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SCA: security update for org.apache.tapestry:tapestry-core (GHSA-mj8x-cpr8-x39h)

critical Tenable Cloud Security Plugin ID 416998

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - A critical unauthenticated remote code execution vulnerability was found all recent versions of Apache
 Tapestry. The affected versions include 5.4.5, 5.5.0, 5.6.2 and 5.7.0. The vulnerability I have found is a
 bypass of the fix for CVE-2019-0195. Recap: Before the fix of CVE-2019-0195 it was possible to download
 arbitrary class files from the classpath by providing a crafted asset file URL. An attacker was able to
 download the file `AppModule.class` by requesting the URL
 `http://localhost:8080/assets/something/services/AppModule.class` which contains a HMAC secret key. The
 fix for that bug was a blacklist filter that checks if the URL ends with `.class`, `.properties` or
 `.xml`. Bypass: Unfortunately, the blacklist solution can simply be bypassed by appending a `/` at the end
 of the URL: `http://localhost:8080/assets/something/services/AppModule.class/` The slash is stripped after
 the blacklist check and the file `AppModule.class` is loaded into the response. This class usually
 contains the HMAC secret key which is used to sign serialized Java objects. With the knowledge of that key
 an attacker can sign a Java gadget chain that leads to RCE (e.g. CommonsBeanUtils1 from ysoserial).
 Solution for this vulnerability: * For Apache Tapestry 5.4.0 to 5.6.1, upgrade to 5.6.2 or later. * For
 Apache Tapestry 5.7.0, upgrade to 5.7.1 or later. (CVE-2021-27850)

See Also

https://github.com/advisories/GHSA-mj8x-cpr8-x39h

Plugin Details

Severity: Critical

ID: 416998

Version: Revision 1.4

Type: Local

Family: SCA Checks

Published: 1/23/2025

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: High

Score: 7.9

Percentile: 99.37

Vendor

Vendor Severity: Critical

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2021-27850

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/16/2021

Vulnerability Publication Date: 4/15/2021

Reference Information

CVE: CVE-2021-27850