CVE-2020-7461

high
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

In FreeBSD 12.1-STABLE before r365010, 11.4-STABLE before r365011, 12.1-RELEASE before p9, 11.4-RELEASE before p3, and 11.3-RELEASE before p13, dhclient(8) fails to handle certain malformed input related to handling of DHCP option 119 resulting a heap overflow. The heap overflow could in principle be exploited to achieve remote code execution. The affected process runs with reduced privileges in a Capsicum sandbox, limiting the immediate impact of an exploit.

References

https://security.FreeBSD.org/advisories/FreeBSD-SA-20:26.dhclient.asc

https://cert-portal.siemens.com/productcert/pdf/ssa-288459.pdf

Details

Source: MITRE

Published: 2021-03-26

Updated: 2021-09-16

Type: CWE-787

Risk Information

CVSS v2

Base Score: 7.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 10

Severity: HIGH

CVSS v3

Base Score: 7.3

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Impact Score: 3.4

Exploitability Score: 3.9

Severity: HIGH

Tenable Plugins

View all (1 total)

IDNameProductFamilySeverity
140236FreeBSD : FreeBSD -- dhclient heap overflow (762b7d4a-ec19-11ea-88f8-901b0ef719ab)NessusFreeBSD Local Security Checks
high