Puppet 不正确的输入验证漏洞 (Improper Input Validation vulnerability)

攻击者可以利用此漏洞在 Puppet 服务器上执行任意代码，从而完全控制服务器。这可能导致敏感数据泄露、系统被破坏，甚至整个网络被攻陷。由于 Puppet 通常用于自动化配置管理，因此攻击者可以利用此漏洞修改系统配置，安装恶意软件，或进行横向移动攻击，影响整个基础设施。该漏洞的潜在影响范围非常广泛，类似于其他 RCE 漏洞，可能导致严重的业务中断和数据损失。

Organizations heavily reliant on Puppet for configuration management are particularly at risk. Environments with legacy Puppet deployments running older, unsupported versions are also vulnerable. Shared hosting environments where Puppet agents are managed centrally pose a significant risk, as a compromise of the Puppet master could affect multiple systems.

• ruby: Monitor Ruby processes running Puppet for unusual network connections or code execution patterns.

Get-Process | Where-Object {$_.ProcessName -like '*puppet*'} | Select-Object Name, Id, CPU, WorkingSet

• linux: Examine Puppet agent and master logs (/var/log/puppet/puppet.log) for errors related to attribute serialization or unexpected code execution.

journalctl -u puppet -f | grep -i "error" -i "serialization"

• generic web: Check Puppet agent configuration files for insecure attribute serialization practices. Review Puppet code for usage of serialized_attribute or similar constructs. • windows: Use Autoruns to check for unusual startup entries related to Puppet or Ruby that could indicate malicious code execution.

1. 2013-00-00Discovery

   discovery

2. 2017-10-24Disclosure

   disclosure

3. 2017-10-24Patch

   patch

1. 发布日期2017-10-24
2. 修改日期2024-11-29
3. EPSS 更新日期2026-04-02

最有效的缓解措施是立即升级 Puppet 至 2.7.21 或更高版本。如果无法立即升级，可以考虑以下临时缓解措施：限制对 Puppet 服务器的访问，仅允许授权用户访问。审查 Puppet 代码，查找可能利用序列化属性的恶意代码。实施严格的输入验证，防止攻击者注入恶意序列化数据。如果无法升级，请考虑回滚到受影响版本之前的版本，但这可能导致配置管理中断。 监控 Puppet 服务器的日志，查找可疑活动。