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CVE PROGRAM SOURCE RECORD6.5 Medium

CVE-2022-2928

An option refcount overflow exists in dhcpd

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Status
Published
Published
Updated
Assigning organization
isc

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

ISC ISC DHCP

  • 4.4.0 through versions before 4.4.3-P1affected
  • 4.1 ESV 4.1-ESV-R1 through versions before 4.1-ESV-R16-P1affected

References