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Last updated: 5/25/2016 7:45:09 PM

CVE Publication rate: 20.83

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National Cyber Awareness System

Vulnerability Summary for CVE-2013-0238

Original release date: 02/12/2013
Last revised: 02/06/2014


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 Severity (version 2.0):
CVSS v2 Base Score: 5.0 MEDIUM
Impact Subscore: 2.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows disruption of service

References to Advisories, Solutions, and Tools

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External Source: DEBIAN
Name: DSA-2618
External Source: CONFIRM
Name: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=699267
External Source: XF
Name: ircdhybrid-tryparsev4netmask-dos(81695)
External Source: CONFIRM
Name: https://wiki.mageia.org/en/Support/Advisories/MGASA-2013-0055
External Source: BID
Name: 57610
External Source: MANDRIVA
Name: MDVSA-2013:093
External Source: EXPLOIT-DB
Name: 24951
External Source: CONFIRM
Name: http://svn.ircd-hybrid.org:8000/viewcvs.cgi/ircd-hybrid/trunk/src/hostmask.c?r1=1786&r2=1785&pathrev=1786
External Source: MLIST
Name: [oss-security] 20130129 ircd-hybrid: Denial of service vulnerability in hostmask.c:try_parse_v4_netmask()

Technical Details

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