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#381: threadFlowLocation "helper rules"
I created and merged a change draft for Yekaterina’s
Issue #381
, “Associate descriptor metadata with thread flow locations”:
https://github.com/oasis-tcs/sarif-spec/blob/master/Documents/ChangeDrafts/Accepted/sarif-v2.0-issue-381-helper-rules.docx
Please take a look. The entire change is pasted below.
Yekaterina and Michael : There is a subtle point that I want to discuss in a separate email. It might result in a small change to what I wrote.
Next is
Issue #387
: “anyOf externalPropertyFileReference location or guid is required”.
Thanks,
Larry
3.37.14 taxa property
A
threadFlowLocation
MAY contain a property named
taxa
whose value is an array of zero or more unique (§
3.7.3
)
reportingDescriptorReference
objects each of which specifies a category into which this
threadFlowLocation
falls.
NOTE: The motivation for this property is a tool that uses a set of rules to guide its analysis as it traces tainted data from a source to a sink. For example, at one location, the tool might apply a rule that says: “If the input to
String.Substr
is tainted, then so is the return value.” Such a tool can represent these “helper rules” as a custom taxonomy (§
3.19.3
), an array of
reportingDescriptor
objects (§
3.48
). Each member of
threadFlowLocation.taxa
can reference one of these helper rules.
EXAMPLE: This example illustrates the scenario in the above note.
{ # A run object (§
3.14
).
"tool": { # See §
3.14.6
.
"driver": {
"name": "TaintDetector",
"rules": [
{
"id": "TD0001",
"name": "UntrustedDataStoredInDatabase",
"shortDescription": {
"text": "Data from an untrusted source was stored in a database."
}
},
...
],
"taxa": [ # Custom taxonomy (§
3.19.3
) for helper rules.
{ # A reportingDescriptor object (§
3.48
).
"id": "HR0001",
"name": "SubstrPropogatesTaint",
"shortDescription": {
"text": "If the input to String.Substr is tainted,
so is the return value."
}
},
...
]
}
},
"results": [ # See §
3.14.22
.
{ # A result object §
3.26
.
"ruleId": "TD0001",
...
"codeFlows": [ # See §
3.26.18
.
{ # A codeFlow object (§
3.35
).
"threadFlows": [ # See §
3.35.3
.
{ # A threadFlow object (§
3.36
).
"locations": [ # See §
3.36.6
.
...
{ # A threadFlowLocation object.
"location": { # See §
3.37.3
.
"physicalLocation": {
"artifactLocation": {
"uri": "io/input.c",
"uriBaseId": "SRCROOT"
},
"region": {
"startLine": 32
}
}
},
"taxa": [
{ # A reportingDescriptorReference object (§
3.51
).
"id": "TD0001",
"index": 0
}
]
},
...
]
}
]
}
]
}
]
}
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