iRule Detector
Summary: F-Secure researcher Christoffer Jerkeby found a remote code execution flaw in some implementations of F5 Networks' BigIP load balancer, in its iRule feature, which is written in a fork of Tcl-8.4. Some iRules parse data from incoming web requests and incorrectly interpret that data as Tcl commands, letting an attacker inject and execute arbitrary commands in the context of the target script.
Key Takeaway: The vulnerable component sits on the load balancer itself, so an injected command runs in the security context of the traffic-management script that fronts your applications. F-Secure contributed two open source tools, TestTcl and Tclscan, to help identify iRules exposed to this command injection class.
Read the original at PortSwigger Research ↗
- Topics
- Vulnerabilities & Patching
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