CVE编号
CVE-2021-42114利用情况
暂无补丁情况
N/A披露时间
2021-11-16漏洞描述
Modern DRAM devices (PC-DDR4, LPDDR4X) are affected by a vulnerability in their internal Target Row Refresh (TRR) mitigation against Rowhammer attacks. Novel non-uniform Rowhammer access patterns, consisting of aggressors with different frequencies, phases, and amplitudes allow triggering bit flips on affected memory modules using our Blacksmith fuzzer. The patterns generated by Blacksmith were able to trigger bitflips on all 40 PC-DDR4 DRAM devices in our test pool, which cover the three major DRAM manufacturers: Samsung, SK Hynix, and Micron. This means that, even when chips advertised as Rowhammer-free are used, attackers may still be able to exploit Rowhammer. For example, this enables privilege-escalation attacks against the kernel or binaries such as the sudo binary, and also triggering bit flips in RSA-2048 keys (e.g., SSH keys) to gain cross-tenant virtual-machine access. We can confirm that DRAM devices acquired in July 2020 with DRAM chips from all three major DRAM vendors (Samsung, SK Hynix, Micron) are affected by this vulnerability. For more details, please refer to our publication.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。
参考链接 |
|
|---|---|
| https://comsec.ethz.ch/research/dram/blacksmith/ | |
| https://comsec.ethz.ch/wp-content/files/blacksmith_sp22.pdf | |
| https://github.com/comsec-group/blacksmith |
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 | |||||||||
| 系统 | micron | ddr4_sdram_firmware | - | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | micron | lddr4_firmware | - | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | samsung | ddr4_sdram_firmware | - | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | samsung | lddr4_firmware | - | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | skhynix | ddr4_sdram_firmware | - | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | skhynix | lddr4_firmware | - | - | |||||
| 运行在以下环境 | |||||||||
| 硬件 | micron | ddr4_sdram | - | - | |||||
| 运行在以下环境 | |||||||||
| 硬件 | micron | lddr4 | - | - | |||||
| 运行在以下环境 | |||||||||
| 硬件 | samsung | ddr4_sdram | - | - | |||||
| 运行在以下环境 | |||||||||
| 硬件 | samsung | lddr4 | - | - | |||||
| 运行在以下环境 | |||||||||
| 硬件 | skhynix | ddr4_sdram | - | - | |||||
| 运行在以下环境 | |||||||||
| 硬件 | skhynix | lddr4 | - | - | |||||
- 攻击路径 网络
- 攻击复杂度 低
- 权限要求 无
- 影响范围 已更改
- 用户交互 无
- 可用性 高
- 保密性 高
- 完整性 高
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