CVE-2013-6890
UnknownEPSS 8.90%
Last modified
CVE-2013-6890 is a vulnerability of currently unknown severity. denyhosts 2.6 uses an incorrect regular expression when analyzing authentication logs, which allows remote attackers to cause a denial of service (incorrect block of IP addresses) via crafted login names.. EPSS estimates a 8.90% chance of exploitation in the next 30 days.
Description
denyhosts 2.6 uses an incorrect regular expression when analyzing authentication logs, which allows remote attackers to cause a denial of service (incorrect block of IP addresses) via crafted login names.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Debian | Debian Linux | 6.0 |
| Debian | Debian Linux | 7.0 |
| Debian | Debian Linux | 7.1 |
| Fedoraproject | Fedora | All versions |
| Phil Schwartz | Denyhosts | 2.6 |
References
- http://secunia.com/advisories/56239Vendor Advisory
- http://secunia.com/advisories/56239Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2013-6890?
denyhosts 2.6 uses an incorrect regular expression when analyzing authentication logs, which allows remote attackers to cause a denial of service (incorrect block of IP addresses) via crafted login names.
How severe is CVE-2013-6890?
Severity scoring for CVE-2013-6890 is pending analysis. The EPSS model estimates a 8.90% probability of exploitation in the next 30 days.
How do I fix CVE-2013-6890?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2013-6890?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST