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Debian Security Advisory 5251-1

Debian Security Advisory 5251-1
Posted Oct 13, 2022
Authored by Debian | Site debian.org

Debian Linux Security Advisory 5251-1 - Several vulnerabilities have been discovered in the ISC DHCP client, relay and server.

tags | advisory, vulnerability
systems | linux, debian
advisories | CVE-2022-2928, CVE-2022-2929
SHA-256 | e75a1017009f4cad5bc08bfc50f14390812d8d810301608598ec114925f7bc11

Debian Security Advisory 5251-1

Change Mirror Download
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- -------------------------------------------------------------------------
Debian Security Advisory DSA-5251-1 security@debian.org
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: debian-security-announce@lists.debian.org
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