rexml Gem up to 3.3.8 on Ruby redos

Summaryinfo

A vulnerability identified as critical has been detected in rexml Gem up to 3.3.8 on Ruby. This affects an unknown part. The manipulation leads to redos. This vulnerability is listed as CVE-2024-49761. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in rexml Gem up to 3.3.8 on Ruby. This issue affects some unknown functionality. The manipulation with an unknown input leads to a redos vulnerability. Using CWE to declare the problem leads to CWE-1333. The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. Impacted is availability. The summary by CVE is:

REXML is an XML toolkit for Ruby. The REXML gem before 3.3.9 has a ReDoS vulnerability when it parses an XML that has many digits between &# and x...; in a hex numeric character reference (&#x...;). This does not happen with Ruby 3.2 or later. Ruby 3.1 is the only affected maintained Ruby. The REXML gem 3.3.9 or later include the patch to fix the vulnerability.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2024-49761 since 10/18/2024. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1449.003 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 210332 (Ubuntu 22.04 LTS / 24.04 LTS / 24.10 : Ruby vulnerabilities (USN-7091-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.3.9 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (210332) and CERT Bund (WID-SEC-2024-3276). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

• Debian Linux
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Xerox FreeFlow Print Server
• Oracle Linux
• Gentoo Linux
• SUSE openSUSE
• IBM License Metric Tool
• RESF Rocky Linux
• Open Source Ruby
• IBM DB2
• Open Source LogStash

Productinfo

Type

• Ruby Gem

Name

• rexml Gem

Version

• 3.3.0
• 3.3.1
• 3.3.2
• 3.3.3
• 3.3.4
• 3.3.5
• 3.3.6
• 3.3.7
• 3.3.8

CPE 2.3info

• 🔍
• 🔍
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CPE 2.2info

• 🔍
• 🔍
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Exploitinginfo

Threat Intelligenceinfo

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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