xmldom versions 0.4.0 and older do not correctly preserve system identifiers, FPIs or namespaces when repeatedly parsing and serializing maliciously crafted documents.
This may lead to unexpected syntactic changes during XML processing in some downstream applications.
Patches
Update to 0.5.0 (once it is released)
Workarounds
Downstream applications can validate the input and reject the maliciously crafted documents.
References
Similar to this one reported on the Go standard library:
Avoid misinterpretation of malicious XML input - GHSA-h6q6-9hqw-rwfv (CVE-2021-21366)
Improve error reporting; throw on duplicate attribute
BREAKING CHANGE: It is currently not clear how to consistently deal with duplicate attributes, so it's also safer for our users to fail when detecting them.
It's possible to configure the DOMParser.errorHandler before parsing, to handle those errors differently.
To accomplish this and also be able to verify it in tests I needed to
create a new Error type ParseError and export it
Throw ParseError from errorHandler.fatalError and prevent those from being caught in XMLReader.
export DOMHandler constructor as __DOMHandler
Preserve quotes in DOCTYPE declaration
Since the only purpose of parsing the DOCTYPE is to be able to restore it when serializing, we decided that it would be best to leave the parsed publicId and systemId as is, including any quotes.
BREAKING CHANGE: If somebody relies on the actual unquoted values of those ids, they will need to take care of either single or double quotes and the right escaping.
(Without this change this would not have been possible because the SAX parser already dropped the information about the quotes that have been used in the source.)
Avoid misinterpretation of malicious XML input - GHSA-h6q6-9hqw-rwfv (CVE-2021-21366)
Improve error reporting; throw on duplicate attribute
BREAKING CHANGE: It is currently not clear how to consistently deal with duplicate attributes, so it's also safer for our users to fail when detecting them.
It's possible to configure the DOMParser.errorHandler before parsing, to handle those errors differently.
To accomplish this and also be able to verify it in tests I needed to
create a new Error type ParseError and export it
Throw ParseError from errorHandler.fatalError and prevent those from being caught in XMLReader.
export DOMHandler constructor as __DOMHandler
Preserve quotes in DOCTYPE declaration
Since the only purpose of parsing the DOCTYPE is to be able to restore it when serializing, we decided that it would be best to leave the parsed publicId and systemId as is, including any quotes.
BREAKING CHANGE: If somebody relies on the actual unquoted values of those ids, they will need to take care of either single or double quotes and the right escaping.
(Without this change this would not have been possible because the SAX parser already dropped the information about the quotes that have been used in the source.)
This version was pushed to npm by karfau, a new releaser for xmldom since your current version.
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Bumps xmldom from 0.1.27 to 0.6.0. This update includes a security fix.
Vulnerabilities fixed
Sourced from The GitHub Security Advisory Database.
... (truncated)
Release notes
Sourced from xmldom's releases.
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Changelog
Sourced from xmldom's changelog.
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Commits
c80a161
xmldon version 0.6.0bc36efd
chore: regenerate package-lock.json8a92704
Update eslint -> ^7.23.0 - devDependencies (#202)b12106e
Update @stryker-mutator/core -> ^4.5.1 - devDependencies (#192)af4642e
docs: Update Changelog (#197)5869d76
test(stryker): Replace line numbers by error index (#201)a681852
fix: Escape<
when serializing attribute values (#199)bb12247
Update eslint-config-prettier -> 8 - devDependencies (#187)48c51b3
Update eslint -> ^7.22.0 - devDependencies (#185)82b0481
refactor!: Avoid empty namespace value like xmlns:ds="" (#168)Maintainer changes
This version was pushed to npm by karfau, a new releaser for xmldom since your current version.
Dependabot 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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