CVE-2021-30500

Null pointer dereference was found in upx PackLinuxElf::canUnpack() in p_lx_elf.cpp,in version UPX 4.0.0. That allow attackers to execute arbitrary code and cause a denial of service via a crafted file.

CVSS v3 7.8 HIGH
CVSS v2.0 6.8 MEDIUM

7.8^/10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

V2 Legend

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

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1948692	Issue Tracking Third Party Advisory
https://github.com/upx/upx/commit/90279abdfcd235172eab99651043051188938dcc	Patch Third Party Advisory
https://github.com/upx/upx/issues/485	Exploit Issue Tracking Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1948692	Issue Tracking Third Party Advisory
https://github.com/upx/upx/commit/90279abdfcd235172eab99651043051188938dcc	Patch Third Party Advisory
https://github.com/upx/upx/issues/485	Exploit Issue Tracking 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
CPE	cpe:2.3:a:upx_project:upx:4.0.0:::::::*	cpe:2.3:a:upx:upx:4.0.0:::::::*
First Time		Upx upx Upx

21 Nov 2024, 06:04

Type	Values Removed	Values Added
References	~~() https://bugzilla.redhat.com/show_bug.cgi?id=1948692 - Issue Tracking, Third Party Advisory~~	() https://bugzilla.redhat.com/show_bug.cgi?id=1948692 - Issue Tracking, Third Party Advisory
References	~~() https://github.com/upx/upx/commit/90279abdfcd235172eab99651043051188938dcc - Patch, Third Party Advisory~~	() https://github.com/upx/upx/commit/90279abdfcd235172eab99651043051188938dcc - Patch, Third Party Advisory
References	~~() https://github.com/upx/upx/issues/485 - Exploit, Issue Tracking, Third Party Advisory~~	() https://github.com/upx/upx/issues/485 - Exploit, Issue Tracking, Third Party Advisory

08 Jun 2021, 02:05

Type	Values Removed	Values Added
References	~~(MISC) https://github.com/upx/upx/issues/485 -~~	(MISC) https://github.com/upx/upx/issues/485 - Exploit, Issue Tracking, Third Party Advisory
References	~~(MISC) https://bugzilla.redhat.com/show_bug.cgi?id=1948692 -~~	(MISC) https://bugzilla.redhat.com/show_bug.cgi?id=1948692 - Issue Tracking, Third Party Advisory
References	~~(MISC) https://github.com/upx/upx/commit/90279abdfcd235172eab99651043051188938dcc -~~	(MISC) https://github.com/upx/upx/commit/90279abdfcd235172eab99651043051188938dcc - Patch, Third Party Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : 6.8 v3 : 7.8
CPE		cpe:2.3:a:upx_project:upx:4.0.0:::::::* cpe:2.3:o:redhat:enterprise_linux:7.0:::::::* cpe:2.3:o:fedoraproject:fedora:33:::::::*

27 May 2021, 02:11

Type	Values Removed	Values Added
CWE		CWE-476

27 May 2021, 00:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2021-05-27 00:15

Updated : 2025-04-11 12:27

NVD link : CVE-2021-30500

Mitre link : CVE-2021-30500

CVE.ORG link : CVE-2021-30500

JSON object : View

Products Affected

redhat

enterprise_linux

upx

fedoraproject

fedora

CWE

CWE-476

NULL Pointer Dereference

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7.8 /10