Nextcloud Server up to 19.0.12/20.0.10/21.0.2 File Extension DownloadResponse escape output

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Nextcloud Server up to 19.0.12/20.0.10/21.0.2. Affected by this vulnerability is the function DownloadResponse of the component File Extension Handler. Executing a manipulation can lead to escape output. This vulnerability appears as CVE-2021-32679. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Nextcloud Server up to 19.0.12/20.0.10/21.0.2 (Cloud Software). It has been declared as critical. This vulnerability affects the function DownloadResponse of the component File Extension Handler. The manipulation with an unknown input leads to a escape output vulnerability. The CWE definition for the vulnerability is CWE-116. The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was presented 07/12/2021. The advisory is shared for download at github.com. This vulnerability was named CVE-2021-32679. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

Upgrading to version 19.0.13, 20.0.11 or 21.0.3 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
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: Escape output
CWE: CWE-116 / CWE-74 / CWE-707
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Nextcloud Server 19.0.13/20.0.11/21.0.3
Patch: github.com

Timelineinfo

05/12/2021 🔍
07/12/2021 +61 days 🔍
07/12/2021 +0 days 🔍
07/15/2021 +3 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-32679 (🔍)
GCVE (CVE): GCVE-0-2021-32679
GCVE (VulDB): GCVE-100-178288

Entryinfo

Created: 07/12/2021 20:34
Updated: 07/15/2021 14:21
Changes: 07/12/2021 20:34 (40), 07/15/2021 14:20 (6), 07/15/2021 14:21 (1)
Complete: 🔍
Cache ID: 216::103

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