Vulnerability identifier: #VU44406

Vulnerability risk: Medium

CVSSv3.1: 6 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2011-4868

CWE-ID: CWE-476

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
DHCP
Server applications / Other server solutions

Vendor: ISC

Description

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

The vulnerability exists due to a NULL pointer dereference error. A remote attacker can trigger denial of service conditions via crafted packets related to a lease-status update.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

DHCP: 3.0 - 3.0.6, 3.1.0, 4.0.0, 4.1.0, 4.2.0 - 4.2.3

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External links
http://security.gentoo.org/glsa/glsa-201301-06.xml
http://deepthought.isc.org/article/AA-00595
http://kb.isc.org/article/AA-00705
http://www.isc.org/software/dhcp/advisories/cve-2011-4868

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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 local network (LAN).

Is there known malware, which exploits this vulnerability?

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