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CVE-2021-44078

8.1 · HIGH

An issue was discovered in split_region in uc.c in Unicorn Engine before 2.0.0-rc5.

Published Dec 26, 2021CWE-697EPSS 0.53%

Overview

CVE-2021-44078 is a high-severity vulnerability. It was published on December 26, 2021 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

An issue was discovered in split_region in uc.c in Unicorn Engine before 2.0.0-rc5. It allows local attackers to escape the sandbox. An attacker must first obtain the ability to execute crafted code in the target sandbox in order to exploit this vulnerability. The specific flaw exists within the virtual memory manager. The issue results from the faulty comparison of GVA and GPA while calling uc_mem_map_ptr to free part of a claimed memory block. An attacker can leverage this vulnerability to escape the sandbox and execute arbitrary code on the host machine.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgist.github.com/jwang-a/cb4b6e9551457aa299066076b836a2cdGitHubgithub.com/jwang-a/CTF/blob/master/MyChallenges/Pwn/Unicorns_Aisle/UnicornsAisle.pdfGitHubgithub.com/unicorn-engine/unicorn/commit/c733bbada356b0373fa8aa72c044574bb855fd24GitHubgithub.com/unicorn-engine/unicorn/compare/2.0.0-rc4...2.0.0-rc5Refwww.unicorn-engine.org/changelog/GitHubgist.github.com/jwang-a/cb4b6e9551457aa299066076b836a2cdGitHubgithub.com/jwang-a/CTF/blob/master/MyChallenges/Pwn/Unicorns_Aisle/UnicornsAisle.pdfGitHubgithub.com/unicorn-engine/unicorn/commit/c733bbada356b0373fa8aa72c044574bb855fd24GitHubgithub.com/unicorn-engine/unicorn/compare/2.0.0-rc4...2.0.0-rc5Refwww.unicorn-engine.org/changelog/

How CyberStrike helps

Frequently asked questions

What is CVE-2021-44078?

CVE-2021-44078 is a high-severity vulnerability. It was published on December 26, 2021 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2021-44078?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-44078?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-44078?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-44078 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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