4.3
MEDIUM
CVE-2017-0894
Nextcloud Server Calendar Token Disclosure Vulnerability
Description

Nextcloud Server before 11.0.3 is vulnerable to disclosure of valid share tokens for public calendars due to a logical error. Thus granting an attacker potentially access to publicly shared calendars without knowing the share token.

INFO

Published Date :

May 8, 2017, 8:29 p.m.

Last Modified :

Sept. 27, 2022, 4:04 p.m.

Remotely Exploitable :

Yes !

Impact Score :

1.4

Exploitability Score :

2.8
Affected Products

The following products are affected by CVE-2017-0894 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Nextcloud nextcloud_server
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2017-0894.

URL Resource
https://hackerone.com/reports/218876 Third Party Advisory
https://nextcloud.com/security/advisory/?id=nc-sa-2017-011 Broken Link Patch Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2017-0894 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2017-0894 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Modified Analysis by [email protected]

    Sep. 27, 2022

    Action Type Old Value New Value
    Removed CVSS V3 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
    Changed Reference Type https://hackerone.com/reports/218876 Permissions Required https://hackerone.com/reports/218876 Third Party Advisory
    Changed Reference Type https://nextcloud.com/security/advisory/?id=nc-sa-2017-011 Patch, Vendor Advisory https://nextcloud.com/security/advisory/?id=nc-sa-2017-011 Broken Link, Patch, Vendor Advisory
    Removed CWE NIST CWE-200
    Added CWE NIST CWE-863
    Changed CPE Configuration OR *cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:*:*:*:* versions up to (including) 11.0.2 OR *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* versions up to (excluding) 11.0.3
  • CVE Modified by [email protected]

    Oct. 09, 2019

    Action Type Old Value New Value
    Added CWE HackerOne CWE-285
  • Initial Analysis by [email protected]

    May. 17, 2017

    Action Type Old Value New Value
    Added CVSS V2 (AV:N/AC:M/Au:N/C:P/I:N/A:N)
    Added CVSS V3 AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
    Changed Reference Type https://nextcloud.com/security/advisory/?id=nc-sa-2017-011 No Types Assigned https://nextcloud.com/security/advisory/?id=nc-sa-2017-011 Patch, Vendor Advisory
    Changed Reference Type https://hackerone.com/reports/218876 No Types Assigned https://hackerone.com/reports/218876 Permissions Required
    Added CWE CWE-200
    Added CPE Configuration OR *cpe:2.3:a:nextcloud:nextcloud:11.0.2:*:*:*:*:*:*:* (and previous)
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2017-0894 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2017-0894 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.08 }} 0.00%

score

0.31068

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability