CVE-2021-32823

In the bindata RubyGem before version 2.4.10 there is a potential denial-of-service vulnerability. In affected versions it is very slow for certain classes in BinData to be created. For example BinData::Bit100000, BinData::Bit100001, BinData::Bit100002, BinData::Bit. In combination with <user_input>.constantize there is a potential for a CPU-based DoS. In version 2.4.10 bindata improved the creation time of Bits and Integers.

Weakness

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

Affected Software

Name	Vendor	Start Version	End Version
Bindata	Bindata_project	*	2.4.10 (excluding)
Ruby-bindata	Ubuntu	bionic	*
Ruby-bindata	Ubuntu	focal	*
Ruby-bindata	Ubuntu	groovy	*
Ruby-bindata	Ubuntu	hirsute	*
Ruby-bindata	Ubuntu	impish	*
Ruby-bindata	Ubuntu	kinetic	*
Ruby-bindata	Ubuntu	lunar	*
Ruby-bindata	Ubuntu	mantic	*
Ruby-bindata	Ubuntu	oracular	*
Ruby-bindata	Ubuntu	plucky	*
Ruby-bindata	Ubuntu	trusty	*
Ruby-bindata	Ubuntu	xenial	*

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.

NVD	https://nvd.nist.gov/vuln/detail/CVE-2021-32823
CWE	https://cwe.mitre.org/data/definitions/400.html

Uncontrolled Resource Consumption

Weakness

Affected Software

Potential Mitigations

References

CVE-2021-32823

Uncontrolled Resource Consumption

Weakness

Affected Software

Potential Mitigations

Related Attack Patterns

References