PT-2021-18764 · Upx+2 · Upx+2

Chibataiki · Published 2020-10-02 · Updated 2023-04-11 · CVE-2021-30501

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions UPX version 4.0.0

Description An assertion abort was found in the MemBuffer::alloc() function in mem.cpp, allowing attackers to cause a denial of service (abort) via a crafted file.

Recommendations For UPX version 4.0.0, consider avoiding the use of crafted files that may trigger the assertion abort in MemBuffer::alloc() until a patch is available. At the moment, there is no information about a newer version that contains a fix for this issue.

Exploit

Fix

DoS

Assertion Failure

RCE

Weakness Enumeration

CWE-617

CWE-20

Related Identifiers

ALT-PU-2020-2930

CVE-2021-30501

OPENSUSE-SU-2023:0088-1

Affected Products

Alt Linux

Debian

Upx

References · 39

• 🔥 https://github.com/upx/upx/issues/486 · Exploit
• 🔥 https://github.com/upx/upx/pull/487 · Exploit
• https://github.com/upx/upx/commit/28e761cd42211dfe0124b7a29b2f74730f453e46 · Patch
• https://bugzilla.redhat.com/show_bug.cgi?id=1948696 · Patch
• https://cve.org/CVERecord?id=CVE-2021-30501 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-30501 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2023:0088-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-30501 · Security Note
• https://osv.dev/vulnerability/CVE-2021-30501 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-30501 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-30501 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-30501 · Vendor Advisory
• https://suse.com/security/cve/CVE-2021-20285 · Note
• https://suse.com/security/cve/CVE-2023-23457 · Note
• https://suse.com/security/cve/CVE-2021-30500 · Note