High severity · published Mar 24, 2023
CVE-2021-43312
A heap-based buffer overflow was discovered in upx, during the variable 'bucket' points to an inaccessible address
7.5
CVSS
0.8%
EPSS
No
On KEV
Description
A heap-based buffer overflow was discovered in upx, during the variable 'bucket' points to an inaccessible address. The issue is being triggered in the function PackLinuxElf64::invert_pt_dynamic at p_lx_elf.cpp:5239.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 57% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UP
Upx · Upx
before 4.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-43312
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-43312
Exploit
https://github.com/upx/upx/issues/379
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