Headline
GHSA-4xqq-m2hx-25v8: REXML denial of service vulnerability
Impact
The REXML gem before 3.3.1 has some DoS vulnerabilities when it parses an XML that has many specific characters such as <, 0 and %>.
If you need to parse untrusted XMLs, you may be impacted to these vulnerabilities.
Patches
The REXML gem 3.3.2 or later include the patches to fix these vulnerabilities.
Workarounds
Don’t parse untrusted XMLs.
References
- https://github.com/ruby/rexml/security/advisories/GHSA-vg3r-rm7w-2xgh : This is a similar vulnerability
- https://www.ruby-lang.org/en/news/2024/07/16/dos-rexml-cve-2024-39908/
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- GitHub Advisory Database
- GitHub Reviewed
- CVE-2024-39908
REXML denial of service vulnerability
Moderate severity GitHub Reviewed Published Jul 16, 2024 in ruby/rexml
Package
Affected versions
< 3.3.2
Description
Published to the GitHub Advisory Database
Jul 16, 2024
Severity
CVSS base metrics
User interaction
Required
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Weaknesses
GHSA ID
GHSA-4xqq-m2hx-25v8
Source code
Related news
Ubuntu Security Notice 7091-2 - USN-7091-1 fixed several vulnerabilities in Ruby. This update provides the corresponding update for ruby2.7 in Ubuntu 20.04 LTS. It was discovered that Ruby incorrectly handled parsing of an XML document that has specific XML characters in an attribute value using REXML gem. An attacker could use this issue to cause Ruby to crash, resulting in a denial of service. This issue only affected in Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. It was discovered that Ruby incorrectly handled parsing of an XML document that has many entity expansions with SAX2 or pull parser API. An attacker could use this issue to cause Ruby to crash, resulting in a denial of service. It was discovered that Ruby incorrectly handled parsing of an XML document that has many digits in a hex numeric character reference. An attacker could use this issue to cause Ruby to crash, resulting in a denial of service.
Ubuntu Security Notice 7091-1 - It was discovered that Ruby incorrectly handled parsing of an XML document that has specific XML characters in an attribute value using REXML gem. An attacker could use this issue to cause Ruby to crash, resulting in a denial of service. This issue only affected in Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. It was discovered that Ruby incorrectly handled parsing of an XML document that has many entity expansions with SAX2 or pull parser API. An attacker could use this issue to cause Ruby to crash, resulting in a denial of service.
Red Hat Security Advisory 2024-6785-03 - An update for the ruby:3.3 module is now available for Red Hat Enterprise Linux 9. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2024-6784-03 - An update for the ruby:3.3 module is now available for Red Hat Enterprise Linux 8. Issues addressed include a denial of service vulnerability.