VDB-167710 · MVID-2021-2023 · GCVE-100-167710

Backdoor.Win32.Kurbadur.a Service Port 21220 dataexchange.dll stack-based overflow

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.
6.0	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Backdoor.Win32.Kurbadur.a and classified as critical. This issue affects some unknown processing in the library dataexchange.dll of the component Service Port 21220. Executing a manipulation can lead to stack-based overflow. It is possible to launch the attack remotely. Furthermore, an exploit is available.

Detailsinfo

A vulnerability has been found in Backdoor.Win32.Kurbadur.a (Remote Access Software) (the affected version is unknown) and classified as critical. This vulnerability affects an unknown code in the library dataexchange.dll of the component Service Port 21220. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was published 01/13/2021 as MVID-2021-2023. The advisory is available at malvuln.com. Technical details and also a public exploit are known.

It is possible to download the exploit at malvuln.com. It is declared as proof-of-concept.

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Productinfo

Type

Remote Access Software

Name

Backdoor.Win32.Kurbadur.a

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

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

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍

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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/13/2021 🔍
01/13/2021 +0 days 🔍
01/13/2021 +0 days 🔍

Sourcesinfo

Advisory: MVID-2021-2023
Status: Confirmed

GCVE (VulDB): GCVE-100-167710
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 01/13/2021 10:56
Changes: 01/13/2021 10:56 (39)
Complete: 🔍
Submitter: malvuln
Cache ID: 216::103

Submitinfo

Accepted

Submit #5580: BACKDOOR.WIN32.KURBADUR.A / Remote Stack Buffer Overflow (by malvuln)