ksmbd up to 3.4.2 Server cleartext transmission

CVSS Meta Temp Score
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CTI Interest Score
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3.6$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in ksmbd up to 3.4.2. This issue affects some unknown processing of the component Server. Such manipulation leads to cleartext transmission. This vulnerability is traded as CVE-2021-45100. The attack may be launched remotely. There is no exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in ksmbd up to 3.4.2. It has been rated as problematic. Affected by this issue is an unknown part of the component Server. The manipulation with an unknown input leads to a cleartext transmission vulnerability. Using CWE to declare the problem leads to CWE-319. The product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors. Impacted is confidentiality.

The weakness was shared 12/16/2021 as 550. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2021-45100 since 12/16/2021. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1040.

The vulnerability scanner Nessus provides a plugin with the ID 250097 (Linux Distros Unpatched Vulnerability : CVE-2021-45100), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (250097). 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: 3.7
VulDB Meta Temp Score: 3.6

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Cleartext transmission
CWE: CWE-319 / CWE-310
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 250097
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2021-45100

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

12/16/2021 🔍
12/16/2021 +0 days 🔍
12/16/2021 +0 days 🔍
08/17/2025 +1340 days 🔍

Sourcesinfo

Advisory: 550
Status: Confirmed

CVE: CVE-2021-45100 (🔍)
GCVE (CVE): GCVE-0-2021-45100
GCVE (VulDB): GCVE-100-188324

Entryinfo

Created: 12/16/2021 07:31
Updated: 08/17/2025 12:59
Changes: 12/16/2021 07:31 (39), 12/18/2021 10:03 (1), 08/17/2025 11:55 (16), 08/17/2025 12:59 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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