Vulnerability Details : CVE-2022-31168
Zulip is an open source team chat tool. Due to an incorrect authorization check in Zulip Server 5.4 and earlier, a member of an organization could craft an API call that grants organization administrator privileges to one of their bots. The vulnerability is fixed in Zulip Server 5.5. Members who don’t own any bots, and lack permission to create them, can’t exploit the vulnerability. As a workaround for the vulnerability, an organization administrator can restrict the `Who can create bots` permission to administrators only, and change the ownership of existing bots.
Vulnerability category: BypassGain privilege
Products affected by CVE-2022-31168
- cpe:2.3:a:zulip:zulip:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2022-31168
0.19%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 55 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2022-31168
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
8.8
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST | |
|
5.4
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
2.8
|
2.5
|
GitHub, Inc. |
CWE ids for CVE-2022-31168
-
The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.Assigned by: security-advisories@github.com (Primary)
-
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. This allows attackers to bypass intended access restrictions.Assigned by: security-advisories@github.com (Primary)
References for CVE-2022-31168
-
https://github.com/zulip/zulip/security/advisories/GHSA-c3cp-ggg5-9xw5
Insufficient authorization check for changing bot roles in Zulip Server · Advisory · zulip/zulip · GitHubThird Party Advisory
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https://github.com/zulip/zulip/commit/751b2a03e565e9eb02ffe923b7c24ac73d604034
CVE-2022-31168: Fix authorization check for changing bot roles. · zulip/zulip@751b2a0 · GitHubPatch;Third Party Advisory
-
https://github.com/zulip/zulip/releases/tag/5.5
Release Zulip Server 5.5 · zulip/zulip · GitHubRelease Notes;Third Party Advisory
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