CVE-2021-44078

描述

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.

如何修補 CVE-2021-44078

要修補 CVE-2021-44078,請將受影響套件升級到下列已修補版本。

• —升級至 c733bbada356b0373fa8aa72c044574bb855fd24 或更新版本

CVE-2021-44078 正在被利用嗎?

低 — EPSS 為 0.1%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• from 0, < c733bbada356b0373fa8aa72c044574bb855fd24 | from 0, < 2.0.0rc1

參考連結(5)

• PATCHgithub.com/unicorn-engine/unicorn/commit/c733bbada356b0373fa8aa72c044574bb855fd24
• WEBgist.github.com/jwang-a/cb4b6e9551457aa299066076b836a2cd
• WEBgithub.com/jwang-a/CTF/blob/master/MyChallenges/Pwn/Unicorns_Aisle/UnicornsAisle.pdf
• WEBgithub.com/unicorn-engine/unicorn/compare/2.0.0-rc4...2.0.0-rc5