Vulnerability Details : CVE-2017-0881
An error in the implementation of an autosubscribe feature in the check_stream_exists route of the Zulip group chat application server before 1.4.3 allowed an authenticated user to subscribe to a private stream that should have required an invitation from an existing member to join. The issue affects all previously released versions of the Zulip server.
Vulnerability category: Information leak
Products affected by CVE-2017-0881
- cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2017-0881
0.06%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 26 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2017-0881
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.0
|
MEDIUM | AV:N/AC:L/Au:S/C:P/I:N/A:N |
8.0
|
2.9
|
NIST | |
|
4.3
|
MEDIUM | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
2.8
|
1.4
|
NIST |
CWE ids for CVE-2017-0881
-
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.Assigned by: support@hackerone.com (Secondary)
-
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-0881
-
http://www.securityfocus.com/bid/97159
Zulip Server CVE-2017-0881 Security Bypass VulnerabilityThird Party Advisory;Vendor Advisory
-
https://github.com/zulip/zulip/commit/7ecda1ac8e26d8fb3725e954b2dc4723dda2255f
streams: Fix autosubscribe security bug (CVE-2017-0881). · zulip/zulip@7ecda1a · GitHubPatch;Third Party Advisory
-
https://groups.google.com/d/msg/zulip-announce/VyawgRuoY34/NTBwnTArGwAJ
Zulip Server 1.4.3 release (CVE-2017-0881) - Google GroepenPatch;Release Notes;Third Party Advisory
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