WebDAV API Authentication Bypass in ownCloud by ownCloud
CVE-2023-49105

9.8CRITICAL

Key Information:

Vendor

Owncloud

Status
Owncloud
Vendor
CVE Published:
21 November 2023

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 86%

What is CVE-2023-49105?

A significant authentication bypass vulnerability exists in ownCloud versions prior to 10.13.1, which allows attackers to access, modify, or delete any user's files if they know the victim's username and the victim has not configured a signing-key. This vulnerability arises because the system improperly accepts pre-signed URLs even when no signing-key is in place for the file owner. The issue affects all versions starting from 10.6.0 and poses a serious risk to user data security.

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

owncloud-exploits
Created by ambionics

References

https://owncloud.org/security
https://owncloud.com/security-advisories/webdav-api-authe...

EPSS Score

86% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.