中危 isc dhcp 内存缓冲区边界内操作的限制不恰当
CVE编号
CVE-2021-25217利用情况
暂无补丁情况
没有补丁披露时间
2021-05-27漏洞描述
In ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16, ISC DHCP 4.4.0 -> 4.4.2 (Other branches of ISC DHCP (i.e., releases in the 4.0.x series or lower and releases in the 4.3.x series) are beyond their End-of-Life (EOL) and no longer supported by ISC. From inspection it is clear that the defect is also present in releases from those series, but they have not been officially tested for the vulnerability), The outcome of encountering the defect while reading a lease that will trigger it varies, according to: the component being affected (i.e., dhclient or dhcpd) whether the package was built as a 32-bit or 64-bit binary whether the compiler flag -fstack-protection-strong was used when compiling In dhclient, ISC has not successfully reproduced the error on a 64-bit system. However, on a 32-bit system it is possible to cause dhclient to crash when reading an improper lease, which could cause network connectivity problems for an affected system due to the absence of a running DHCP client process. In dhcpd, when run in DHCPv4 or DHCPv6 mode: if the dhcpd server binary was built for a 32-bit architecture AND the -fstack-protection-strong flag was specified to the compiler, dhcpd may exit while parsing a lease file containing an objectionable lease, resulting in lack of service to clients. Additionally, the offending lease and the lease immediately following it in the lease database may be improperly deleted. if the dhcpd server binary was built for a 64-bit architecture OR if the -fstack-protection-strong compiler flag was NOT specified, the crash will not occur, but it is possible for the offending lease and the lease which immediately followed it to be improperly deleted.解决建议
建议您更新当前系统或软件至最新版，完成漏洞的修复。受影响软件情况
| # | 类型 | 厂商 | 产品 | 版本 | 影响面 | ||||
| 1 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 运行在以下环境 | |||||||||
| 应用 | isc | dhcp | * | From (including) 4.4.0 | Up to (including) 4.4.2 | ||||
| 运行在以下环境 | |||||||||
| 应用 | isc | dhcp | 4.1-esv | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | alibaba_cloud_linux_2.1903 | dhclient | * | Up to (excluding) 4.2.5-83.1.al7.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.12 | dhcp | * | Up to (excluding) 4.4.2_p1-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.13 | dhcp | * | Up to (excluding) 4.4.2_p1-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.14 | dhcp | * | Up to (excluding) 4.4.2_p1-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.15 | dhcp | * | Up to (excluding) 4.4.2_p1-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.16 | dhcp | * | Up to (excluding) 4.4.2_p1-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.17 | dhcp | * | Up to (excluding) 4.4.2_p1-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.18 | dhcp | * | Up to (excluding) 4.4.2_p1-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_edge | dhcp | * | Up to (excluding) 4.4.2_p1-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | amazon_2 | dhcp | * | Up to (excluding) 4.2.5-77.amzn2.1.3 | |||||
| 运行在以下环境 | |||||||||
| 系统 | amazon_AMI | dhcp | * | Up to (excluding) 4.1.1-53.P1.29.amzn1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | anolis_os_8 | dhcp-client | * | Up to (excluding) 4.3.6-44.0.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | anolis_os_8.2 | dhcp-relay | * | Up to (excluding) 4.3.6-40.0.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | centos_7 | dhclient | * | Up to (excluding) 4.2.5-83.el7.centos.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | centos_8 | dhcp-server | * | Up to (excluding) 4.3.6-44.el8_4.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_10 | isc-dhcp | * | Up to (excluding) 4.4.1-2+deb10u1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_11 | isc-dhcp | * | Up to (excluding) 4.4.1-2.3 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_12 | isc-dhcp | * | Up to (excluding) 4.4.1-2.3 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_9 | isc-dhcp | * | Up to (excluding) 4.3.5-3+deb9u2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_sid | isc-dhcp | * | Up to (excluding) 4.4.1-2.3 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_33 | dhcp-libs-static | * | Up to (excluding) 4.4.2-9.b1.fc33 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_34 | dhcp-libs-static | * | Up to (excluding) 4.4.2-11.b1.fc34 | |||||
| 运行在以下环境 | |||||||||
| 系统 | kylinos_aarch64_V10 | dhcp | * | Up to (excluding) 4.2.5-83.el7_9.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | kylinos_aarch64_V10SP2 | dhcp | * | Up to (excluding) 4.4.2-5.ky10 | |||||
| 运行在以下环境 | |||||||||
| 系统 | kylinos_x86_64_V10 | dhcp | * | Up to (excluding) 4.2.5-83.el7_9.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | kylinos_x86_64_V10SP2 | dhcp | * | Up to (excluding) 4.4.2-5.ky10 | |||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_15.2 | dhcp-devel | * | Up to (excluding) 4.3.6.P1-lp152.8.6.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_15.3 | dhcp-devel | * | Up to (excluding) 4.3.6.P1-6.11.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | oracle_6 | oraclelinux-release | * | Up to (excluding) 4.1.1-63.P1.0.2.el6_10 | |||||
| 运行在以下环境 | |||||||||
| 系统 | oracle_7 | oraclelinux-release | * | Up to (excluding) 4.2.5-83.0.1.el7_9.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | oracle_8 | oraclelinux-release | * | Up to (excluding) 4.3.6-44.el8_4.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | redhat_6 | dhclient | * | Up to (excluding) 12:4.1.1-64.P1.el6_10 | |||||
| 运行在以下环境 | |||||||||
| 系统 | redhat_7 | dhclient | * | Up to (excluding) 4.2.5-83.el7_9.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | redhat_8 | dhcp-server | * | Up to (excluding) 4.3.6-44.el8_4.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | suse_12_SP5 | dhcp | * | Up to (excluding) 4.3.3-10.22.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_18.04 | isc-dhcp | * | Up to (excluding) 4.3.5-3ubuntu7.3 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_18.04.5_lts | isc-dhcp | * | Up to (excluding) 4.3.5-3ubuntu7.3 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_20.04 | isc-dhcp | * | Up to (excluding) 4.4.1-2.1ubuntu5.20.04.2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_21.04 | isc-dhcp | * | Up to (excluding) 4.4.1-2.2ubuntu6.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_21.10 | isc-dhcp | * | Up to (excluding) 4.4.1-2.2ubuntu7 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_22.04 | isc-dhcp | * | Up to (excluding) 4.4.1-2.2ubuntu7 | |||||
- 攻击路径 本地
- 攻击复杂度 容易
- 权限要求 无需权限
- 影响范围 越权影响
- EXP成熟度 N/A
- 补丁情况 没有补丁
- 数据保密性 无影响
- 数据完整性 无影响
- 服务器危害 服务器失陷
- 全网数量 N/A
| CWE-ID | 漏洞类型 |
| CWE-119 | 内存缓冲区边界内操作的限制不恰当 |
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