Vulnerability Monitor

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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.

Published

2017-03-28T02:59:01.463

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 4.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:S/C:P/I:N/A:N

Access Vector: NETWORK
Access Complexity: LOW
Authentication: SINGLE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

8.0

Impact Score

2.9

Weaknesses

Type: Secondary
CWE-200
Type: Primary
CWE-863

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	zulip	zulip_server	< 1.4.3	Yes

References

http://www.securityfocus.com/bid/97159 Third Party Advisory, Vendor Advisory ([email protected])
https://github.com/zulip/zulip/commit/7ecda1ac8e26d8fb3725e954b2dc4723dda2255f Patch, Third Party Advisory ([email protected])
https://groups.google.com/d/msg/zulip-announce/VyawgRuoY34/NTBwnTArGwAJ Patch, Release Notes, Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/97159 Third Party Advisory, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/zulip/zulip/commit/7ecda1ac8e26d8fb3725e954b2dc4723dda2255f Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://groups.google.com/d/msg/zulip-announce/VyawgRuoY34/NTBwnTArGwAJ Patch, Release Notes, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)