Name: CVE-2020-27799: Improper Restriction of Operations within the Bounds of a Memory Buffer
Creator: Rapid7
Published: 2022-08-25T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2020-27799, CWE-119, CWE-125, CVSS 7.8, EPSS 0.00136

A heap-based buffer over-read was discovered in the acc_ua_get_be32 function in miniacc.h in UPX 4.0.0 via a crafted Mach-O file.

CVSS Details

CVSS 3.1 Base Score: 7.8
CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alpine Linux	—	Upgrade upx	Aug 22, 2024	Aug 25, 2022
Debian	—	Upgrade upx-uclNo solution exists	May 15, 2025	Aug 25, 2022
Ubuntu	—	No solution exists	Jun 26, 2025	Aug 25, 2022

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CVSS Details

Covered by Rapid7

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