High severity · published Aug 25, 2022
CVE-2020-27799
A heap-based buffer over-read was discovered in the acc_ua_get_be32 function in miniacc.h in UPX 4.0.0 via a crafted Mach-O file
7.8
CVSS
0.3%
EPSS
No
On KEV
Description
A heap-based buffer over-read was discovered in the acc_ua_get_be32 function in miniacc.h in UPX 4.0.0 via a crafted Mach-O file.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UP
Upx · Upx
4.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-27799
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-27799
Exploit
https://github.com/upx/upx/issues/391
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