Vulnerability Name:

CVE-2021-22879 (CCN-200061)

Assigned:2021-02-24
Published:2021-02-24
Updated:2022-10-24
Summary:Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing validation of URLs, allowing a malicious server to execute remote commands. User interaction is needed for exploitation.
CVSS v3 Severity:8.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
7.7 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
4.7 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:L)
4.1 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): High
User Interaction (UI): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): Low
CVSS v2 Severity:6.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
3.4 Low (CCN CVSS v2 Vector: AV:L/AC:H/Au:M/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): High
Athentication (Au): Multiple_Instances
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
Vulnerability Type:CWE-74
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2021-22879

Source: XF
Type: UNKNOWN
nextcloud-cve202122879-code-exec(200061)

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/nextcloud/desktop/pull/2906

Source: MISC
Type: Exploit, Third Party Advisory
https://hackerone.com/reports/1078002

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-1ffffa0251

Source: CCN
Type: NC-SA-2021-008
Missing URL validation allowed RCE for the server on the Desktop client

Source: MISC
Type: Vendor Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2021-008

Source: GENTOO
Type: Third Party Advisory
GLSA-202105-37

Vulnerable Configuration:Configuration 1:
  • cpe:/a:nextcloud:desktop:*:*:*:*:*:*:*:* (Version < 3.1.3)

  • Configuration 2:
  • cpe:/o:fedoraproject:fedora:33:*:*:*:*:*:*:*

  • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:112041
    P
    caja-extension-nextcloud-3.3.4-1.1 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:105596
    P
    caja-extension-nextcloud-3.3.4-1.1 on GA media (Moderate)
    2021-10-01
    oval:org.opensuse.security:def:111328
    P
    Security update for nextcloud-desktop (Important)
    2021-04-19
    BACK
    nextcloud desktop *
    fedoraproject fedora 33