Microsoft security update for CVE-2022-2928
🔗 CVE IDs covered (1)
📋 Microsoft's advisory
EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-2928. This page also shows what EchelonGraph holds for CVE-2022-2928, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.
🎯 Affected products4
- azl3 dhcp 4.4.3-2 on Azure Linux 3.0
- azl3 dhcp 4.4.3.P1-1 on Azure Linux 3.0
- cbl2 dhcp 4.4.3-3 on CBL Mariner 2.0
- cm1 dhcp 4.4.2-3 on CBL Mariner 1.0
✅ Updates Microsoft lists: 3 updates
3 rows: one per KB article or update, update type and fixed build. Their details are on Microsoft's advisory.
| KB article | Update | Fixed build |
|---|---|---|
| — | Security Update | 4.4.2-3 |
| — | Security Update | 4.4.3-3 |
| — | Security Update | 4.4.3.P1-1 |
🧭 EchelonGraph on CVE-2022-2928
- EchelonGraph score
- 7.5 HIGH
- CISA KEV
- Not listed
- Fix status
- A fix is available — apply it.
Description from the CVE record (CVE.org), as published by its numbering authority
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.
Published by Internet Systems Consortium (ISC), the CVE Numbering Authority that assigned CVE-2022-2928, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).