 06/04/2021 10:59 AM (18)
Complete: 🔍
Committer: olku
Cache ID: 98:631:40

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