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Prevent panic on fuzzer provided string (#14405)

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* Prevent panic on fuzzer provided string

The fuzzer has found that providing a <body> tag with an attribute to
PostProcess causes a panic. This PR removes any rendered html or body
tags from the output.

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Placate lint

* placate lint again

Signed-off-by: Andrew Thornton <art27@cantab.net>

* minor cleanup

Signed-off-by: Andrew Thornton <art27@cantab.net>
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zeripath 2021-01-20 15:10:50 +00:00 • committed by GitHub
parent b708968694
commit 172229966c
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2 changed files with 53 additions and 10 deletions
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25
modules/markup/html_test.go
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@ -383,3 +383,28 @@ func TestRender_ShortLinks(t *testing.T) {
`<p><a href="https://example.org" rel="nofollow">[[foobar]]</a></p>`,
`<p><a href="https://example.org" rel="nofollow">[[foobar]]</a></p>`)
}
func Test_ParseClusterFuzz(t *testing.T) {
setting.AppURL = AppURL
setting.AppSubURL = AppSubURL
var localMetas = map[string]string{
"user": "go-gitea",
"repo": "gitea",
}
data := "<A><maTH><tr><MN><bodY ÿ><temPlate></template><tH><tr></A><tH><d<bodY "
val, err := PostProcess([]byte(data), "https://example.com", localMetas, false)
assert.NoError(t, err)
assert.NotContains(t, string(val), "<html")
data = "<!DOCTYPE html>\n<A><maTH><tr><MN><bodY ÿ><temPlate></template><tH><tr></A><tH><d<bodY "
val, err = PostProcess([]byte(data), "https://example.com", localMetas, false)
assert.NoError(t, err)
assert.NotContains(t, string(val), "<html")
}