CVE-2022-2929
published 2022-10-07CVE-2022-2929: 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…
PriorityP427medium6.5CVSS 3.1
AVAACLPRNUINSUCNINAH
EPSS
0.66%
51.2th percentile
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
16 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | isc-dhcp | < isc-dhcp 4.4.3-2.1 (bookworm) | isc-dhcp 4.4.3-2.1 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| isc | dhcp | — | — |
| isc | dhcp | >= 1.0.0 < 4.1-esv | 4.1-esv |
| isc | dhcp | 4.2.0 – 4.4.3 | — |
| isc | isc_dhcp | — | — |
| isc | isc_dhcp | — | — |
| msrc | azl3_dhcp_4.4.3-2_on_azure_linux_3.0 | — | — |
| msrc | azl3_dhcp_4.4.3.p1-1_on_azure_linux_3.0 | — | — |
| msrc | azure_linux_3.0_arm | — | — |
| msrc | azure_linux_3.0_x64 | — | — |
| msrc | cbl2_dhcp_4.4.3-3_on_cbl_mariner_2.0 | — | — |
| msrc | cm1_dhcp_4.4.2-3_on_cbl_mariner_1.0 | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
osv6.5MEDIUM
vendor_debian6.5MEDIUM
vendor_msrc6.5MEDIUM
vendor_redhat6.5MEDIUM
vendor_ubuntu6.5MEDIUM
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OSV
isc-dhcp vulnerabilities
osv·2022-11-21·CVSS 6.5
CVE-2022-2928 [MEDIUM] isc-dhcp vulnerabilities
isc-dhcp vulnerabilities
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)
OSV
isc-dhcp vulnerabilities
osv·2022-11-07·CVSS 6.5
CVE-2022-2928 [MEDIUM] isc-dhcp vulnerabilities
isc-dhcp vulnerabilities
USN-5658-1 fixed vulnerabilities in DHCP. This update provides
the corresponding updates for Ubuntu 16.04 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)
GHSA
GHSA-wjcc-8xx5-frqg: In ISC DHCP 1
ghsa_unreviewed·2022-10-07
CVE-2022-2929 [MEDIUM] CWE-770 GHSA-wjcc-8xx5-frqg: In ISC DHCP 1
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.
OSV
CVE-2022-2929: In ISC DHCP 1
osv·2022-10-07·CVSS 6.5
CVE-2022-2929 [MEDIUM] CVE-2022-2929: In ISC DHCP 1
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.
OSV
isc-dhcp vulnerabilities
osv·2022-10-05·CVSS 6.5
CVE-2022-2928 [MEDIUM] isc-dhcp vulnerabilities
isc-dhcp vulnerabilities
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)
Ubuntu
DHCP vulnerabilities
vendor_ubuntu·2022-11-21·CVSS 6.5
CVE-2022-2929 [MEDIUM] DHCP vulnerabilities
Title: DHCP vulnerabilities
Summary: Several security issues were fixed in DHCP.
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)
Instructions: In general, a standard system update will make all the necessary changes.
Ubuntu
DHCP vulnerabilities
vendor_ubuntu·2022-11-07·CVSS 6.5
CVE-2022-2928 [MEDIUM] DHCP vulnerabilities
Title: DHCP vulnerabilities
Summary: Several security issues were fixed in DHCP.
USN-5658-1 fixed vulnerabilities in DHCP. This update provides
the corresponding updates for Ubuntu 16.04 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)
Instructions: In general, a standard system update will make all the necessary changes.
Microsoft
DHCP memory leak
vendor_msrc·2022-10-11·CVSS 6.5
CVE-2022-2929 [MEDIUM] CWE-770 DHCP memory leak
DHCP memory leak
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
isc: isc
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference: https://learn.microsoft.com/en-us/azure/azure-linux/tuto
Red Hat
dhcp: DHCP memory leak
vendor_redhat·2022-10-05·CVSS 6.5
CVE-2022-2929 [MEDIUM] dhcp: DHCP memory leak
dhcp: DHCP memory leak
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.
A vulnerability was found in the DHCP server where the "fqdn_universe_decode()" function allocates buffer space for the contents of option 81 (fqdn) data received in a DHCP packet. The maximum length of a DNS "label" is 63 bytes. The function tests the length byte of each label contained in the "fqdn"; if it finds a label whose length byte value is larger than 63, it returns without dereferencing the buffer space. This issue causes a memory leak. On a system with access to a DHCP server, an attacker from any adjacent network could send
Ubuntu
DHCP vulnerabilities
vendor_ubuntu·2022-10-05·CVSS 6.5
CVE-2022-2929 [MEDIUM] DHCP vulnerabilities
Title: DHCP vulnerabilities
Summary: Several security issues were fixed in DHCP.
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)
Instructions: In general, a standard system update will make all the necessary changes.
Debian
CVE-2022-2929: isc-dhcp - In ISC DHCP 1.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1 a system with ac...
vendor_debian·2022·CVSS 6.5
CVE-2022-2929 [MEDIUM] CVE-2022-2929: isc-dhcp - In ISC DHCP 1.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1 a system with ac...
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.
Scope: local
bookworm: resolved (fixed in 4.4.3-2.1)
bullseye: resolved (fixed in 4.4.1-2.3+deb11u1)
sid: resolved (fixed in 4.4.3-2.1)
trixie: resolved (fixed in 4.4.3-2.1)
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://kb.isc.org/docs/cve-2022-2929https://lists.debian.org/debian-lts-announce/2022/10/msg00015.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2SARIK7KZ7MGQIWDRWZFAOSQSPXY4GOU/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QQXYCIWUDILRCNBAIMVFCSGXBRKEPB4K/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T6IBFH4MRRNJQVWEKILQ6I6CXWW766FX/https://security.gentoo.org/glsa/202305-22https://kb.isc.org/docs/cve-2022-2929https://lists.debian.org/debian-lts-announce/2022/10/msg00015.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2SARIK7KZ7MGQIWDRWZFAOSQSPXY4GOU/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QQXYCIWUDILRCNBAIMVFCSGXBRKEPB4K/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T6IBFH4MRRNJQVWEKILQ6I6CXWW766FX/https://security.gentoo.org/glsa/202305-22
2022-10-07
Published