Authorization bypass through user-controlled key in Nextcloud Mail



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-31131
CWE-ID CWE-639
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Nextcloud Mail
Web applications / Modules and components for CMS

Vendor Nextcloud

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Authorization bypass through user-controlled key

EUVDB-ID: #VU65374

Risk: Medium

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-31131

CWE-ID: CWE-639 - Authorization Bypass Through User-Controlled Key

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to missing ownership check when updating or deleting mail attachments. A remote user can cause the attachment is unavailable for the given message in the outbox.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Nextcloud Mail: 1.0.0 - 1.12.1

CPE2.3 External links

https://github.com/nextcloud/mail/pull/6600/commits/6dd2527be8d4f6788b449c8a8f5577628b990605
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xhv7-5mhv-299j
https://github.com/nextcloud/mail/pull/6600


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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