ArchLinuxASA-202106-10[ASA-202106-10] dhclient: arbitrary code execution
3.3 Low
CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:A/AC:L/Au:N/C:N/I:N/A:P
7.4 High
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
0.003 Low
EPSS
Percentile
68.4%
Arch Linux Security Advisory ASA-202106-10
Severity: High
Date : 2021-06-01
CVE-ID : CVE-2021-25217
Package : dhclient
Type : arbitrary code execution
Remote : Yes
Link : https://security.archlinux.org/AVG-2004
Summary
The package dhclient before version 4.4.2.P1-1 is vulnerable to
arbitrary code execution.
Resolution
Upgrade to 4.4.2.P1-1.
pacman -Syu “dhclient>=4.4.2.P1-1”
The problem has been fixed upstream in version 4.4.2.P1.
Workaround
None.
Description
A buffer overrun in the lease file parsing code can be used to exploit
a common vulnerability shared by dhcpd and dhclient before version
4.4.2-P1.
Impact
An attacker could crash the DHCP client, or potentially execute
arbitrary code, through a crafted lease file.
References
https://kb.isc.org/docs/cve-2021-25217
https://downloads.isc.org/isc/dhcp/4.4.2-P1/patches/4.4.2.CVE-2021-25217.patch
https://security.archlinux.org/CVE-2021-25217
Related
3.3 Low
CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:A/AC:L/Au:N/C:N/I:N/A:P
7.4 High
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
0.003 Low
EPSS
Percentile
68.4%