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HistoryOct 06, 2022 - 7:02 p.m.

[SECURITY] [DSA 5251-1] isc-dhcp security update

2022-10-0619:02:22
lists.debian.org
28
isc-dhcp
cve-2022-2928
cve-2022-2929
debian
denial of service

CVSS3

6.5

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

7.7

Confidence

High

EPSS

0.001

Percentile

43.6%


Debian Security Advisory DSA-5251-1 [email protected]
https://www.debian.org/security/ Salvatore Bonaccorso
October 06, 2022 https://www.debian.org/security/faq


Package : isc-dhcp
CVE ID : CVE-2022-2928 CVE-2022-2929
Debian Bug : 1021320

Several vulnerabilities have been discovered in the ISC DHCP client,
relay and server.

CVE-2022-2928

It was discovered that the DHCP server does not correctly perform
option reference counting when configured with "allow leasequery;".
A remote attacker can take advantage of this flaw to cause a denial
of service (daemon crash).

CVE-2022-2929

It was discovered that the DHCP server is prone to a memory leak
flaw when handling contents of option 81 (fqdn) data received in
a DHCP packet. A remote attacker can take advantage of this flaw
to cause DHCP servers to consume resources, resulting in denial
of service.

For the stable distribution (bullseye), these problems have been fixed in
version 4.4.1-2.3+deb11u1.

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 Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: [email protected]

CVSS3

6.5

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

7.7

Confidence

High

EPSS

0.001

Percentile

43.6%