Core Rule Set: ls -la passes in q on a gitea user's or organisation's page (closes #349)

On a path of one segment, q now skips 932250 too, unless the path ends
in .php, as /index.php does. The Forgejo recording gains the two
searches for ls -la, made from the recorded searches for python3.

Model: opus-5-5

SPEC.md

@@ -829,9 +829,9 @@ The changes hold in front of every app, and no setting undoes them:
         - packages, on its pages and in its API.
 
         A user's or an organisation's page is any path of one segment, so on
-        every such path, on any app, `q` skips 930120, 932120 and 932260, for
-        example on `/search`. It keeps 932250 there, so `ls -la` is refused on
-        those pages.
+        every such path, on any app, `q` skips these rules, for example on
+        `/search`. A path that ends in `.php`, such as `/index.php`, keeps
+        932250, so `ls -la` is refused there.
 
         Some of these searches also skip the rule for Java class names (944130),
         which refused `org.apache.commons.logging`.

internal/coreruleset/coreruleset_test.go

@@ -1063,6 +1063,41 @@ func TestGiteaAttacksAreRefused(t *testing.T) {
 	}
 }
 
+func TestGiteaSearchOnAUsersOrAnOrganisationsPageLetsLsThrough(t *testing.T) {
+	t.Parallel()
+
+	crs := atDefaults(t)
+
+	// The searches of a user's and of an organisation's repositories.
+	for _, target := range []string{
+		"/alice?tab=repositories&q=ls%20-la",
+		"/acme?q=ls%20-la&sort=recentupdate",
+		"/jane.doe?tab=repositories&q=ls%20-la",
+	} {
+		wantResult(t, crs, get(target), coreruleset.Result{})
+	}
+
+	// A path that ends in .php, another field, and a path of two segments
+	// keep 932250.
+	for _, target := range []string{
+		"/index.php?q=ls%20-la",
+		"/INDEX.PHP?q=ls%20-la",
+		"/index%2Ephp?q=ls%20-la",
+		"/alice?tab=ls%20-la",
+		"/alice/tools?q=ls%20-la",
+	} {
+		wantResult(t, crs, get(target), matched(932250))
+	}
+
+	// A command after a ";" is still refused on those pages.
+	const threshold = 5 // SWW_WAF_ANOMALY_THRESHOLD's default
+
+	target := "/alice?tab=repositories&q=" + commandInjection
+	if got := inspect(t, crs, get(target)); got.Score < threshold {
+		t.Errorf("%s let through: %+v", target, got)
+	}
+}
+
 // WordPress's paths: signing in, posting a comment, admin-ajax.php, and the
 // REST API routes of a post and of the tags.
 const (

internal/coreruleset/gitea.conf

@@ -135,8 +135,8 @@ SecRule REQUEST_FILENAME "@rx ^/(?:repo/search|\
     ctl:ruleRemoveTargetById=932260;ARGS:q"
 
 # The repositories on a user's or an organisation's page are searched with q
-# too. Their path has one segment, as other apps' pages such as /index.php do,
-# so q keeps 932250 there and skips only these rules:
+# too. Their path has one segment, so q skips these rules on every path of one
+# segment, other apps' pages such as /index.php included:
 #   930120: .profile
 #   932120: powershell-scripts
 #   932260: python3-app
@@ -146,6 +146,13 @@ SecRule REQUEST_FILENAME "@rx ^/[^/]+$" \
     ctl:ruleRemoveTargetById=932120;ARGS:q,\
     ctl:ruleRemoveTargetById=932260;ARGS:q"
 
+# On those pages q skips 932250 too, which refused ls -la. A path that ends in
+# .php, such as /index.php, keeps it.
+SecRule REQUEST_FILENAME "@rx ^/[^/]+$" \
+    "id:900605,phase:1,pass,nolog,chain"
+    SecRule REQUEST_FILENAME "!@rx \.php$" \
+        "t:lowercase,ctl:ruleRemoveTargetById=932250;ARGS:q"
+
 # These requests name a file in the path, which skips these rules there:
 #   920500: notes.txt~
 #   934100: process.env.d.ts

internal/coreruleset/testdata/forgejo-requests.txt

@@ -4,7 +4,9 @@
 # the API and the generic package registry, and by crane on the container
 # registry. Each line is one request as JSON. Names, addresses and passwords
 # are invented. The browser's User-Agent is an ordinary Chrome's. A body or a
-# multipart part that is not text is written as base64.
+# multipart part that is not text is written as base64. The searches for ls -la
+# on a user's and an organisation's page are the recorded searches for python3
+# there, with q changed.
 {"method": "GET", "target": "/", "headers": ["Host: example.com", "Connection: keep-alive", "Upgrade-Insecure-Requests: 1", "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/156.0.8078.4 Safari/537.36", "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/jxl,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7", "Accept-Encoding: gzip, deflate"], "body": ""}
 {"method": "GET", "target": "/assets/js/webcomponents.js?v=17.0.1~gitea-1.22.0", "headers": ["Host: example.com", "Connection: keep-alive", "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/156.0.8078.4 Safari/537.36", "Accept: */*", "Referer: http://example.com/", "Accept-Encoding: gzip, deflate"], "body": ""}
 {"method": "GET", "target": "/assets/css/index.css?v=17.0.1~gitea-1.22.0", "headers": ["Host: example.com", "Connection: keep-alive", "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/156.0.8078.4 Safari/537.36", "Accept: text/css,*/*;q=0.1", "Referer: http://example.com/", "Accept-Encoding: gzip, deflate"], "body": ""}
@@ -102,6 +104,7 @@
 {"method": "GET", "target": "/explore/users?q=python3", "headers": ["Host: example.com", "Connection: keep-alive", "Upgrade-Insecure-Requests: 1", "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/156.0.8078.4 Safari/537.36", "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/jxl,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7", "Accept-Encoding: gzip, deflate", "Cookie: session=d65379616ffd0971; lang=en-US"], "body": ""}
 {"method": "GET", "target": "/explore/organizations?q=python3", "headers": ["Host: example.com", "Connection: keep-alive", "Upgrade-Insecure-Requests: 1", "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/156.0.8078.4 Safari/537.36", "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/jxl,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7", "Accept-Encoding: gzip, deflate", "Cookie: session=d65379616ffd0971; lang=en-US"], "body": ""}
 {"method": "GET", "target": "/alice?tab=repositories&q=python3", "headers": ["Host: example.com", "Connection: keep-alive", "Upgrade-Insecure-Requests: 1", "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/156.0.8078.4 Safari/537.36", "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/jxl,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7", "Accept-Encoding: gzip, deflate", "Cookie: session=d65379616ffd0971; lang=en-US"], "body": ""}
+{"method": "GET", "target": "/alice?tab=repositories&q=ls%20-la", "headers": ["Host: example.com", "Connection: keep-alive", "Upgrade-Insecure-Requests: 1", "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/156.0.8078.4 Safari/537.36", "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/jxl,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7", "Accept-Encoding: gzip, deflate", "Cookie: session=d65379616ffd0971; lang=en-US"], "body": ""}
 {"method": "GET", "target": "/avatars/53bce4f1dfa0fe8e7ca126f91b35d3a6?size=64", "headers": ["Host: example.com", "Connection: keep-alive", "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/156.0.8078.4 Safari/537.36", "Accept: image/jxl,image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8", "Referer: http://example.com/alice?tab=repositories&q=python3", "Accept-Encoding: gzip, deflate", "Cookie: session=d65379616ffd0971; lang=en-US"], "body": ""}
 {"method": "GET", "target": "/alice/tools/commits/branch/main/search?q=python3&all=true", "headers": ["Host: example.com", "Connection: keep-alive", "Upgrade-Insecure-Requests: 1", "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/156.0.8078.4 Safari/537.36", "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/jxl,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7", "Accept-Encoding: gzip, deflate", "Cookie: session=d65379616ffd0971; lang=en-US"], "body": ""}
 {"method": "GET", "target": "/alice/-/packages?q=python3", "headers": ["Host: example.com", "Connection: keep-alive", "Upgrade-Insecure-Requests: 1", "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/156.0.8078.4 Safari/537.36", "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/jxl,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7", "Accept-Encoding: gzip, deflate", "Cookie: session=d65379616ffd0971; lang=en-US"], "body": ""}
@@ -468,3 +471,4 @@
 {"method": "GET", "target": "/repo-avatars/f9e66d43eb4888aac5d9d93745661631a09b4c73969226a3e89b2911ece215ba", "headers": ["Host: example.com", "Connection: keep-alive", "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/156.0.8078.4 Safari/537.36", "Accept: image/jxl,image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8", "Referer: http://example.com/alice", "Accept-Encoding: gzip, deflate", "Cookie: session=00a162ad65e95a87; lang=en-US"], "body": ""}
 {"method": "GET", "target": "/avatars/53bce4f1dfa0fe8e7ca126f91b35d3a6?size=64", "headers": ["Host: example.com", "Connection: keep-alive", "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/156.0.8078.4 Safari/537.36", "Accept: image/jxl,image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8", "Referer: http://example.com/alice", "Accept-Encoding: gzip, deflate", "Cookie: session=00a162ad65e95a87; lang=en-US"], "body": ""}
 {"method": "GET", "target": "/acme?q=python3&sort=recentupdate", "headers": ["Host: example.com", "Connection: keep-alive", "Upgrade-Insecure-Requests: 1", "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/156.0.8078.4 Safari/537.36", "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/jxl,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7", "Referer: http://example.com/acme", "Accept-Encoding: gzip, deflate", "Cookie: session=00a162ad65e95a87; lang=en-US"], "body": ""}
+{"method": "GET", "target": "/acme?q=ls%20-la&sort=recentupdate", "headers": ["Host: example.com", "Connection: keep-alive", "Upgrade-Insecure-Requests: 1", "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/156.0.8078.4 Safari/537.36", "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/jxl,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7", "Referer: http://example.com/acme", "Accept-Encoding: gzip, deflate", "Cookie: session=00a162ad65e95a87; lang=en-US"], "body": ""}