#VU32777 Buffer overflow in DHCP - CVE-2012-3571

Vulnerability identifier: #VU32777

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2012-3571

CWE-ID: CWE-119

Exploitation vector: Local 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.

ISC DHCP 4.1.2 through 4.2.4 and 4.1-ESV before 4.1-ESV-R6 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a malformed client identifier.

Mitigation
Install update from vendor's website.

Vulnerable software versions

DHCP: 4.1.2, 4.2.4

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External links
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761
https://lists.opensuse.org/opensuse-updates/2012-08/msg00030.html
https://rhn.redhat.com/errata/RHSA-2012-1140.html
https://rhn.redhat.com/errata/RHSA-2012-1141.html
https://security.gentoo.org/glsa/glsa-201301-06.xml
https://www.debian.org/security/2012/dsa-2516
https://www.debian.org/security/2012/dsa-2519
https://www.mandriva.com/security/advisories?name=MDVSA-2012:115
https://www.mandriva.com/security/advisories?name=MDVSA-2012:116
https://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
https://www.securityfocus.com/bid/54665
https://www.ubuntu.com/usn/USN-1519-1
https://kb.isc.org/article/AA-00712

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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.