Vulnerability Name:

CVE-2021-32705 (CCN-205219)

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, there was a lack of ratelimiting on the public DAV endpoint. This may have allowed an attacker to enumerate potentially valid share tokens or credentials. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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): High
Integrity (I): None
Availibility (A): None
7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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): High
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
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-799
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2021-32705

Source: XF
Type: UNKNOWN
nextcloud-cve202132705-info-disc(205219)

Source: CCN
Type: Nextcloud GIT Repository
Lack of ratelimit on public DAV endpoint

Source: CONFIRM
Type: Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-fjv7-283f-5m54

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/nextcloud/server/pull/27610

Source: MISC
Type: Permissions Required
https://hackerone.com/reports/1192159

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-6f327296fe

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-9b421b78af

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 2:
  • cpe:/o:fedoraproject:fedora:33:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:34:*:*:*:*:*:*:*

    • 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 IDClassTitleLast 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
    BACK
    nextcloud nextcloud server *
    nextcloud nextcloud server *
    nextcloud nextcloud server *
    fedoraproject fedora 33
    fedoraproject fedora 34
    nextcloud nextcloud server 20.0.0
    nextcloud nextcloud server 19.0.0 -
    nextcloud nextcloud server 21.0.0 -