SB2019112224 - Improper Authentication in Zulip Server
Published: November 22, 2019 Updated: July 17, 2020
Security Bulletin ID
SB2019112224
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper Authentication (CVE-ID: CVE-2019-18933)
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
In Zulip Server versions from 1.7.0 to before 2.0.7, a bug in the new user signup process meant that users who registered their account using social authentication (e.g., GitHub or Google SSO) in an organization that also allows password authentication could have their personal API key stolen by an unprivileged attacker, allowing nearly full access to the user's account.
Remediation
Install update from vendor's website.