Vulnerabilities in pkg:maven/io.jooby/jooby-netty

PACKAGE
Advisory Identifier: GHSA-gv3v-92v6-m48j
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Advisory Summary

CVE-2020-7622 is a CRITICAL (CVSS 9.8) improper neutralization of crlf sequences vulnerability (CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')) affecting Jooby netty libraries in the Maven ecosystem. The issue involves improper neutralization of crlf sequences in http headers in jooby ('http response splitting). Remediation is available by upgrading affected packages to version 2.2.1.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:maven/io.jooby/jooby-netty

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:maven/io.jooby/jooby-netty. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-gv3v-92v6-m48j CVE-2020-7622 CRITICAL Improper Neutralization of CRLF Sequences in HTTP Headers in Jooby ('HTTP Response Splitting)

CVE-2020-7622 at a Glance

CVE Identifier CVE-2020-7622
GHSA Identifier GHSA-gv3v-92v6-m48j
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Affected Product Jooby netty
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2020-7622

To remediate this vulnerability, upgrade all affected Jooby netty dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

io.jooby:jooby-netty fixed: 2.2.1 
<dependency>
    <groupId>io.jooby</groupId>
    <artifactId>jooby-netty</artifactId>
    <version>2.2.1</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=io.jooby

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2020-7622, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=io.jooby

Analyze the terminal output to locate any version of Jooby netty in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.2.1), your application is affected.

Note: The mvn dependency:tree -Dincludes=io.jooby command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling'), where the product acts as an intermediary http agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed http requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination. In Jooby netty, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact - Cross Site Scripting - Cache Poisoning - Page Hijacking ### Patches This was fixed in version `2.2.1`. ### Workarounds If you are unable to update, ensure that user supplied data isn't able to flow to HTTP headers. If it does, pre-sanitize for CRLF characters. ### References ##### [CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting')](https://cwe.mitre.org/data/definitions/113.html) I've been poking at libraries to see if they are vulnerable to HTTP Response Splitting and Jooby is my third case of finding this vulnerability. ### Root Cause This roots cause back to this line in the Jooby codebase: https://github.com/jooby-project/jooby/blob/93cfc80aa20c188f71a442ea7a1827da380e1c27/modules/jooby-netty/src/main/java/io/jooby/internal/netty/NettyContext.java#L102 The `DefaultHttpHeaders` takes a parameter `validate` which, when `true` (as it is for the no-arg constructor) validates that the header isn't being abused to do HTTP Response Splitting. ### Reported By This vulnerability was reported by @JLLeitschuh ([Twitter](https://twitter.com/JLLeitschuh)) ### For more information If you have any questions or comments about this advisory: * Open an issue in [jooby-project/jooby](https://github.com/jooby-project/jooby/issues)

CVE-2020-7622 Affected Jooby netty Versions

1 component(s)
Fixed Versions:
2.2.1
Product / Package Ecosystem Affected Versions Fixed Version
io.jooby:jooby-netty
maven/io.jooby/jooby-netty
Maven
< 2.2.1
2.2.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/jooby-project/jooby/security/advisories/GHSA-gv3v-92v6-m48j
NVD — CVE-2020-7622 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-7622
Security Fix Commit FIX COMMIT
https://github.com/jooby-project/jooby/commit/b66e3342cf95205324023cfdf2cb5811e8a6dcf4
snyk.io/vuln/snyk-java-iojo... WEB
https://snyk.io/vuln/SNYK-JAVA-IOJOOBY-564249

Frequently Asked Questions

What is CVE-2020-7622?
CVE-2020-7622 is a security vulnerability in Jooby netty involving Improper Neutralization of CRLF Sequences in HTTP Headers in Jooby ('HTTP Response Splitting) under CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling').
Which Jooby netty versions are affected?
Affected versions include releases prior to 2.2.1 across affected packages: io.jooby:jooby-netty.
What version fixes CVE-2020-7622?
Upgrading to 2.2.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is jooby-netty affected?
Yes, io.jooby:jooby-netty is affected in releases prior to 2.2.1. Upgrade your dependency to 2.2.1 or later.
What is the CVSS score of CVE-2020-7622?
CVE-2020-7622 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2020-7622?
CVE-2020-7622 is classified under CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') (The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.).
How can I check Maven dependencies for CVE-2020-7622?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=io.jooby'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-gv3v-92v6-m48j",
  "modified" : "2021-07-29T15:47:43Z",
  "published" : "2020-04-03T15:23:30Z",
  "aliases" : [ "CVE-2020-7622" ],
  "summary" : "Improper Neutralization of CRLF Sequences in HTTP Headers in Jooby ('HTTP Response Splitting)",
  "details" : "### Impact\n\n - Cross Site Scripting\n - Cache Poisoning\n - Page Hijacking\n\n### Patches\n\nThis was fixed in version `2.2.1`.\n\n### Workarounds\n\nIf you are unable to update, ensure that user supplied data isn't able to flow to HTTP headers. If it does, pre-sanitize for CRLF characters.\n\n### References\n\n##### [CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting')](https://cwe.mitre.org/data/definitions/113.html)\n\nI've been poking at libraries to see if they are vulnerable to HTTP Response Splitting and Jooby is my third case of finding this vulnerability.\n\n### Root Cause\n\nThis roots cause back to this line in the Jooby codebase:\n\nhttps://github.com/jooby-project/jooby/blob/93cfc80aa20c188f71a442ea7a1827da380e1c27/modules/jooby-netty/src/main/java/io/jooby/internal/netty/NettyContext.java#L102\n\nThe `DefaultHttpHeaders` takes a parameter `validate` which, when `true` (as it is for the no-arg constructor) validates that the header isn't being abused to do HTTP Response Splitting.\n\n### Reported By\n\nThis vulnerability was reported by @JLLeitschuh ([Twitter](https://twitter.com/JLLeitschuh))\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [jooby-project/jooby](https://github.com/jooby-project/jooby/issues)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "io.jooby:jooby-netty"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.2.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/jooby-project/jooby/security/advisories/GHSA-gv3v-92v6-m48j"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-7622"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jooby-project/jooby/commit/b66e3342cf95205324023cfdf2cb5811e8a6dcf4"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JAVA-IOJOOBY-564249"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-444" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-04-02T23:59:56Z",
    "nvd_published_at" : "2020-04-06T15:15:00Z"
  }
}