dhcpcd up to 6.11.6/7.2.1 dhcp6.c out-of-bounds

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in dhcpcd up to 6.11.6/7.2.1. Affected by this vulnerability is an unknown functionality of the file dhcp6.c. The manipulation leads to out-of-bounds. This vulnerability is uniquely identified as CVE-2019-11766. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in dhcpcd up to 6.11.6/7.2.1. It has been rated as critical. This issue affects an unknown functionality of the file dhcp6.c. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

dhcp6.c in dhcpcd before 6.11.7 and 7.x before 7.2.2 has a buffer over-read in the D6_OPTION_PD_EXCLUDE feature.

The bug was discovered 05/04/2019. The weakness was disclosed 05/05/2019 (Website). It is possible to read the advisory at securityfocus.com. The identification of this vulnerability is CVE-2019-11766 since 05/05/2019. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 256760 (Linux Distros Unpatched Vulnerability : CVE-2019-11766), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.11.7 or 7.2.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (256760). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / 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: 256760
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2019-11766

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: dhcpcd 6.11.7/7.2.2
Patch: roy.marples.name

Timelineinfo

05/04/2019 🔍
05/05/2019 +1 days 🔍
05/05/2019 +0 days 🔍
05/05/2019 +0 days 🔍
08/27/2025 +2306 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Status: Confirmed

CVE: CVE-2019-11766 (🔍)
GCVE (CVE): GCVE-0-2019-11766
GCVE (VulDB): GCVE-100-134387
SecurityFocus: 108172

Entryinfo

Created: 05/05/2019 13:45
Updated: 08/27/2025 21:46
Changes: 05/05/2019 13:45 (55), 06/07/2020 06:50 (2), 09/12/2023 14:13 (5), 08/27/2025 21:46 (19)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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