CVE-2024-39908 — Denial of service in REXML

Affected: ruby rexml, ruby-lang rexml

REXML is an XML toolkit for Ruby. 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 many be impacted to these vulnerabilities. The REXML gem 3.3.2 or later include the patches to fix these vulnerabilities. Users are advised to upgrade. Users unable to upgrade should avoid parsing untrusted XML strings.

USN-7091-1 — ruby3.0, ruby3.2, ruby3.3 vulnerabilities

Affected: Ubuntu:22.04:LTS: ruby3.0, Ubuntu:24.04:LTS: ruby3.2

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. (CVE-2024-35176, CVE-2024-39908, CVE-2024-41123)

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. (CVE-2024-41946)

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. (CVE-2024-49761)

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CVE-2024-39908 — Denial of service in REXML

USN-7091-1 — ruby3.0, ruby3.2, ruby3.3 vulnerabilities