CVE-2023-31606 RedCloth Regular Expression Denial of Service issue
Attackers can cause a Denial of Service in applications using the redcloth gem by supplying crafted payloads to the sanitize_html function.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-31606?
CVE-2023-31606 is a high-severity denial of service vulnerability in n/a, published on 6 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A Regular Expression Denial of Service (ReDoS) issue was discovered in the sanitize_html function of redcloth gem v4.0.0. This vulnerability allows attackers to cause a Denial of Service (DoS) via supplying a crafted payload.
Weakness: CWE-1333
Which versions are affected by CVE-2023-31606?
2 open source packages ship an affected version, including RedCloth. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
RedCloth RubyGems | All versions | 4.3.3 |
RedCloth RubyGems | All versions | 4.3.3 |
Products include Promptworks Redcloth.
How do I fix CVE-2023-31606?
Upgrade RedCloth to 4.3.3 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-2023-31606 being exploited?
There is no known exploitation of CVE-2023-31606 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as DEBIAN-CVE-2023-31606, DLA-3480-1, GHSA-qcm3-vfq5-wfr2, MGASA-2023-0291, UBUNTU-CVE-2023-31606, USN-6358-1.