Log in Start free

Vulnerability · Published Oct 7, 2022 · Assigned by isc

CVE-2022-2929DHCP memory leak

Medium 6.5

In plain English

A medium-severity security flaw in ISC DHCP from ISC. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.7%top 48.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In ISC DHCP 1.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1 a system with access to a DHCP server, sending DHCP packets crafted to include fqdn labels longer than 63 bytes, could eventually cause the server to run out of memory.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8dhcp-client12:4.3.6-49.el8ALSA-2023:3000
AlmaLinux:9dhcp-client12:4.4.2-18.b1.el9ALSA-2023:2502
AlmaLinux:8dhcp-common12:4.3.6-49.el8ALSA-2023:3000
AlmaLinux:9dhcp-common12:4.4.2-18.b1.el9ALSA-2023:2502
AlmaLinux:8dhcp-libs12:4.3.6-49.el8ALSA-2023:3000
AlmaLinux:8dhcp-relay12:4.3.6-49.el8ALSA-2023:3000
AlmaLinux:9dhcp-relay12:4.4.2-18.b1.el9ALSA-2023:2502
AlmaLinux:8dhcp-server12:4.3.6-49.el8ALSA-2023:3000
AlmaLinux:9dhcp-server12:4.4.2-18.b1.el9ALSA-2023:2502
Alpine:v3.20dhcp4.4.3_p1-r0ALPINE-CVE-2022-2929
Debian:12isc-dhcp4.4.3-2.1DEBIAN-CVE-2022-2929
Debian:13isc-dhcp4.4.3-2.1DEBIAN-CVE-2022-2929
Ubuntu:22.04:LTSisc-dhcp4.4.1-2.3ubuntu2.3USN-5658-1
Ubuntu:22.04:LTSisc-dhcp4.4.1-2.3ubuntu2.3UBUNTU-CVE-2022-2929

Affected products (as reported)

VendorProductVersions
ISC ISC DHCP 1.0 through versions before 4.1-ESV-R16-P24.2 through versions before 4.4.3.-P1

References