Vulnerability Name:

CVE-2020-8152 (CCN-193845)

Assigned:2020-10-03
Published:2020-10-03
Updated:2022-09-27
Summary:Insufficient protection of the server-side encryption keys in Nextcloud Server 19.0.1 allowed an attacker to replace the public key to decrypt them later on.
CVSS v3 Severity:4.4 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N)
3.9 Low (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
5.7 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N)
5.0 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): None
CVSS v2 Severity:2.1 Low (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
5.5 Medium (CCN CVSS v2 Vector: AV:L/AC:H/Au:S/C:C/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): High
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-522
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2020-8152

Source: FULLDISC
Type: Exploit, Mailing List, Third Party Advisory
20201225 Re: [FD] CVE-2020-8152 - Elevation of Privilege in Backblaze

Source: XF
Type: UNKNOWN
nextcloud-cve20208152-sec-bypass(193845)

Source: MISC
Type: Exploit, Issue Tracking, Third Party Advisory
https://hackerone.com/reports/743505

Source: CCN
Type: NC-SA-2020-040
Improper confidentiality protection of server-side encryption keys

Source: MISC
Type: Broken Link, Vendor Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2020-040

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2020-8152

Vulnerable Configuration:Configuration 1:
  • cpe:/a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* (Version < 20.0.0)

    • Configuration CCN 1:
  • cpe:/a:nextcloud:nextcloud_server:19.0.1:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    nextcloud nextcloud server *
    nextcloud nextcloud server 19.0.1