Medium severity · published Oct 7, 2022
CVE-2022-2929
DHCP memory leak
6.5
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ID
ISC DHCP · ISC
1.0 through versions before 4.1-ESV-R16-P2; 4.2 through versions before 4.4.3.-P1 · source: vendor
DL
Debian Linux · Debian
10.0 · source: NVD
DH
Dhcp · Isc
1.0.0 before 4.1-esv; 4.2.0 through 4.4.3; 4.1-esv; 4.1-esv; 4.1-esv; 4.1-esv; +25 more · source: NVD
FE
Fedora · Fedoraproject
35; 36; 37 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-2929
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-2929
Vendor Advisory
https://kb.isc.org/docs/cve-2022-2929
Mailing List
https://lists.debian.org/debian-lts-announce/2022/10/msg00015.html
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2SARIK7KZ7MGQIWDRWZFAOSQSPXY4GOU/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QQXYCIWUDILRCNBAIMVFCSGXBRKEPB4K/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T6IBFH4MRRNJQVWEKILQ6I6CXWW766FX/
security.gentoo.org
https://security.gentoo.org/glsa/202305-22
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Failure to properly clean up closed OMAPI connections can exhaust available sockets
7.5
CVE-2018-5733
A malicious client can overflow a reference counter in ISC dhcpd
6.5
CVE-2022-2928
An option refcount overflow exists in dhcpd