CVE-2019-20053

Name: CVE-2019-20053
Creator: NVD / NIST
Published: 2019-12-27T22:15:11.923+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 1.23%

Last modified Jun 17, 2026

CVE-2019-20053 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. An invalid memory address dereference was discovered in the canUnpack function in p_mach.cpp in UPX 3.95 via a crafted Mach-O file.. EPSS estimates a 1.23% chance of exploitation in the next 30 days.

Description

An invalid memory address dereference was discovered in the canUnpack function in p_mach.cpp in UPX 3.95 via a crafted Mach-O file.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Probability

1.23%

65.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions	Update
Upx	Upx	3.95	—
Opensuse	Backports	sle-15	Sp1
Opensuse	Leap	15.1	—

References

http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00003.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00007.htmlMailing List, Third Party Advisory
https://github.com/upx/upx/issues/314Exploit, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00003.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00007.htmlMailing List, Third Party Advisory
https://github.com/upx/upx/issues/314Exploit, Third Party Advisory

Timeline

Published: Dec 27, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-20053?

An invalid memory address dereference was discovered in the canUnpack function in p_mach.cpp in UPX 3.95 via a crafted Mach-O file.

How severe is CVE-2019-20053?

CVE-2019-20053 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 1.23% probability of exploitation in the next 30 days.

How do I fix CVE-2019-20053?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-20053?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST