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    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:Dec 26, 2021
    Last Modified:Nov 21, 2024
    EPS:Dec 26, 2021
    EPSS Score:0.00233
    CVSS Score:8.1

    Affected Products

    Vendor
    Unicorn-engine
    Product
    Unicorn Engine

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-697 Incorrect Comparison

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-10 Buffer Overflow via Environment Variables
    CAPEC-120 Double Encoding
    CAPEC-14 Client-side Injection-induced Buffer Overflow
    CAPEC-15 Command Delimiters
    CAPEC-182 Flash Injection
    CAPEC-24 Filter Failure through Buffer Overflow
    CAPEC-267 Leverage Alternate Encoding
    CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters
    CAPEC-41 Using Meta-characters in E-mail Headers to Inject Malicious Payloads
    CAPEC-43 Exploiting Multiple Input Interpretation Layers
    CAPEC-44 Overflow Binary Resource File
    CAPEC-45 Buffer Overflow via Symbolic Links
    CAPEC-46 Overflow Variables and Tags
    CAPEC-47 Buffer Overflow via Parameter Expansion
    CAPEC-52 Embedding NULL Bytes
    CAPEC-53 Postfix, Null Terminate, and Backslash
    CAPEC-6 Argument Injection
    CAPEC-64 Using Slashes and URL Encoding Combined to Bypass Validation Logic
    CAPEC-67 String Format Overflow in syslog()
    CAPEC-7 Blind SQL Injection
    CAPEC-71 Using Unicode Encoding to Bypass Validation Logic
    CAPEC-73 User-Controlled Filename
    CAPEC-78 Using Escaped Slashes in Alternate Encoding
    CAPEC-79 Using Slashes in Alternate Encoding
    CAPEC-8 Buffer Overflow in an API Call
    CAPEC-80 Using UTF-8 Encoding to Bypass Validation Logic
    CAPEC-88 OS Command Injection
    CAPEC-9 Buffer Overflow in Local Command-Line Utilities
    CAPEC-92 Forced Integer Overflow

    Related CVEs

    CVE-2022-29694 (CVSS 7.5) — Unicorn Engine v2.0.0-rc7 and below was discovered to contain a NULL pointer dereference via qemu_ram_free.…
    CVE-2022-29695 (CVSS 7.5) — Unicorn Engine v2.0.0-rc7 contains memory leaks caused by an incomplete unicorn engine initialization.…
    CVE-2022-29693 (CVSS 7.5) — Unicorn Engine v2.0.0-rc7 and below was discovered to contain a memory leak via the function uc_close at /my/u…
    CVE-2022-29692 (CVSS 7.8) — Unicorn Engine v1.0.3 was discovered to contain a use-after-free vulnerability via the hook function.…
    CVE-2021-36979 (CVSS 5.5) — Unicorn Engine 1.0.2 has an out-of-bounds write in tb_flush_armeb (called from cpu_arm_exec_armeb and tcg_cpu_…
    CVE-2020-36431 (CVSS 5.5) — Unicorn Engine 1.0.2 has an out-of-bounds write in helper_wfe_arm.…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High