Klapp App Authorization Credentials information disclosure

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.
4.1$0-$5k0.00

A vulnerability has been found in Klapp App (version unknown) and classified as problematic. This vulnerability affects an unknown function of the component Authorization. The manipulation with an unknown input leads to a information disclosure vulnerability (Credentials). The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality.

The bug was discovered 08/18/2020. The weakness was disclosed 09/07/2020 by Sven Fassbender with modzero AG as Knapp daneben ist auch vorbei as confirmed advisory (Website). The advisory is available at modzero.com. The public release has been coordinated in cooperation with the vendor. This vulnerability was named CVE-2020-36532. The attack can be initiated remotely. The successful exploitation requires a single authentication. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 6 days. During that time the estimated underground price was around $0-$5k.

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

The entry VDB-160763 is pretty similar.

Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Name: Credentials
Class: Information disclosure / Credentials
CWE: CWE-200 / 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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍

Timelineinfo

08/18/2020 🔍
08/19/2020 +1 days 🔍
08/21/2020 +2 days 🔍
08/24/2020 +3 days 🔍
09/07/2020 +14 days 🔍
09/07/2020 +0 days 🔍
06/03/2022 +634 days 🔍

Sourcesinfo

Advisory: Knapp daneben ist auch vorbei
Researcher: Sven Fassbender
Organization: modzero AG
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2020-36532 (🔍)
See also: 🔍

Entryinfo

Created: 09/07/2020 01:09 PM
Updated: 06/03/2022 08:36 PM
Changes: 09/07/2020 01:09 PM (50), 09/07/2020 02:03 PM (2), 06/03/2022 08:36 PM (2)
Complete: 🔍
Cache ID: 18:E2C:40

Discussion

 klapp (+0)
2 years ago
Upon being alerted to the vulnerability on August 18, 2020, Klapp swiftly contacted modzero AG to discuss necessary actions. Klapp confirmed and remedied the authorization code vulnerability by August 24, 2020. This issue, classified as non-public zero-day exploit for at 6 days, affected the authorization component isolated to members of a class, leading to a potential information disclosure. We emphasize that the security and privacy of our users are our top priorities. We have taken immediate action to mitigate this vulnerability and have enhanced our systems to prevent similar issues in the future.

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