CVE-2022-2929: DHCP memory leak

Published Oct 4, 2022
·
Updated

A vulnerability was found in DHCP, where, 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.

Versions affected:

- 1.0.0 -> 4.1-ESV-R16-P1 - 4.2.0 -> 4.4.3

Other sources

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.

— MITRE

Affected Software

48 affected componentsFixes available
ISC DHCP>=1.0.0<4.1-esv
ISC DHCP>=4.2.0<=4.4.3
ISC DHCP=4.1-esv-r1
ISC DHCP=4.1-esv-r10
ISC DHCP=4.1-esv-r10_b1
ISC DHCP=4.1-esv-r10_rc1
ISC DHCP=4.1-esv-r10b1
ISC DHCP=4.1-esv-r10rc1
ISC DHCP=4.1-esv-r11
ISC DHCP=4.1-esv-r11_b1
ISC DHCP=4.1-esv-r11_rc1
ISC DHCP=4.1-esv-r11_rc2
ISC DHCP=4.1-esv-r11b1
ISC DHCP=4.1-esv-r11rc1
ISC DHCP=4.1-esv-r11rc2
ISC DHCP=4.1-esv-r12
ISC DHCP=4.1-esv-r12-p1
ISC DHCP=4.1-esv-r12_b1
ISC DHCP=4.1-esv-r12_p1
ISC DHCP=4.1-esv-r12b1
ISC DHCP=4.1-esv-r13
ISC DHCP=4.1-esv-r13_b1
ISC DHCP=4.1-esv-r13b1
ISC DHCP=4.1-esv-r14
ISC DHCP=4.1-esv-r14_b1
ISC DHCP=4.1-esv-r14b1
ISC DHCP=4.1-esv-r15
ISC DHCP=4.1-esv-r15-p1
ISC DHCP=4.1-esv-r15_b1
ISC DHCP=4.1-esv-r16
ISC DHCP=4.1-esv-r16-p1
Debian Debian Linux=10.0
Fedoraproject Fedora=35
Fedoraproject Fedora=36
Fedoraproject Fedora=37
debian/isc-dhcp
4.4.3-P1-24.4.3-P1-8
alpine/dhcp>=1.0.0<4.4.3_p1-r0
4.4.3_p1-r0
alpine/dhcp>=1.0.0<4.4.3_p1-r0
4.4.3_p1-r0
alpine/dhcp>=1.0.0<4.4.3_p1-r0
4.4.3_p1-r0
alpine/dhcp>=1.0.0<4.4.3_p1-r0
4.4.3_p1-r0
alpine/dhcp>=1.0.0<4.4.3_p1-r0
4.4.3_p1-r0
alpine/dhcp>=1.0.0<4.4.3_p1-r0
4.4.3_p1-r0
alpine/dhcp>=1.0.0<4.4.3_p1-r0
4.4.3_p1-r0
alpine/dhcp>=1.0.0<4.4.3_p1-r0
4.4.3_p1-r0
debian/isc-dhcp<4.4.3-2.1
4.4.3-2.1
debian/isc-dhcp<4.4.3-2.1
4.4.3-2.1
redhat/dhcp<4.4.3
4.4.3
redhat/dhcp<4.1
4.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/isc-dhcp to a version that resolves this vulnerability.

    Fixed in 4.4.3-P1-2Fixed in 4.4.3-P1-8
  2. Upgrade

    Upgrade alpine/dhcp to a version that resolves this vulnerability.

    Fixed in 4.4.3_p1-r0
  3. Upgrade

    Upgrade debian/isc-dhcp to a version that resolves this vulnerability.

    Fixed in 4.4.3-2.1
  4. Upgrade

    Upgrade redhat/dhcp to a version that resolves this vulnerability.

    Fixed in 4.4.3
  5. Upgrade

    Upgrade redhat/dhcp to a version that resolves this vulnerability.

    Fixed in 4.1
  6. Upgrade

    Upgrade ISC DHCP to a version that resolves this vulnerability.

    Fixed in 4.4.3-P1
  7. Upgrade

    Upgrade ISC DHCP to a version that resolves this vulnerability.

    Fixed in 4.1-ESV-R16-P2

Event History

Oct 4, 2022
Data Sourced
via Red Hat·12:39 PM
DescriptionSeverityAffected Software
Oct 7, 2022
CVE Published
via MITRE·04:45 AM
Data Sourced
via MITRE·04:45 AM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·05:15 AM
DescriptionSeverityWeaknessAffected Software
Data Sourced
via OSV·05:15 AM
DescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

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.

2

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.

3

What is the severity of CVE-2022-2929?

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

4

How can CVE-2022-2929 be fixed?

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

5

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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