CVE-2024-41818

fast-xml-parser is an open source, pure javascript xml parser. a ReDOS exists on currency.js. This vulnerability is fixed in 4.4.1.

Weakness

The product does not properly control the allocation and maintenance of a limited resource.

Affected Software

Potential Mitigations

• Mitigation of resource exhaustion attacks requires that the target system either:

• The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.

• The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/147.html
• https://cwe.mitre.org/data/definitions/227.html
• https://cwe.mitre.org/data/definitions/492.html

References

• https://github.com/NaturalIntelligence/fast-xml-parser/blob/master/src/v5/valueParsers/currency.js#L10
• https://github.com/NaturalIntelligence/fast-xml-parser/commit/ba5f35e7680468acd7906eaabb2f69e28ed8b2aa
• https://github.com/NaturalIntelligence/fast-xml-parser/commit/d0bfe8a3a2813a185f39591bbef222212d856164
• https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-mpg4-rc92-vx8v
• https://github.com/NaturalIntelligence/fast-xml-parser/blob/master/src/v5/valueParsers/currency.js#L10
• https://github.com/NaturalIntelligence/fast-xml-parser/commit/d0bfe8a3a2813a185f39591bbef222212d856164
• https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-mpg4-rc92-vx8v