Vulnerability Information
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Egress Policy Bypass via DNS over TCP in Harden-Runner (Community Tier)
Vulnerability Description
Harden-Runner is a CI/CD security agent that works like an EDR for GitHub Actions runners. In versions 2.15.1 and below, the Harden-Runner that allows bypass of the egress-policy: block network restriction using DNS queries over TCP. Egress policies are enforced on GitHub runners by filtering outbound connections at the network layer. When egress-policy: block is enabled with a restrictive allowed-endpoints list (e.g., only github.com:443), all non-compliant traffic should be denied. However, DNS queries over TCP, commonly used for large responses or fallback from UDP, are not adequately restricted. Tools like dig can explicitly initiate TCP-based DNS queries (+tcp flag) without being blocked. This vulnerability requires the attacker to already have code execution capabilities within the GitHub Actions workflow. The issue has been fixed in version 2.16.0.
CVSS Information
N/A
Vulnerability Type
保护机制失效
Vulnerability Title
Harden-Runner 安全漏洞
Vulnerability Description
Harden-Runner是StepSecurity开源的一个程序。为 GitHub 托管和自托管的跑步者提供网络出口过滤和运行时安全。 Harden-Runner 2.15.1及之前版本存在安全漏洞，该漏洞源于允许通过TCP进行DNS查询绕过出口策略网络限制。
CVSS Information
N/A
Vulnerability Type
N/A