CVE-2019-25102 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-2019-25102?
CVE-2019-25102 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, which was classified as problematic, was found in simple-markdown 0.6.0. Affected is an unknown function of the file simple-markdown.js. The manipulation with the input <<<<<<<<<<:/:/:/:/:/:/:/:/:/:/ leads to inefficient regular expression complexity. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 0.6.1 is able to address this issue. The patch is identified as 015a719bf5cdc561feea05500ecb3274ef609cd2. It is recommended to upgrade the affected component. VDB-220638 is the identifier assigned to this vulnerability.
Weakness: CWE-1333
Which versions are affected by CVE-2019-25102?
2 open source packages ship an affected version, including simple-markdown. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
simple-markdown npm | All versions | 0.6.1 |
simple-markdown npm | All versions | 0.6.1 |
Products include Khanacademy Simple-Markdown.
How do I fix CVE-2019-25102?
Upgrade simple-markdown to 0.6.1 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-2019-25102 being exploited?
There is no known exploitation of CVE-2019-25102 in the wild and no public exploit code.
Other vulnerabilities in simple-markdown
Sources
Also known as GHSA-j533-2g8v-pmpg.