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Vulnerability Details :

CVE-2021-37334

Summary
Assigner-mitre
Assigner Org ID-8254265b-2729-46b6-b9e3-3dfca2d5bfca
Published At-25 Aug, 2021 | 21:16
Updated At-04 Aug, 2024 | 01:16
Rejected At-
Credits

Umbraco Forms version 4.0.0 up to and including 8.7.5 and below are vulnerable to a security flaw that could lead to a remote code execution attack and/or arbitrary file deletion. A vulnerability occurs because validation of the file extension is performed after the file has been stored in a temporary directory. By default, files are stored within the application directory structure at %BASEDIR%/APP_DATA/TEMP/FileUploads/. Whilst access to this directory is restricted by the root web.config file, it is possible to override this restriction by uploading another specially crafted web.config file to the temporary directory. It is possible to exploit this flaw to upload a malicious script file to execute arbitrary code and system commands on the server.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:mitre
Assigner Org ID:8254265b-2729-46b6-b9e3-3dfca2d5bfca
Published At:25 Aug, 2021 | 21:16
Updated At:04 Aug, 2024 | 01:16
Rejected At:
▼CVE Numbering Authority (CNA)

Umbraco Forms version 4.0.0 up to and including 8.7.5 and below are vulnerable to a security flaw that could lead to a remote code execution attack and/or arbitrary file deletion. A vulnerability occurs because validation of the file extension is performed after the file has been stored in a temporary directory. By default, files are stored within the application directory structure at %BASEDIR%/APP_DATA/TEMP/FileUploads/. Whilst access to this directory is restricted by the root web.config file, it is possible to override this restriction by uploading another specially crafted web.config file to the temporary directory. It is possible to exploit this flaw to upload a malicious script file to execute arbitrary code and system commands on the server.

Affected Products
Vendor
n/a
Product
n/a
Versions
Affected
  • n/a
Problem Types
TypeCWE IDDescription
textN/An/a
Type: text
CWE ID: N/A
Description: n/a
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://umbraco.com/blog/security-advisory-security-patches-for-umbraco-forms-ready-on-july-20th-2021-at-7-am-utc/
x_refsource_MISC
https://umbraco.com/blog/security-advisory-20th-of-july-2021-patch-is-now-available/
x_refsource_MISC
Hyperlink: https://umbraco.com/blog/security-advisory-security-patches-for-umbraco-forms-ready-on-july-20th-2021-at-7-am-utc/
Resource:
x_refsource_MISC
Hyperlink: https://umbraco.com/blog/security-advisory-20th-of-july-2021-patch-is-now-available/
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://umbraco.com/blog/security-advisory-security-patches-for-umbraco-forms-ready-on-july-20th-2021-at-7-am-utc/
x_refsource_MISC
x_transferred
https://umbraco.com/blog/security-advisory-20th-of-july-2021-patch-is-now-available/
x_refsource_MISC
x_transferred
Hyperlink: https://umbraco.com/blog/security-advisory-security-patches-for-umbraco-forms-ready-on-july-20th-2021-at-7-am-utc/
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://umbraco.com/blog/security-advisory-20th-of-july-2021-patch-is-now-available/
Resource:
x_refsource_MISC
x_transferred
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:cve@mitre.org
Published At:25 Aug, 2021 | 22:15
Updated At:28 Nov, 2021 | 23:10

Umbraco Forms version 4.0.0 up to and including 8.7.5 and below are vulnerable to a security flaw that could lead to a remote code execution attack and/or arbitrary file deletion. A vulnerability occurs because validation of the file extension is performed after the file has been stored in a temporary directory. By default, files are stored within the application directory structure at %BASEDIR%/APP_DATA/TEMP/FileUploads/. Whilst access to this directory is restricted by the root web.config file, it is possible to override this restriction by uploading another specially crafted web.config file to the temporary directory. It is possible to exploit this flaw to upload a malicious script file to execute arbitrary code and system commands on the server.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.19.8CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary2.09.3HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C
Type: Primary
Version: 3.1
Base score: 9.8
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Type: Primary
Version: 2.0
Base score: 9.3
Base severity: HIGH
Vector:
AV:N/AC:M/Au:N/C:C/I:C/A:C
CPE Matches
Umbraco A/S (Umbraco)
umbraco
>>forms>>Versions from 4.0.0(inclusive) to 4.4.9(exclusive)
cpe:2.3:a:umbraco:forms:*:*:*:*:*:*:*:*
Umbraco A/S (Umbraco)
umbraco
>>forms>>Versions from 6.0.0(inclusive) to 6.0.10(exclusive)
cpe:2.3:a:umbraco:forms:*:*:*:*:*:*:*:*
Umbraco A/S (Umbraco)
umbraco
>>forms>>Versions from 7.0.0(inclusive) to 7.0.7(exclusive)
cpe:2.3:a:umbraco:forms:*:*:*:*:*:*:*:*
Umbraco A/S (Umbraco)
umbraco
>>forms>>Versions from 7.1.0(inclusive) to 7.1.4(exclusive)
cpe:2.3:a:umbraco:forms:*:*:*:*:*:*:*:*
Umbraco A/S (Umbraco)
umbraco
>>forms>>Versions from 7.2.0(inclusive) to 7.2.1(exclusive)
cpe:2.3:a:umbraco:forms:*:*:*:*:*:*:*:*
Umbraco A/S (Umbraco)
umbraco
>>forms>>Versions from 7.3.0(inclusive) to 7.3.2(exclusive)
cpe:2.3:a:umbraco:forms:*:*:*:*:*:*:*:*
Umbraco A/S (Umbraco)
umbraco
>>forms>>Versions from 7.4.0(inclusive) to 7.4.3(exclusive)
cpe:2.3:a:umbraco:forms:*:*:*:*:*:*:*:*
Umbraco A/S (Umbraco)
umbraco
>>forms>>Versions from 7.5.0(inclusive) to 7.5.4(exclusive)
cpe:2.3:a:umbraco:forms:*:*:*:*:*:*:*:*
Umbraco A/S (Umbraco)
umbraco
>>forms>>Versions from 8.0.0(inclusive) to 8.0.2(exclusive)
cpe:2.3:a:umbraco:forms:*:*:*:*:*:*:*:*
Umbraco A/S (Umbraco)
umbraco
>>forms>>Versions from 8.1.0(inclusive) to 8.1.6(exclusive)
cpe:2.3:a:umbraco:forms:*:*:*:*:*:*:*:*
Umbraco A/S (Umbraco)
umbraco
>>forms>>Versions from 8.2.0(inclusive) to 8.2.3(exclusive)
cpe:2.3:a:umbraco:forms:*:*:*:*:*:*:*:*
Umbraco A/S (Umbraco)
umbraco
>>forms>>Versions from 8.3.0(inclusive) to 8.3.4(exclusive)
cpe:2.3:a:umbraco:forms:*:*:*:*:*:*:*:*
Umbraco A/S (Umbraco)
umbraco
>>forms>>Versions from 8.4.0(inclusive) to 8.4.4(exclusive)
cpe:2.3:a:umbraco:forms:*:*:*:*:*:*:*:*
Umbraco A/S (Umbraco)
umbraco
>>forms>>Versions from 8.5.0(inclusive) to 8.5.7(exclusive)
cpe:2.3:a:umbraco:forms:*:*:*:*:*:*:*:*
Umbraco A/S (Umbraco)
umbraco
>>forms>>Versions from 8.6.0(inclusive) to 8.6.2(exclusive)
cpe:2.3:a:umbraco:forms:*:*:*:*:*:*:*:*
Umbraco A/S (Umbraco)
umbraco
>>forms>>Versions from 8.7.0(inclusive) to 8.7.6(exclusive)
cpe:2.3:a:umbraco:forms:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
NVD-CWE-noinfoPrimarynvd@nist.gov
CWE ID: NVD-CWE-noinfo
Type: Primary
Source: nvd@nist.gov
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://umbraco.com/blog/security-advisory-20th-of-july-2021-patch-is-now-available/cve@mitre.org
Patch
Vendor Advisory
https://umbraco.com/blog/security-advisory-security-patches-for-umbraco-forms-ready-on-july-20th-2021-at-7-am-utc/cve@mitre.org
Vendor Advisory
Hyperlink: https://umbraco.com/blog/security-advisory-20th-of-july-2021-patch-is-now-available/
Source: cve@mitre.org
Resource:
Patch
Vendor Advisory
Hyperlink: https://umbraco.com/blog/security-advisory-security-patches-for-umbraco-forms-ready-on-july-20th-2021-at-7-am-utc/
Source: cve@mitre.org
Resource:
Vendor Advisory

Change History

0
Information is not available yet

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