Vulnerability in Unicorn-Engine Unicorn Engine
CVE-2021-44078
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (42.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Unicorn-Engine Unicorn Engine — versions 2.0.0
Weakness classification (CWE)
References
- www.unicorn-engine.org/changelog/ (Vendor Advisory)
- gist.github.com/jwang-a/cb4b6e9551457aa299066076b836a2cd (Third Party Advisory)
- github.com/unicorn-engine/unicorn/commit/c733bbada356b0373fa8aa72c044574bb855fd… (Patch, Third Party Advisory)
- github.com/jwang-a/CTF/blob/master/MyChallenges/Pwn/Unicorns_Aisle/UnicornsAisl… (Third Party Advisory)
- github.com/unicorn-engine/unicorn/compare/2.0.0-rc4...2.0.0-rc5 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-44078?
- CVE-2021-44078 is a high-severity vulnerability in Unicorn-Engine Unicorn Engine, classified under Incorrect Comparison. CVSS score: 8.1/10. Published 2021-12-26.
- How severe is CVE-2021-44078?
- High severity. CVSS v3 base score is 8.1 out of 10.