High severity vulnerability that affects handlebars
Versions of handlebars prior to 4.3.0 are vulnerable to Prototype Pollution leading to Remote Code Execution. Templates may alter an Object's proto and defineGetter properties, which may allow an attacker to execute arbitrary code through crafted payloads.
Prototype Pollution in handlebars
Versions of handlebars prior to 4.0.14 are vulnerable to Prototype Pollution. Templates may alter an Objects' prototype, thus allowing an attacker to execute arbitrary code on the server.
Recommendation
For handlebars 4.1.x upgrade to 4.1.2 or later.
For handlebars 4.0.x upgrade to 4.0.14 or later.
Denial of Service in handlebars
Affected versions of handlebars are vulnerable to Denial of Service. The package's parser may be forced into an endless loop while processing specially-crafted templates. This may allow attackers to exhaust system resources leading to Denial of Service.
Arbitrary Code Execution in handlebars
Versions of handlebars prior to 3.0.8 or 4.5.2 are vulnerable to Arbitrary Code Execution. The package's lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript in the system. It can be used to run arbitrary code in a server processing Handlebars templates or on a victim's browser (effectively serving as Cross-Site Scripting).
The following template can be used to demonstrate the vulnerability:
Prototype Pollution in handlebars
Versions of handlebars prior to 3.0.8 or 4.5.3 are vulnerable to prototype pollution. It is possible to add or modify properties to the Object prototype through a malicious template. This may allow attackers to crash the application or execute Arbitrary Code in specific conditions.
Remote code execution in handlebars when compiling templates
The package handlebars before 4.7.7 are vulnerable to Remote Code Execution (RCE) when selecting certain compiling options to compile templates coming from an untrusted source.
fix: check prototype property access in strict-mode (#1736) - b6d3de7
fix: escape property names in compat mode (#1736) - f058970
refactor: In spec tests, use expectTemplate over equals and shouldThrow (#1683) - 77825f8
chore: start testing on Node.js 12 and 13 - 3789a30
(POSSIBLY) BREAKING CHANGES:
the changes from version 4.6.0 now also apply
in when using the compile-option "strict: true". Access to prototype properties is forbidden completely by default, specific properties or methods
can be allowed via runtime-options. See #1633 for details. If you are using Handlebars as documented, you should not be accessing prototype properties
from your template anyway, so the changes should not be a problem for you. Only the use of undocumented features can break your build.
That is why we only bump the patch version despite mentioning breaking changes.
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Bumps handlebars from 4.0.12 to 4.7.7. This update includes security fixes.
Vulnerabilities fixed
Sourced from The GitHub Security Advisory Database.
Sourced from The Node Security Working Group.
Sourced from The GitHub Security Advisory Database.
Sourced from The GitHub Security Advisory Database.
Sourced from The GitHub Security Advisory Database.
Sourced from The GitHub Security Advisory Database.
Sourced from The GitHub Security Advisory Database.
Changelog
Sourced from handlebars's changelog.
... (truncated)
Commits
a9a8e40
v4.7.7e66aed5
Update release notes7d4d170
disable IE in Saucelabs testseb860c0
fix weird error in integration testsb6d3de7
fix: check prototype property access in strict-mode (#1736)f058970
fix: escape property names in compat mode (#1736)77825f8
refator: In spec tests, use expectTemplate over equals and shouldThrow (#1683)3789a30
chore: start testing on Node.js 12 and 13e6ad93e
v4.7.62bf4fc6
Update release notesDependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
@dependabot rebase
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