ISC DHCP up to 4.1-ESV-R15/4.2.8/4.3.6/4.4.0 Options Response memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability was found in ISC DHCP up to 4.1-ESV-R15/4.2.8/4.3.6/4.4.0. It has been classified as critical. Affected is an unknown function of the component Options Handler. This manipulation as part of Response causes memory corruption. This vulnerability is tracked as CVE-2018-5732. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in ISC DHCP up to 4.1-ESV-R15/4.2.8/4.3.6/4.4.0 (Network Management Software). It has been declared as critical. Affected by this vulnerability is an unknown code block of the component Options Handler. The manipulation as part of a Response leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect availability. The summary by CVE is:

Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause a buffer overflow (and resulting crash) in dhclient by sending a response containing a specially constructed options section. Affects ISC DHCP versions 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0

The bug was discovered 02/28/2018. The weakness was disclosed 10/09/2019 (Website). The advisory is shared at kb.isc.org. This vulnerability is known as CVE-2018-5732 since 01/17/2018. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 36 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 108847 (Amazon Linux AMI : dhcp (ALAS-2018-984)), 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 11978 (McAfee Web Gateway Multiple Vulnerabilities (SB10231)).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (108847). The entry VDB-129815 is pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector (Internet Systems Consortium (ISC)): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 108847
Nessus Name: Amazon Linux AMI : dhcp (ALAS-2018-984)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 900031
OpenVAS Name: Debian LTS Advisory ([SECURITY] [DLA 1313-1] isc-dhcp security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/17/2018 🔍
02/28/2018 +42 days 🔍
04/05/2018 +36 days 🔍
04/06/2018 +1 days 🔍
10/09/2019 +551 days 🔍
10/10/2019 +1 days 🔍
07/17/2024 +1741 days 🔍

Sourcesinfo

Vendor: isc.org

Advisory: kb.isc.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-5732 (🔍)
GCVE (CVE): GCVE-0-2018-5732
GCVE (VulDB): GCVE-100-143197

OVAL: 🔍

OSVDB: - CVE-2018-5732 - dhcp - Buffer Overflow Issue

See also: 🔍

Entryinfo

Created: 10/10/2019 08:23
Updated: 07/17/2024 01:49
Changes: 10/10/2019 08:23 (74), 09/28/2020 21:28 (1), 01/05/2024 14:35 (13), 07/17/2024 01:49 (16)
Complete: 🔍
Cache ID: 216::103

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