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Vulnerability record · CVE-2009-4893 · published 15 June 2010

CVE-2009-4893: Unrealircd memory buffer overflow vulnerability

Unrealircd · Unrealircd

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.

6.8 CVSS 2.0 Medium EPSS 2.5% · top 15.9% CWE-119 · Memory buffer overflow
6.8CVSS 2.0 base score
2.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
16 Jun 2026Last modified by NVD

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.

AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://security.gentoo.org/glsa/glsa-201006-21.xml
http://www.openwall.com/lists/oss-security/2010/06/14/13
http://www.securityfocus.com/bid/42077
http://www.unrealircd.com/txt/unrealsecadvisory.20090413.txt Vendor Advisory
http://security.gentoo.org/glsa/glsa-201006-21.xml
http://www.openwall.com/lists/oss-security/2010/06/14/13
http://www.securityfocus.com/bid/42077
http://www.unrealircd.com/txt/unrealsecadvisory.20090413.txt Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2009-4893), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.