Allocation of Resources Without Limits or Throttling Affecting github.com/expr-lang/expr/vm package, versions <1.17.0
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- published18 Mar 2025
- disclosed17 Mar 2025
- creditVille Vesilehto
Introduced: 17 Mar 2025
NewCVE-2025-29786 (opens in a new tab)How to fix?
Upgrade github.com/expr-lang/expr/vm to version 1.17.0 or higher.
Overview
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the parseExpression() function in parser.go, due to the unrestricted size of input strings, which can cause the generation of large Abstract Syntax Trees (ASTs). An attacker can crash the application by supplying excessively long deeply nested expression strings.
Workaround
This vulnerability can be avoided by checking and limiting the length of input expressions before parsing them.