Vulnerability identifier: #VU45400

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2011-0413

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
DHCP
Server applications / Other server solutions

Vendor: ISC

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The DHCPv6 server in ISC DHCP 4.0.x and 4.1.x before 4.1.2-P1, 4.0-ESV and 4.1-ESV before 4.1-ESV-R1, and 4.2.x before 4.2.1b1 allows remote attackers to cause a denial of service (assertion failure and daemon crash) by sending a message over IPv6 for a declined and abandoned address.

Mitigation
Install update from vendor's website.

Vulnerable software versions

DHCP: 4.0 - 4.0.3, 4.1-esv - 4.1.2, 4.2.0

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External links
http://lists.fedoraproject.org/pipermail/package-announce/2011-February/053644.html
http://secunia.com/advisories/43006
http://secunia.com/advisories/43104
http://secunia.com/advisories/43167
http://secunia.com/advisories/43354
http://secunia.com/advisories/43613
http://securitytracker.com/id?1024999
http://www.debian.org/security/2011/dsa-2184
http://www.isc.org/software/dhcp/advisories/cve-2011-0413
http://www.kb.cert.org/vuls/id/686084
http://www.mandriva.com/security/advisories?name=MDVSA-2011:022
http://www.osvdb.org/70680
http://www.redhat.com/support/errata/RHSA-2011-0256.html
http://www.securityfocus.com/bid/46035
http://www.vupen.com/english/advisories/2011/0235
http://www.vupen.com/english/advisories/2011/0266
http://www.vupen.com/english/advisories/2011/0300
http://www.vupen.com/english/advisories/2011/0400
http://www.vupen.com/english/advisories/2011/0583
http://exchange.xforce.ibmcloud.com/vulnerabilities/64959
http://kb.isc.org/article/AA-00456

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.