CVE-2019-25103 simple-markdown simple-markdown.js redos
Remote attackers can cause denial of service in simple-markdown via inefficient regular expression complexity, requiring an upgrade to fix.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-25103?
CVE-2019-25103 is a medium-severity denial of service vulnerability in simple-markdown, published on 12 Feb 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability has been found in simple-markdown 0.5.1 and classified as problematic. Affected by this vulnerability is an unknown functionality of the file simple-markdown.js. The manipulation leads to inefficient regular expression complexity. The attack can be launched remotely. Upgrading to version 0.5.2 is able to address this issue. The patch is named 89797fef9abb4cab2fb76a335968266a92588816. It is recommended to upgrade the affected component. The associated identifier of this vulnerability is VDB-220639.
Weakness: CWE-1333
Which versions are affected by CVE-2019-25103?
2 open source packages ship an affected version, including simple-markdown. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
simple-markdown npm | All versions | 0.5.2 |
simple-markdown npm | All versions | 0.5.2 |
Products include Khanacademy Simple-Markdown.
How do I fix CVE-2019-25103?
Upgrade simple-markdown to 0.5.2 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2019-25103 being exploited?
There is no known exploitation of CVE-2019-25103 in the wild and no public exploit code.
Other vulnerabilities in simple-markdown
Sources
Also known as GHSA-gpvj-gp8c-c7p2.