低危 在文件访问前对链接解析不恰当（链接跟随）
CVE编号
CVE-2020-28407利用情况
暂无补丁情况
官方补丁披露时间
2020-11-14漏洞描述
A flaw was found in swtpm. This flaw allows an attacker to create a symbolic link with the name of the temporary file (TMP2-00.permall for TPM 2) and have this point to a valuable file, which will get overwritten by swtpm. The success of the attack depends on the attacker having access to the TPM's state directory (--tpmstate dir). The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.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://bugzilla.suse.com/show_bug.cgi?id=1198395 | |
| https://github.com/stefanberger/swtpm/releases/tag/v0.4.2 | |
| https://github.com/stefanberger/swtpm/releases/tag/v0.5.1 |
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 | swtpm_project | swtpm | * | Up to (excluding) 0.4.2 | |||||
| 运行在以下环境 | |||||||||
| 应用 | swtpm_project | swtpm | 0.5.0 | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_12 | swtpm | * | Up to (excluding) 0.7.1-1.3 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_sid | swtpm | * | Up to (excluding) 0.7.1-1.3 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_31 | swtpm-debugsource | * | Up to (excluding) 0.5.1-1.20201113git390f5bd.fc31 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_32 | swtpm-debugsource | * | Up to (excluding) 0.5.1-1.20201113git390f5bd.fc32 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_33 | swtpm-debugsource | * | Up to (excluding) 0.5.1-1.20201113git390f5bd.fc33 | |||||
- 攻击路径 远程
- 攻击复杂度 容易
- 权限要求 无需权限
- 影响范围 有限影响
- EXP成熟度 未验证
- 补丁情况 官方补丁
- 数据保密性 无影响
- 数据完整性 无影响
- 服务器危害 无影响
- 全网数量 N/A
| CWE-ID | 漏洞类型 |
| CWE-59 | 在文件访问前对链接解析不恰当（链接跟随） |
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