CVE编号
CVE-2021-43837利用情况
暂无补丁情况
N/A披露时间
2021-12-17漏洞描述
vault-cli is a configurable command-line interface tool (and python library) to interact with Hashicorp Vault. In versions before 3.0.0 vault-cli features the ability for rendering templated values. When a secret starts with the prefix `!template!`, vault-cli interprets the rest of the contents of the secret as a Jinja2 template. Jinja2 is a powerful templating engine and is not designed to safely render arbitrary templates. An attacker controlling a jinja2 template rendered on a machine can trigger arbitrary code, making this a Remote Code Execution (RCE) risk. If the content of the vault can be completely trusted, then this is not a problem. Otherwise, if your threat model includes cases where an attacker can manipulate a secret value read from the vault using vault-cli, then this vulnerability may impact you. In 3.0.0, the code related to interpreting vault templated secrets has been removed entirely. Users are advised to upgrade as soon as possible. For users unable to upgrade a workaround does exist. Using the environment variable `VAULT_CLI_RENDER=false` or the flag `--no-render` (placed between `vault-cli` and the subcommand, e.g. `vault-cli --no-render get-all`) or adding `render: false` to the vault-cli configuration yaml file disables rendering and removes the vulnerability. Using the python library, you can use: `vault_cli.get_client(render=False)` when creating your client to get a client that will not render templated secrets and thus operates securely.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 |
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|---|---|
| https://github.com/peopledoc/vault-cli/commit/3ba3955887fd6b7d4d646c8b260f21c... | |
| https://github.com/peopledoc/vault-cli/security/advisories/GHSA-q34h-97wf-8r8j | |
| https://podalirius.net/en/publications/grehack-2021-optimizing-ssti-payloads-... |
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 | ukg | vault-cli | * |
From (including) 0.7.0 |
Up to (excluding) 3.0.0 |
||||
- 攻击路径 相邻
- 攻击复杂度 低
- 权限要求 高
- 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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