Vulnerability Description
The Markdown parser in Zulip server before 2.0.5 used a regular expression vulnerable to exponential backtracking. A user who is logged into the server could send a crafted message causing the server to spend an effectively arbitrary amount of CPU time and stall the processing of future messages.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Zulip | Zulip Server | < 2.0.5 |
Related Weaknesses (CWE)
References
- https://blog.zulip.org/2019/09/11/zulip-server-2-0-5-security-release/Vendor Advisory
- https://github.com/zulip/zulip/commit/5797f013b3be450c146a4141514bda525f2f1b51PatchThird Party Advisory
- https://blog.zulip.org/2019/09/11/zulip-server-2-0-5-security-release/Vendor Advisory
- https://github.com/zulip/zulip/commit/5797f013b3be450c146a4141514bda525f2f1b51PatchThird Party Advisory
FAQ
What is CVE-2019-16215?
CVE-2019-16215 is a vulnerability with a CVSS score of 6.5 (MEDIUM). The Markdown parser in Zulip server before 2.0.5 used a regular expression vulnerable to exponential backtracking. A user who is logged into the server could send a crafted message causing the server ...
How severe is CVE-2019-16215?
CVE-2019-16215 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-16215?
Check the references section above for vendor advisories and patch information. Affected products include: Zulip Zulip Server.