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HistoryJun 03, 2021 - 11:42 a.m.

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

2021-06-0311:42:33
lists.debian.org
72
debian
isc-dhcp
security update
denial of service
cve-2021-25217
debian stretch

CVSS2

3.3

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

CVSS3

7.4

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

AI Score

7.7

Confidence

High

EPSS

0.003

Percentile

68.3%


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

CVSS2

3.3

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

CVSS3

7.4

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

AI Score

7.7

Confidence

High

EPSS

0.003

Percentile

68.3%