CVE-2022-2928
isc-dhcp - security update
6.5
MEDIUM
CVSS 3.1
EPSS 0.66%
描述
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.
如何修補 CVE-2022-2928
要修補 CVE-2022-2928,請將受影響套件升級到下列已修補版本。
- —升級至 4.4.3_p1-r0 或更新版本
CVE-2022-2928 正在被利用嗎?
低 — EPSS 為 0.7%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- >= 4.4.0, < 4.4.3_p1-r0
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |