CVE-2019-16215
Zulip Server Regular Expression Denial of Service (DoS)
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.
INFO
Published Date :
Sept. 18, 2019, 12:15 p.m.
Last Modified :
Feb. 8, 2024, 8:28 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2019-16215.
| URL | Resource |
|---|---|
| https://blog.zulip.org/2019/09/11/zulip-server-2-0-5-security-release/ | Vendor Advisory |
| https://github.com/zulip/zulip/commit/5797f013b3be450c146a4141514bda525f2f1b51 | Patch Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2019-16215 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2019-16215 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Reanalysis by [email protected]
Feb. 08, 2024
Action Type Old Value New Value Removed CWE NIST CWE-400 Added CWE NIST CWE-1333 -
Initial Analysis by [email protected]
Sep. 18, 2019
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://blog.zulip.org/2019/09/11/zulip-server-2-0-5-security-release/ No Types Assigned https://blog.zulip.org/2019/09/11/zulip-server-2-0-5-security-release/ Vendor Advisory Changed Reference Type https://github.com/zulip/zulip/commit/5797f013b3be450c146a4141514bda525f2f1b51 No Types Assigned https://github.com/zulip/zulip/commit/5797f013b3be450c146a4141514bda525f2f1b51 Patch, Third Party Advisory Added CWE CWE-400 Added CPE Configuration OR *cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:* versions up to (excluding) 2.0.5
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2019-16215 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2019-16215
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.08 }} 0.00%
score
0.33067
percentile