CVE-2013-0238

NONECVSS 0.0Elevated
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 10%CVSS: —Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

The try_parse_v4_netmask function in hostmask.c in IRCD-Hybrid before 8.0.6 does not properly validate masks, which allows remote attackers to cause a denial of service (crash) via a mask that causes a negative number to be parsed.

CVSS v3
—
EG Score
0.0(none)
EPSS
95.0%
KEV
Not listed

Published

February 13, 2013

Last Modified

April 29, 2026

References (24)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 33× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 02:19 UTCEPSS rescore
  2. 2026-07-06 02:19 UTCEPSS rescore
  3. 2026-07-05 09:59 UTCOSV refresh
  4. 2026-07-05 02:26 UTCEPSS rescore
  5. 2026-07-04 06:27 UTCEPSS rescore
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  7. 2026-06-30 23:19 UTCEPSS rescore
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  15. 2026-06-23 21:30 UTCEPSS rescore
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  18. 2026-06-21 14:53 UTCEPSS rescore
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  20. 2026-06-19 19:22 UTCEPSS rescore
  21. 2026-06-18 17:49 UTCEPSS rescore
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  23. 2026-06-17 17:49 UTCEPSS rescore
  24. 2026-06-17 17:49 UTCEPSS rescore
  25. 2026-06-16 21:05 UTCOSV refresh
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  1. 2026-06-16 17:49 UTCEPSS rescore
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  3. 2026-06-15 17:44 UTCEPSS rescore
  4. 2026-06-13 22:57 UTCEPSS rescore
  5. 2026-06-12 23:08 UTCEPSS rescore
  6. 2026-06-11 13:56 UTCEPSS rescore
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  9. 2026-06-06 13:45 UTCEPSS rescore
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  17. 2026-05-31 22:28 UTCEPSS rescore
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  19. 2026-05-31 00:14 UTCEPSS rescore
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  21. 2026-05-29 13:41 UTCEPSS rescore
  22. 2026-05-29 13:41 UTCEPSS rescore
  23. 2026-05-29 00:59 UTCEG score recompute
  24. 2026-05-29 00:59 UTCGHSA enrichment
  25. 2026-05-28 13:42 UTCEPSS rescore
  26. 2026-05-28 13:42 UTCEPSS rescore
  27. 2026-05-28 13:42 UTCEPSS rescore
  28. 2026-05-27 13:38 UTCEPSS rescore
  29. 2026-05-27 13:38 UTCEPSS rescore
  30. 2026-05-26 13:41 UTCEPSS rescore
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  37. 2026-05-20 22:37 UTCEPSS rescore
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  39. 2026-05-20 11:21 UTCEPSS rescore
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  42. 2026-05-18 21:29 UTCEPSS rescore
  43. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-24951
    First seen Apr 12, 2013

    ircd-hybrid 8.0.5 - Denial of Service

    Open source ↗

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2013-0238?
CVE-2013-0238 is a none vulnerability published on February 13, 2013. The tryparsev4_netmask function in hostmask.c in IRCD-Hybrid before 8.0.6 does not properly validate masks, which allows remote attackers to cause a denial of service (crash) via a mask that causes a negative number to be parsed.
When was CVE-2013-0238 disclosed?
CVE-2013-0238 was first published in the National Vulnerability Database on February 13, 2013, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2013-0238 actively exploited?
CVE-2013-0238 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 95.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2013-0238?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2013-0238, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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