VDB-171792 · MVID-2021-0129 · GCVE-100-171792

Backdoor.Win32.Zombam.l HTTP GET Request httpserver.exe buffer 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.
6.7	$0-$5k	0.00

Summaryinfo

A vulnerability described as critical has been identified in Backdoor.Win32.Zombam.l. Impacted is an unknown function of the file httpserver.exe of the component HTTP GET Request Handler. The manipulation results in buffer overflow. The attack can be launched remotely. Moreover, an exploit is present. Applying restrictive firewalling is recommended.

Detailsinfo

A vulnerability classified as critical has been found in Backdoor.Win32.Zombam.l (Remote Access Software) (unknown version). Affected is an unknown code block of the file httpserver.exe of the component HTTP GET Request Handler. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was disclosed 03/26/2021 as MVID-2021-0129. The advisory is shared for download at malvuln.com. Technical details and a public exploit are known.

The exploit is shared for download at malvuln.com. It is declared as proof-of-concept.

It is possible to mitigate the weakness by firewalling .

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Remote Access Software

Name

Backdoor.Win32.Zombam.l

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.3
VulDB Temp Score: 6.7
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: Buffer overflow
CWE: CWE-120 / 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: Firewall
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/26/2021 🔍
03/26/2021 +0 days 🔍
03/26/2021 +0 days 🔍

Sourcesinfo

Advisory: MVID-2021-0129
Status: Not defined

GCVE (VulDB): GCVE-100-171792
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/26/2021 09:51
Changes: 03/26/2021 09:51 (40)
Complete: 🔍
Submitter: malvuln
Cache ID: 216::103

Submitinfo

Accepted

Submit #9888: BACKDOOR.WIN32.ZOMBAM.L / Remote Stack Buffer Overflow (by malvuln)