CVE-2013-0238

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 10.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2013-02-13 · updated 2026-06-16
Weakness: CWE-20

Description

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.

Affected products

Ircd-Hybrid: through 8.0.5; 7.2.0, 7.2.1, 7.2.2, 7.2.3, 7.3.0, 7.3.0-rc1 (+10)

References

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=699267
http://osvdb.org/89623
http://secunia.com/advisories/51948
http://secunia.com/advisories/52106
http://svn.ircd-hybrid.org:8000/viewcvs.cgi/ircd-hybrid/trunk/src/hostmask.c?r1=1786&r2=1785&pathrev=1786
http://www.debian.org/security/2013/dsa-2618
http://www.exploit-db.com/exploits/24951
http://www.mandriva.com/security/advisories?name=MDVSA-2013:093
http://www.openwall.com/lists/oss-security/2013/01/29/8
http://www.securityfocus.com/bid/57610
https://exchange.xforce.ibmcloud.com/vulnerabilities/81695
https://wiki.mageia.org/en/Support/Advisories/MGASA-2013-0055

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