CVE-2021-43312

HIGH

UPX < 4.0.0 - Heap-Based Buffer Overflow in PackLinuxElf64::invert_pt_dynamic

Title source: llm
STIX 2.1

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.

References (1)

Core 1
Core References
Exploit, Issue Tracking, Patch
https://github.com/upx/upx/issues/379

Scores

CVSS v3 7.5
EPSS 0.0082
EPSS Percentile 52.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-119 CWE-787
Status published
Products (1)
upx/upx < 4.0.0
Published Mar 24, 2023
Tracked Since Feb 18, 2026