CVE-2021-43791

Published on: Not Yet Published

Last Modified on: 12/03/2021 06:09:00 PM UTC

CVE-2021-43791 - advisory for GHSA-wj76-pcqr-mf9f

Source: Mitre Source: Nist Print: PDF PDF
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Certain versions of Zulip from Zulip contain the following vulnerability:

Zulip is an open source group chat application that combines real-time chat with threaded conversations. In affected versions expiration dates on the confirmation objects associated with email invitations were not enforced properly in the new account registration flow. A confirmation link takes a user to the check_prereg_key_and_redirect endpoint, before getting redirected to POST to /accounts/register/. The problem was that validation was happening in the check_prereg_key_and_redirect part and not in /accounts/register/ - meaning that one could submit an expired confirmation key and be able to register. The issue is fixed in Zulip 4.8. There are no known workarounds and users are advised to upgrade as soon as possible.

  • CVE-2021-43791 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as MEDIUM severity.
  • Affected Vendor/Software: URL Logo zulip - zulip version < 4.8

CVSS3 Score: 5.3 - MEDIUM

Attack
Vector
Attack
Complexity
Privileges
Required
User
Interaction
NETWORK LOW NONE NONE
Scope Confidentiality
Impact
Integrity
Impact
Availability
Impact
UNCHANGED NONE LOW NONE

CVSS2 Score: 5 - MEDIUM

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

CVE References

Description Tags Link
CVE-2021-43791: Validate confirmation keys in /accounts/register/ cod… · zulip/[email protected] · GitHub github.com
text/html
URL Logo MISC github.com/zulip/zulip/commit/a014ef75a3a0ed7f24ebb157632ba58751e732c6
Ineffective expiration validation for invitation links · Advisory · zulip/zulip · GitHub github.com
text/html
URL Logo CONFIRM github.com/zulip/zulip/security/advisories/GHSA-wj76-pcqr-mf9f

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
ApplicationZulipZulipAllAllAllAll
  • cpe:2.3:a:zulip:zulip:*:*:*:*:*:*:*:*:

Social Mentions

Source Title Posted (UTC)
Twitter Icon @CVEreport CVE-2021-43791 : Zulip is an open source group chat application that combines real-time chat with threaded conversa… twitter.com/i/web/status/1… 2021-12-02 00:17:13
© CVE.report 2022 Twitter Nitter Twitter Viewer |

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