Vulnerability CVE-2021-32734

Vulnerability Name:

CVE-2021-32734 (CCN-205339)

Assigned:

2021-07-12

Published:

2021-07-12

Updated:

2022-10-26

Summary:

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, the Nextcloud Text application shipped with Nextcloud Server returned verbatim exception messages to the user. This could result in a full path disclosure on shared files. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. As a workaround, one may disable the Nextcloud Text application in Nextcloud Server app settings.

CVSS v3 Severity:

5.3 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
4.6 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): Low Integrity (I): None Availibility (A): None

4.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
3.8 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): Low Integrity (I): None Availibility (A): None

CVSS v2 Severity:

5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): None Availibility (A): None

4.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:P/I:N/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): Partial Integrity (I): None Availibility (A): None

Vulnerability Type:

CWE-209

Vulnerability Consequences:

Obtain Information

References:

Source: MITRE
Type: CNA
CVE-2021-32734

Source: XF
Type: UNKNOWN
nextcloud-cve202132734-info-disc(205339)

Source: CCN
Type: Nextcloud GIT Repository
File path disclosure of shared files in Nextcloud Text application

Source: CONFIRM
Type: Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6hf5-c2c4-2526

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/nextcloud/text/pull/1695

Source: MISC
Type: Permissions Required
https://hackerone.com/reports/1246721

Source: GENTOO
Type: Third Party Advisory
GLSA-202208-17

Vulnerable Configuration:

Configuration 1:

cpe:/a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* (Version >= 21.0.0 and < 21.0.3)

OR cpe:/a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* (Version >= 20.0.0 and < 20.0.11)

OR cpe:/a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* (Version < 19.0.13)

Configuration CCN 1:

cpe:/a:nextcloud:nextcloud_server:20.0.0:-:*:*:*:*:*:*

OR cpe:/a:nextcloud:nextcloud_server:19.0.0:-:*:*:*:*:*:*

OR cpe:/a:nextcloud:nextcloud_server:21.0.0:-:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:org.opensuse.security:def:93630	P	(Important)	2022-07-21
oval:org.opensuse.security:def:100343	P	(Important)	2021-10-26
oval:org.opensuse.security:def:110978	P	Security update for nextcloud (Important)	2021-07-20
oval:org.opensuse.security:def:11104	P	Security update for nextcloud (Important)	2021-07-20
oval:org.opensuse.security:def:103101	P	Security update for nextcloud (Important)	2021-07-20
oval:org.opensuse.security:def:111486	P	Security update for nextcloud (Important)	2021-07-20
oval:org.opensuse.security:def:109758	P	Security update for nextcloud (Important)	2021-07-20
oval:org.opensuse.security:def:96411	P	Security update for nextcloud (Important)	2021-07-20
oval:org.opensuse.security:def:35508	P	Security update for nextcloud (Important)	2021-07-20

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