medium
6.5
CWE
770
Advisory Published
Updated

CVE-2022-2929: DHCP memory leak

First published: Fri Oct 07 2022(Updated: )

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.

Credit: security-officer@isc.org

Affected SoftwareAffected VersionHow to fix
ISC DHCP Server>=1.0.0<4.1-esv
ISC DHCP Server>=4.2.0<=4.4.3
ISC DHCP Server=4.1-esv-r1
ISC DHCP Server=4.1-esv-r10
ISC DHCP Server=4.1-esv-r10_b1
ISC DHCP Server=4.1-esv-r10_rc1
ISC DHCP Server=4.1-esv-r10b1
ISC DHCP Server=4.1-esv-r10rc1
ISC DHCP Server=4.1-esv-r11
ISC DHCP Server=4.1-esv-r11_b1
ISC DHCP Server=4.1-esv-r11_rc1
ISC DHCP Server=4.1-esv-r11_rc2
ISC DHCP Server=4.1-esv-r11b1
ISC DHCP Server=4.1-esv-r11rc1
ISC DHCP Server=4.1-esv-r11rc2
ISC DHCP Server=4.1-esv-r12
ISC DHCP Server=4.1-esv-r12-p1
ISC DHCP Server=4.1-esv-r12_b1
ISC DHCP Server=4.1-esv-r12_p1
ISC DHCP Server=4.1-esv-r12b1
ISC DHCP Server=4.1-esv-r13
ISC DHCP Server=4.1-esv-r13_b1
ISC DHCP Server=4.1-esv-r13b1
ISC DHCP Server=4.1-esv-r14
ISC DHCP Server=4.1-esv-r14_b1
ISC DHCP Server=4.1-esv-r14b1
ISC DHCP Server=4.1-esv-r15
ISC DHCP Server=4.1-esv-r15-p1
ISC DHCP Server=4.1-esv-r15_b1
ISC DHCP Server=4.1-esv-r16
ISC DHCP Server=4.1-esv-r16-p1
Debian Debian Linux=10.0
Fedoraproject Fedora=35
Fedoraproject Fedora=36
Fedoraproject Fedora=37

Remedy

Upgrade to the patched release most closely related to your current version of ISC DHCP. These can all be downloaded from https://www.isc.org/downloads. 4.4.3-P1 4.1-ESV-R16-P2

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Reference Links

Frequently Asked Questions

  • What is CVE-2022-2929?

    CVE-2022-2929 is a vulnerability in ISC DHCP that could allow an attacker to cause the DHCP server to run out of memory.

  • Which versions of ISC DHCP are affected by CVE-2022-2929?

    ISC DHCP versions 1.0 to 4.4.3 and 4.1-ESV-R1 to 4.1-ESV-R16-P1 are affected by CVE-2022-2929.

  • What is the severity of CVE-2022-2929?

    CVE-2022-2929 has a severity score of 6.5, which is considered medium.

  • How can CVE-2022-2929 be fixed?

    To fix CVE-2022-2929, it is recommended to update to a patched version of ISC DHCP.

  • Where can I find more information about CVE-2022-2929?

    More information about CVE-2022-2929 can be found in the references provided: [reference 1](https://kb.isc.org/docs/cve-2022-2929), [reference 2](https://lists.debian.org/debian-lts-announce/2022/10/msg00015.html), [reference 3](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2SARIK7KZ7MGQIWDRWZFAOSQSPXY4GOU/)

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