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Ubuntu Security Notice USN-5658-3

Ubuntu Security Notice USN-5658-3
Posted Nov 22, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5658-3 - USN-5658-1 fixed several vulnerabilities in DHCP. This update provides the corresponding update for Ubuntu 14.04 ESM. It was discovered that DHCP incorrectly handled option reference counting. A remote attacker could possibly use this issue to cause DHCP servers to crash, resulting in a denial of service.

tags | advisory, remote, denial of service, vulnerability
systems | linux, ubuntu
advisories | CVE-2022-2928, CVE-2022-2929
SHA-256 | 832edb6be5e5b86f7d3097da05f4ebf250cd787a63a41670db7033e4bc3c4b32

Ubuntu Security Notice USN-5658-3

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-5658-3
November 21, 2022

isc-dhcp vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 ESM

Summary:

Several security issues were fixed in DHCP.

Software Description:
- isc-dhcp: DHCP server and client

Details:

USN-5658-1 fixed several vulnerabilities in DHCP. This update provides
the corresponding update for Ubuntu 14.04 ESM.

Original advisory details:

It was discovered that DHCP incorrectly handled option reference counting.
A remote attacker could possibly use this issue to cause DHCP servers to
crash, resulting in a denial of service. (CVE-2022-2928)

It was discovered that DHCP incorrectly handled certain memory operations.
A remote attacker could possibly use this issue to cause DHCP clients and
servers to consume resources, leading to a denial of service.
(CVE-2022-2929)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.04 ESM:
isc-dhcp-client 4.2.4-7ubuntu12.13+esm2
isc-dhcp-server 4.2.4-7ubuntu12.13+esm2

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-5658-3
https://ubuntu.com/security/notices/USN-5658-1
CVE-2022-2928, CVE-2022-2929
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