Signature Detail
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Short Name |
SHELLCODE:X86:X90-NOOP-HTTP-HDR |
|---|---|
Severity |
Critical |
Recommended |
No |
Recommended Action |
Drop |
Category |
SHELLCODE |
Keywords |
x86 Intel Architecture Instruction Set NOOP Slide In HTTP Header |
Release Date |
2004/04/28 |
Update Number |
1213 |
Supported Platforms |
di-5.3+, idp-4.0+, isg-3.0+, j-series-9.5+, mx-11.4+, srx-12.1+, srx-branch-12.1+, vmx-17.4+, vsrx-12.1+, vsrx3bsd-18.2+ |
SHELLCODE: x86 Intel Architecture Instruction Set NOOP Slide In HTTP Header
This signature detects attempts to exploit a known vulnerability against Web servers on Intel x86 platforms. Attackers can use the "No-Op Slide" attack to pad the stack with "No Operation" x86 CPU instructions and overwrite the return address.
Extended Description
Large amounts of values that represent No-Ops in a data stream may represent a buffer overflow attempt.
References