[SECURITY] [DLA 2674-1] isc-dhcp security update

2021-06-0311:42:33

lists.debian.org

7.4 High

CVSS3

Attack Vector

ADJACENT_NETWORK

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

3.3 Low

CVSS2

Access Vector

ADJACENT_NETWORK

Access 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

0.003 Low

EPSS

Percentile

67.8%

JSON

Debian LTS Advisory DLA-2674-1 [email protected]
https://www.debian.org/lts/security/ Emilio Pozuelo Monfort
June 03, 2021 https://wiki.debian.org/LTS

Package : isc-dhcp
Version : 4.3.5-3+deb9u2
CVE ID : CVE-2021-25217
Debian Bug : 989157

Jon Franklin and Pawel Wieczorkiewicz found an issue in the ISC DHCP
client and server when parsing lease information, which could lead to
denial of service via application crash.

For Debian 9 stretch, this problem has been fixed in version
4.3.5-3+deb9u2.

We recommend that you upgrade your isc-dhcp packages.

For the detailed security status of isc-dhcp please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/isc-dhcp

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

OSVersionArchitecturePackageVersionFilename
Debian9armhfisc-dhcp-client-ddns< 4.3.5-3+deb9u2isc-dhcp-client-ddns_4.3.5-3+deb9u2_armhf.deb
Debian9amd64isc-dhcp-client-udeb< 4.3.5-3+deb9u2isc-dhcp-client-udeb_4.3.5-3+deb9u2_amd64.deb
Debian10arm64isc-dhcp-client-udeb< 4.4.1-2+deb10u1isc-dhcp-client-udeb_4.4.1-2+deb10u1_arm64.deb
Debian10armhfisc-dhcp-server< 4.4.1-2+deb10u1isc-dhcp-server_4.4.1-2+deb10u1_armhf.deb
Debian10arm64isc-dhcp-relay-dbgsym< 4.4.1-2+deb10u1isc-dhcp-relay-dbgsym_4.4.1-2+deb10u1_arm64.deb
Debian10mipselisc-dhcp-relay< 4.4.1-2+deb10u1isc-dhcp-relay_4.4.1-2+deb10u1_mipsel.deb
Debian10mipsisc-dhcp-server-dbgsym< 4.4.1-2+deb10u1isc-dhcp-server-dbgsym_4.4.1-2+deb10u1_mips.deb
Debian10mipselisc-dhcp-server< 4.4.1-2+deb10u1isc-dhcp-server_4.4.1-2+deb10u1_mipsel.deb
Debian9i386isc-dhcp-common< 4.3.5-3+deb9u2isc-dhcp-common_4.3.5-3+deb9u2_i386.deb
Debian10mipselisc-dhcp-common< 4.4.1-2+deb10u1isc-dhcp-common_4.4.1-2+deb10u1_mipsel.deb

OS	Version	Architecture	Package	Version	Filename
Debian	9	armhf	isc-dhcp-client-ddns	< 4.3.5-3+deb9u2	isc-dhcp-client-ddns_4.3.5-3+deb9u2_armhf.deb
Debian	9	amd64	isc-dhcp-client-udeb	< 4.3.5-3+deb9u2	isc-dhcp-client-udeb_4.3.5-3+deb9u2_amd64.deb
Debian	10	arm64	isc-dhcp-client-udeb	< 4.4.1-2+deb10u1	isc-dhcp-client-udeb_4.4.1-2+deb10u1_arm64.deb
Debian	10	armhf	isc-dhcp-server	< 4.4.1-2+deb10u1	isc-dhcp-server_4.4.1-2+deb10u1_armhf.deb
Debian	10	arm64	isc-dhcp-relay-dbgsym	< 4.4.1-2+deb10u1	isc-dhcp-relay-dbgsym_4.4.1-2+deb10u1_arm64.deb
Debian	10	mipsel	isc-dhcp-relay	< 4.4.1-2+deb10u1	isc-dhcp-relay_4.4.1-2+deb10u1_mipsel.deb
Debian	10	mips	isc-dhcp-server-dbgsym	< 4.4.1-2+deb10u1	isc-dhcp-server-dbgsym_4.4.1-2+deb10u1_mips.deb
Debian	10	mipsel	isc-dhcp-server	< 4.4.1-2+deb10u1	isc-dhcp-server_4.4.1-2+deb10u1_mipsel.deb
Debian	9	i386	isc-dhcp-common	< 4.3.5-3+deb9u2	isc-dhcp-common_4.3.5-3+deb9u2_i386.deb
Debian	10	mipsel	isc-dhcp-common	< 4.4.1-2+deb10u1	isc-dhcp-common_4.4.1-2+deb10u1_mipsel.deb