XSS Reflected and XXE Vulnerability Changes #432

Prince-1110 · 2023-02-15T17:45:49Z

No description provided.

XSS reflected validations update

removing directory

XSS Reflected Fix

XSS Reflected Message Update

Prince-1110 · 2023-02-23T17:45:10Z

Hi @hexxdump Please take a look at the changes.

hexxdump · 2023-02-23T18:53:15Z

Hi @hexxdump Please take a look at the changes.

@Prince-1110 ,
@preetkaran20 can point you to the right contact.

preetkaran20 · 2023-02-26T02:40:38Z

Hi @hexxdump Please take a look at the changes.

@Prince-1110 , @preetkaran20 can point you to the right contact.

@hexxdump yeah sure. @Prince-1110 thanks for the PR, give me a day and i will review it.

preetkaran20 · 2023-02-27T00:54:47Z

src/main/java/org/sasanlabs/service/vulnerability/xss/reflected/XSSInImgTagAttribute.java

@@ -201,4 +201,63 @@ public ResponseEntity<String> getVulnerablePayloadLevelSecure(
            return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
        }
    }
+
+     // Escape all the input which provides eval expression in a payload


the below method is also escaping other things apart from eval. isn't it?

preetkaran20 · 2023-02-27T00:55:43Z

src/main/java/org/sasanlabs/service/vulnerability/xss/reflected/XSSInImgTagAttribute.java

+
+        String vulnerablePayloadWithPlaceHolder = "<img src=%s width=\"400\" height=\"300\"/>";
+
+        String payload =


what is the difference between level 8 and level 9?

preetkaran20 · 2023-02-27T00:56:25Z

src/main/java/org/sasanlabs/service/vulnerability/xss/reflected/XSSInImgTagAttribute.java

+            vulnerabilityExposed = VulnerabilityType.REFLECTED_XSS,
+            description =
+                    "XSS_HTML_ESCAPE_ON_DIRECT_INPUT_AND_REMOVAL_OF_ONLOAD_FUNCTIONS_WITH_PARENTHESIS_SRC_ATTRIBUTE_IMG_TAG")
+    @VulnerableAppRequestMapping(value = LevelConstants.LEVEL_10, htmlTemplate = "LEVEL_1/XSS")


this one is also same as level 9. am i missing something?

preetkaran20 · 2023-02-27T01:03:59Z

src/main/java/org/sasanlabs/service/vulnerability/xss/reflected/XSSWithHtmlTagInjection.java

+            @RequestParam Map<String, String> queryParams) {
+        String vulnerablePayloadWithPlaceHolder = "<div>%s<div>";
+        StringBuilder payload = new StringBuilder();
+        Pattern pattern = Pattern.compile("eval\\((.*?)\\)");


can you please add an extra blacklist defence to level 3 here?

or make it as level 2 as first level has not defence and level 2 has eval based defence and then move other levels to next levels like level3 becomes level 4 and so on.

preetkaran20 · 2023-02-27T01:07:20Z

src/main/java/org/sasanlabs/service/vulnerability/xss/reflected/XSSWithHtmlTagInjection.java

+            vulnerabilityExposed = VulnerabilityType.REFLECTED_XSS,
+            description =
+                    "XSS_DIRECT_INPUT_DIV_TAG_AFTER_REMOVING_VALUES_CONTAINING_ONLOAD_EXPRESSION")
+    @VulnerableAppRequestMapping(value = LevelConstants.LEVEL_10, htmlTemplate = "LEVEL_1/XSS")


so we can reformat, level 8 method which you created can be called level 2, level 9 can be called level 3, level 10 can be called level 4 and then currently level 2 and level 3 can be called level 5 and level 6 respectively.

preetkaran20 · 2023-02-27T01:07:50Z

src/main/java/org/sasanlabs/service/vulnerability/xss/reflected/XSSWithHtmlTagInjection.java

+        return new ResponseEntity<String>(payload.toString(), HttpStatus.OK);
+    }
+
+    // Just adding User defined input(Untrusted Data) into div tag if contains


please add the possible payloads to break the levels.

preetkaran20 · 2023-02-27T01:08:11Z

src/main/java/org/sasanlabs/service/vulnerability/xss/reflected/XSSWithHtmlTagInjection.java

+
+    @AttackVector(
+            vulnerabilityExposed = VulnerabilityType.REFLECTED_XSS,
+            description = "XSS_DIRECT_INPUT_DIV_TAG_AFTER_REMOVING_VALUES_CONTAINING_PARANOID")


better to add more description than just paranoid values.

preetkaran20 · 2023-02-27T01:09:03Z

src/main/resources/i18n/messages_en_US.properties

@@ -49,6 +52,9 @@ XSS_DIRECT_INPUT_DIV_TAG=Html Tag is directly injected into div tag.
 XSS_DIRECT_INPUT_DIV_TAG=Url Parameters are added directly into div tag.
 XSS_DIRECT_INPUT_DIV_TAG_AFTER_REMOVING_VALUES_CONTAINING_ANCHOR_SCRIPT_AND_IMG_TAG=Url Parameters are added directly into the div tag if they are not having Script/Image and Anchor tag.
 XSS_DIRECT_INPUT_DIV_TAG_AFTER_REMOVING_VALUES_CONTAINING_ANCHOR_SCRIPT_IMG_TAG_AND_ALERT_KEYWORD=Url Parameters are added directly into the div tag if they are not having Script/Image/Anchor tag and Javascript and Alert keywords.
+XSS_DIRECT_INPUT_DIV_TAG_AFTER_REMOVING_VALUES_CONTAINING_EVAL_EXPRESSION=Url Parameters are added into the div tag if they are not having eval expression.
+XSS_DIRECT_INPUT_DIV_TAG_AFTER_REMOVING_VALUES_CONTAINING_PARANOID=Url Parameter are added into the div tag if they are not having paranoid structure inside the url.


I think it is better to specify what is paranoid structure.

preetkaran20 · 2023-02-27T01:09:29Z

src/main/resources/i18n/messages_en_US.properties

@@ -49,6 +52,9 @@ XSS_DIRECT_INPUT_DIV_TAG=Html Tag is directly injected into div tag.
 XSS_DIRECT_INPUT_DIV_TAG=Url Parameters are added directly into div tag.
 XSS_DIRECT_INPUT_DIV_TAG_AFTER_REMOVING_VALUES_CONTAINING_ANCHOR_SCRIPT_AND_IMG_TAG=Url Parameters are added directly into the div tag if they are not having Script/Image and Anchor tag.
 XSS_DIRECT_INPUT_DIV_TAG_AFTER_REMOVING_VALUES_CONTAINING_ANCHOR_SCRIPT_IMG_TAG_AND_ALERT_KEYWORD=Url Parameters are added directly into the div tag if they are not having Script/Image/Anchor tag and Javascript and Alert keywords.
+XSS_DIRECT_INPUT_DIV_TAG_AFTER_REMOVING_VALUES_CONTAINING_EVAL_EXPRESSION=Url Parameters are added into the div tag if they are not having eval expression.
+XSS_DIRECT_INPUT_DIV_TAG_AFTER_REMOVING_VALUES_CONTAINING_PARANOID=Url Parameter are added into the div tag if they are not having paranoid structure inside the url.
+XSS_DIRECT_INPUT_DIV_TAG_AFTER_REMOVING_VALUES_CONTAINING_ONLOAD_EXPRESSION=Url Parameters are added directly into the div tag if the input url not having eval expressions.


Suggested change

XSS_DIRECT_INPUT_DIV_TAG_AFTER_REMOVING_VALUES_CONTAINING_ONLOAD_EXPRESSION=Url Parameters are added directly into the div tag if the input url not having eval expressions.

XSS_DIRECT_INPUT_DIV_TAG_AFTER_REMOVING_VALUES_CONTAINING_ONLOAD_EXPRESSION=Url Parameters are added directly into the div tag if the input url not having onload expressions.

preetkaran20 · 2023-02-27T01:11:35Z

src/main/java/org/sasanlabs/service/vulnerability/xss/reflected/XXEVulnerability.java

+ *
+ * @author KSASAN [email protected]
+ */
+@VulnerableAppRestController(descriptionLabel = "XXE_VULNERABILITY", value = "XXEVulnerability")


I think this file was already existing. can you please check?

preetkaran20 · 2023-02-27T01:18:04Z

src/main/java/org/sasanlabs/service/vulnerability/xss/reflected/XXEVulnerability.java

+            InputStream in = request.getInputStream();
+            // disabling external Entities and parameter Entities
+            SAXParserFactory spf = SAXParserFactory.newInstance();
+            spf.setFeature("http://javax.xml.XMLConstants/feature/secure-processing", true);


I was checking this flag and seems like by default it is enabled for SAXparser.
https://docs.oracle.com/en/java/javase/13/security/java-api-xml-processing-jaxp-security-guide.html#GUID-88B04BE2-35EF-4F61-B4FA-57A0E9102342.

Also, don't we need other flags to make this level secure?

preetkaran20 · 2023-02-27T01:20:30Z

src/main/java/org/sasanlabs/service/vulnerability/xss/reflected/XXEVulnerability.java

+            InputStream in = request.getInputStream();
+            // disabling external Entities and parameter Entities
+            SAXParserFactory spf = SAXParserFactory.newInstance();
+            spf.setFeature("http://javax.xml.XMLConstants/property/accessExternalStylesheet", "");


without below lines

spf.setFeature("http://javax.xml.XMLConstants/property/accessExternalSchema", ""); spf.setFeature("http://javax.xml.XMLConstants/property/accessExternalDTD", "");

will this be secure implementation?

preetkaran20

Thanks for the PR. Added few comments to the PR and also please fix the PR build as it is also failing.

Prince-1110 added 7 commits February 5, 2023 00:30

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XSS Reflected Message Update

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XSS Reflected and XXE Vulnerability Changes #432

XSS Reflected and XXE Vulnerability Changes #432

Prince-1110 commented Feb 15, 2023

Prince-1110 commented Feb 23, 2023

hexxdump commented Feb 23, 2023

preetkaran20 commented Feb 26, 2023

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preetkaran20 left a comment •

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		String vulnerablePayloadWithPlaceHolder = "<img src=%s width=\"400\" height=\"300\"/>";

		String payload =

	XSS_DIRECT_INPUT_DIV_TAG_AFTER_REMOVING_VALUES_CONTAINING_ONLOAD_EXPRESSION=Url Parameters are added directly into the div tag if the input url not having eval expressions.
	XSS_DIRECT_INPUT_DIV_TAG_AFTER_REMOVING_VALUES_CONTAINING_ONLOAD_EXPRESSION=Url Parameters are added directly into the div tag if the input url not having onload expressions.

XSS Reflected and XXE Vulnerability Changes #432

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XSS Reflected and XXE Vulnerability Changes #432

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Prince-1110 commented Feb 15, 2023

Prince-1110 commented Feb 23, 2023

hexxdump commented Feb 23, 2023

preetkaran20 commented Feb 26, 2023

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