6.5 Medium
CVSS3
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.4 Medium
AI Score
Confidence
High
3.3 Low
CVSS2
Access Vector
ADJACENT_NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:A/AC:L/Au:N/C:N/I:N/A:P
0.001 Low
EPSS
Percentile
34.9%
In ISC DHCP 4.4.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option’s refcount field. However, there is not a corresponding call to option_dereference() to decrement the refcount field. The function add_option() is only used in server responses to lease query packets. Each lease query response calls this function for several options, so eventually, the reference counters could overflow and cause the server to abort.
CPE | Name | Operator | Version |
---|---|---|---|
debian_linux | eq | 10.0 | |
fedora | eq | 35 | |
fedora | eq | 36 | |
fedora | eq | 37 | |
dhcp | eq | 4.1-esv r12 | |
dhcp | eq | 4.1esv r11rc1 | |
dhcp | eq | 4.1esv r11b1 | |
dhcp | eq | 4.1esv r10b1 | |
dhcp | eq | 4.1-esv r10 | |
dhcp | eq | 4.1esv r12b1 |
kb.isc.org/docs/cve-2022-2928
lists.debian.org/debian-lts-announce/2022/10/msg00015.html
lists.fedoraproject.org/archives/list/[email protected]/message/2SARIK7KZ7MGQIWDRWZFAOSQSPXY4GOU/
lists.fedoraproject.org/archives/list/[email protected]/message/QQXYCIWUDILRCNBAIMVFCSGXBRKEPB4K/
lists.fedoraproject.org/archives/list/[email protected]/message/T6IBFH4MRRNJQVWEKILQ6I6CXWW766FX/
security.gentoo.org/glsa/202305-22
6.5 Medium
CVSS3
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.4 Medium
AI Score
Confidence
High
3.3 Low
CVSS2
Access Vector
ADJACENT_NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:A/AC:L/Au:N/C:N/I:N/A:P
0.001 Low
EPSS
Percentile
34.9%