CVE-2021-30501

MEDIUM

UPX 4.0.0 - Denial of Service via Crafted File in MemBuffer::alloc()

Title source: llm
STIX 2.1

Description

An assertion abort was found in upx MemBuffer::alloc() in mem.cpp, in version UPX 4.0.0. The flow allows attackers to cause a denial of service (abort) via a crafted file.

References (4)

Core 4
Core References
Issue Tracking, Patch, Third Party Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1948696
Exploit, Issue Tracking, Third Party Advisory x_refsource_misc
https://github.com/upx/upx/issues/486
Exploit, Patch, Third Party Advisory x_refsource_misc
https://github.com/upx/upx/pull/487

Scores

CVSS v3 5.5
EPSS 0.0034
EPSS Percentile 56.4%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Details

CWE
CWE-617 CWE-20
Status published
Products (3)
fedoraproject/fedora 33
redhat/enterprise_linux 7.0
upx/upx 4.0.0
Published May 27, 2021
Tracked Since Feb 18, 2026