CVE-2021-3478

Theres a flaw in OpenEXRs scanline input file functionality in versions before 3.0.0-beta. An attacker able to submit a crafted file to be processed by OpenEXR could consume excessive system memory. The greatest impact of this flaw is to system availability.

Weakness

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

Affected Software

Name	Vendor	Start Version	End Version
Openexr	Openexr	*	2.4.3 (excluding)
Openexr	Openexr	2.5.0 (including)	2.5.4 (excluding)
Openexr	Ubuntu	bionic	*
Openexr	Ubuntu	esm-apps/focal	*
Openexr	Ubuntu	esm-infra/bionic	*
Openexr	Ubuntu	esm-infra/xenial	*
Openexr	Ubuntu	focal	*
Openexr	Ubuntu	groovy	*
Openexr	Ubuntu	trusty	*
Openexr	Ubuntu	upstream	*
Openexr	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-2021-3478
CWE	https://cwe.mitre.org/data/definitions/400.html

Uncontrolled Resource Consumption

Weakness

Affected Software

Potential Mitigations

References

CVE-2021-3478

Uncontrolled Resource Consumption

Weakness

Affected Software

Potential Mitigations

Related Attack Patterns

References