ISC DHCPD up to 4.3.0 - 4.3.3 IPv4 UDP Length input validation

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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in ISC DHCPD 4.0.x/4.1-ESV - 4.1-ESV-R12/4.1.x/4.2.x/4.3.0 - 4.3.3. Affected by this vulnerability is an unknown functionality of the component IPv4 UDP Length Handler. Such manipulation leads to input validation. This vulnerability is traded as CVE-2015-8605. Access to the local network is required for this attack to succeed. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in ISC DHCPD 4.0.x/4.1-ESV - 4.1-ESV-R12/4.1.x/4.2.x/4.3.0 - 4.3.3 (Network Management Software). It has been rated as critical. Affected by this issue is an unknown function of the component IPv4 UDP Length Handler. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. CVE summarizes:

ISC DHCP 4.x before 4.1-ESV-R12-P1 and 4.2.x and 4.3.x before 4.3.3-P1 allows remote attackers to cause a denial of service (application crash) via an invalid length field in a UDP IPv4 packet.
The advisory summarizes:
A server, client, or relay that is built to only be able to process unicast packets (i.e. those that have already been processed by the OS UDP/IP stack) is not affected, however this build configuration is not normally viable for clients and relays. Servers with this build configuration require a relay in order to be able to process DISCOVER and other broadcast requests from clients. Not all potentially-affected builds will actually be affected, but because it is difficult to identify or predict those which should be upgraded, our advice is that all builds should be considered vulnerable.

The weakness was shared 01/12/2016 by Sebastian Poehn with Sophos as AA-01334 as confirmed advisory (Website). The advisory is available at kb.isc.org. The vendor cooperated in the coordination of the public release. This vulnerability is handled as CVE-2015-8605 since 12/16/2015. The attack needs to approached within the local network. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 87971 (Amazon Linux AMI : dhcp (ALAS-2016-637)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 43511 (HPE ArubaOS Multiple Vulnerabilities (ARUBA-PSA-2016-007)).

Upgrading to version 4.1-ESV-R12-P1 or 4.3.3-P1 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (87971), SecurityFocus (BID 80703†), SecurityTracker (ID 1034657†) and Vulnerability Center (SBV-56297†). The entries VDB-80766, VDB-81484 and VDB-81522 are related to this item. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 87971
Nessus Name: Amazon Linux AMI : dhcp (ALAS-2016-637)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703442
OpenVAS Name: Debian Security Advisory DSA 3442-1 (isc-dhcp - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: DHCPD 4.1-ESV-R12-P1/4.3.3-P1
Workaround: Hardening
Fortigate IPS: 🔍

Timelineinfo

12/16/2015 🔍
01/11/2016 +26 days 🔍
01/12/2016 +0 days 🔍
01/12/2016 +0 days 🔍
01/12/2016 +0 days 🔍
01/13/2016 +0 days 🔍
01/14/2016 +1 days 🔍
01/14/2016 +0 days 🔍
01/18/2016 +4 days 🔍
01/30/2016 +12 days 🔍
05/05/2019 +1190 days 🔍

Sourcesinfo

Vendor: isc.org

Advisory: AA-01334
Researcher: Sebastian Poehn
Organization: Sophos
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2015-8605 (🔍)
GCVE (CVE): GCVE-0-2015-8605
GCVE (VulDB): GCVE-100-80234

OVAL: 🔍

SecurityFocus: 80703 - ISC DHCP CVE-2015-8605 Remote Denial of Service Vulnerability
SecurityTracker: 1034657
Vulnerability Center: 56297 - ISC DHCP Remote DoS via a Crafted UDP IPv4 Packet, Medium

See also: 🔍

Entryinfo

Created: 01/14/2016 11:54
Updated: 05/05/2019 16:06
Changes: 01/14/2016 11:54 (87), 05/05/2019 16:06 (14)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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