CVE-2021-30501

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.

CVSS v3 5.5 MEDIUM
CVSS v2.0 4.3 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

4.3^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:N/I:N/A:P

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1948696	Issue Tracking Patch Third Party Advisory
https://github.com/upx/upx/commit/28e761cd42211dfe0124b7a29b2f74730f453e46	Patch Third Party Advisory
https://github.com/upx/upx/issues/486	Exploit Issue Tracking Third Party Advisory
https://github.com/upx/upx/pull/487	Exploit Patch Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1948696	Issue Tracking Patch Third Party Advisory
https://github.com/upx/upx/commit/28e761cd42211dfe0124b7a29b2f74730f453e46	Patch Third Party Advisory
https://github.com/upx/upx/issues/486	Exploit Issue Tracking Third Party Advisory
https://github.com/upx/upx/pull/487	Exploit Patch Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:upx:upx:4.0.0:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*

Configuration 3 (hide)

cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

History

11 Apr 2025, 12:27

Type	Values Removed	Values Added
First Time		Upx Upx upx
CPE	cpe:2.3:a:upx_project:upx:4.0.0:::::::*	cpe:2.3:a:upx:upx:4.0.0:::::::*

Information

Published : 2021-05-27 00:15

Updated : 2025-04-11 12:27

NVD link : CVE-2021-30501

Mitre link : CVE-2021-30501

CVE.ORG link : CVE-2021-30501

JSON object : View

Products Affected

fedoraproject

fedora

redhat

enterprise_linux

upx

upx

CWE

CWE-20

Improper Input Validation

CWE-617

Reachable Assertion

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