Is CVE-2015-8854 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2015-8854 being exploited in the wild.

How severe is CVE-2015-8854?

High severity, with a CVSS score of 7.5, published 23 January 2017.

Which products and versions are affected?

marked (npm) SEMVER:introduced=0,fixed=0.3.4.

Is there a fix for CVE-2015-8854?

Yes. marked (npm): upgrade to 0.3.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2015-8854 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2015-8854?

Check whether you run marked (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2015-8854: marked project marked ReDoS in em inline rule

CVE-2015-8854 · Severity: high · CVSS 7.5 · Published 2017-01-23

The 'marked' library, a popular Markdown parser for Node.js, is vulnerable to a denial-of-service attack. An attacker can provide specially crafted Markdown text that causes the server to consume excessive CPU resources, potentially leading to a complete service outage. This can disrupt business operations by making applications that process user-supplied Markdown unresponsive.

Technologies: marked (npm). Vendors: npm.

Quick answers

Is CVE-2015-8854 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2015-8854 being exploited in the wild.
How severe is CVE-2015-8854?: High severity, with a CVSS score of 7.5, published 23 January 2017.
Which products and versions are affected?: marked (npm) SEMVER:introduced=0,fixed=0.3.4.
Is there a fix for CVE-2015-8854?: Yes. marked (npm): upgrade to 0.3.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2015-8854 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2015-8854?: Check whether you run marked (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

marked (npm): upgrade to 0.3.4 or later
```
npm install marked@0.3.4
```

Technical details

A Regular Expression Denial of Service (ReDoS) vulnerability exists in the 'marked' library before version 0.3.4. The vulnerability is caused by catastrophic backtracking in the regular expression used for the 'em' (emphasis) inline rule. A remote, unauthenticated attacker can exploit this by submitting a specially crafted Markdown string that triggers inefficient processing, leading to high CPU utilization and a denial of service (DoS) condition. The issue was addressed in version 0.3.4, though some later advisories suggest further related fixes in version 0.3.9.

Affected products

marked_project marked < 0.3.4

Identifiers

CVE-2015-8854
GHSA-hjcp-j389-59ff

Timeline

2015-08-01: disclosed: Vulnerability identified in Node Security Advisory 23
2017-01-23: advisory: NVD published CVE-2015-8854
2020-05-31: patched: Fedora updates released for affected versions

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.