Home/CVE/An error in the implementation of an autosubscribe feature in the check_stream_exists route of the Zulip group chat appl
CVE

CVE-2017-0881

An error in the implementation of an autosubscribe feature in the check_stream_exists route of the Zulip group chat appl

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.

MEDIUM · CVSS 4.3 EPSS 0.00206
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  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-863Incorrect Authorization
▤

Affected Products & Versions

1
zulip server< 1.4.3
▣

Scoring & Timeline

4.3
MEDIUM · CVSS v3.0 · support@hackerone.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD28 Mar 2017 · 02:59 AM
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.securityfocus.com/bid/97159Third Party AdvisoryVendor Advisory
https://github.com/zulip/zulip/commit/7ecda1ac8e26d8fb3725e954b2dc4723dda2255fPatchThird Party Advisory
https://groups.google.com/d/msg/zulip-announce/VyawgRuoY34/NTBwnTArGwAJPatchRelease NotesThird Party Advisory
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