CVE-2019-20021

A heap-based buffer over-read was discovered in canUnpack in p_mach.cpp in UPX 3.95 via a crafted Mach-O 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
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00003.html	Broken Link
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00007.html	Broken Link
https://github.com/upx/upx/issues/315	Exploit Issue Tracking Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D7XU42G6MUQQXHWRP7DCF2JSIBOJ5GOO/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EUTVSTXAFTD552NO2K2RIF6MDQEHP3BE/
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00003.html	Broken Link
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00007.html	Broken Link
https://github.com/upx/upx/issues/315	Exploit Issue Tracking Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D7XU42G6MUQQXHWRP7DCF2JSIBOJ5GOO/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EUTVSTXAFTD552NO2K2RIF6MDQEHP3BE/

Configurations

Configuration 1 (hide)

cpe:2.3:a:upx:upx:3.95:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:fedoraproject:fedora:30:::::::*
	cpe:2.3:o:fedoraproject:fedora:31:::::::*

History

11 Apr 2025, 12:27

Type	Values Removed	Values Added
First Time		Upx Upx upx
CPE	cpe:2.3:a:upx_project:upx:3.95:::::::*	cpe:2.3:a:upx:upx:3.95:::::::*

Information

Published : 2019-12-27 02:15

Updated : 2025-04-11 12:27

NVD link : CVE-2019-20021

Mitre link : CVE-2019-20021

CVE.ORG link : CVE-2019-20021

JSON object : View

Products Affected

fedoraproject

fedora

upx

upx

CWE

CWE-125

Out-of-bounds Read

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