Medium severity · published May 27, 2021
CVE-2021-30501
An assertion abort was found in upx MemBuffer::alloc() in mem.cpp, in version UPX 4.0.0
5.5
CVSS
1%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 64% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EL
Enterprise Linux · Redhat
7.0 · source: NVD
FE
Fedora · Fedoraproject
33 · source: NVD
UP
Upx · Upx
4.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-30501
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-30501
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1948696
Patch
https://github.com/upx/upx/commit/28e761cd42211dfe0124b7a29b2f74730f453e46
Exploit
https://github.com/upx/upx/issues/486
Exploit
https://github.com/upx/upx/pull/487
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