Homepage
About Snyk

Improper Input Validation Affecting org.glassfish:javax.el package, versions [0,]

0.0
high

Snyk CVSS

    Attack Complexity Low

    Threat Intelligence

    EPSS 0.09% (38th percentile)
Expand this section
NVD
5.3 medium
Expand this section
Red Hat
7.5 high

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk ID SNYK-JAVA-ORGGLASSFISH-2841368
  • published 27 May 2021
  • disclosed 27 May 2021
  • credit @pwntester (Alvaro Muñoz)
Report a new vulnerability Found a mistake?

Introduced: 27 May 2021

CVE-2021-28170 Open this link in a new tab
CWE-20 Open this link in a new tab

How to fix?

There is no fixed version for org.glassfish:javax.el.

Overview

Affected versions of this package are vulnerable to Improper Input Validation. A bug in the ELParserTokenManager enables invalid EL expressions to be evaluated as if they were valid.

The bug seems to be in the parser’s grammar - $ or # followed by a character that is not {, $ or # will be treated as a literal expression. The pertinent case is when the character following the $ or # chars is a backslash. The parser will then consume the backslash as part of the literal expression and will leave the character that follows it unescaped.

Note: org.glassfish:javax.el is deprecated, users can move to use org.glassfish:jakarta.el instead where this issue is first fixed in version 3.0.4.