Is CVE-2009-4893 actively exploited?

CVE-2009-4893 has no public evidence of in-the-wild exploitation as of 2025-04-11.

What is the CVSS score for CVE-2009-4893?

CVE-2009-4893 has a CVSS score of 6.8 (UNKNOWN severity). Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P.

How do I patch CVE-2009-4893?

Patch guidance is available from unrealircd security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2009-4893.

CVE-2009-4893 - remediation guidance & executive summary

Q: Which products are affected by CVE-2009-4893?

31 products: unrealircd unrealircd, unrealircd unrealircd, unrealircd unrealircd, unrealircd unrealircd, unrealircd unrealircd, and 26 more.

Description

Buffer overflow in UnrealIRCd 3.2beta11 through 3.2.8, when allow::options::noident is enabled, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unspecified vectors.

CVSS Metrics

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Access Vector: network
Access Cmplx: medium
Auth: none
Confidentiality: partial
Integrity: partial
Availability: partial
Weaknesses: CWE-119 · Memory Buffer Errors

Metadata

Primary Vendor: UNREALIRCD
Published: 6/15/2010
Last Modified: 4/11/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

unrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircdunrealircd : unrealircd

Remediation Guidance

Executive Summary

View on NIST NVD