Authorization bypass through user-controlled key in Nextcloud Deck
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-8297 |
| CWE-ID | N/A |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Deck Mobile applications / Apps for mobile phones |
| Vendor | Nextcloud |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Authorization bypass through user-controlled key
EUVDB-ID: #VU51051
Risk: Low
CVSSv3.1: 4.5 [CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-8297
CWE-ID: N/A
Exploit availability: No
DescriptionThe vulnerability allows a remote user to compromise the target system.
The vulnerability exists due to insecure direct object reference (IDOR) issue. A remote administrator with a duplicate user identifier can use deck data of a previous deleted user.
MitigationInstall updates from vendor's website.
Vulnerable software versionsDeck: 0.1.0 - 1.0.1
External linkshttp://github.com/nextcloud/deck/pull/1976
http://hackerone.com/reports/882258
http://nextcloud.com/security/advisory/?id=NC-SA-2021-007
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to perform certain actions on the device.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
