Vulnerabilities > CVE-2019-20805 - Integer Overflow or Wraparound vulnerability in UPX Project UPX

Attack vector

LOCAL

Attack complexity

LOW

Privileges required

NONE

Confidentiality impact

NONE

Integrity impact

NONE

Availability impact

HIGH

local

low complexity

NVD

Published: 2020-06-01

Updated: 2020-06-02

Summary

p_lx_elf.cpp in UPX before 3.96 has an integer overflow during unpacking via crafted values in a PT_DYNAMIC segment.

Part	Description	Count
Application	Upx_Project UPX Project UPX - UPX Project UPX 1.10 UPX Project UPX 1.11 UPX Project UPX 1.90 UPX Project UPX 1.91 UPX Project UPX 1.92 UPX Project UPX 1.93 UPX Project UPX 1.94 UPX Project UPX 1.95 UPX Project UPX 1.96 UPX Project UPX 2.00 UPX Project UPX 2.01 UPX Project UPX 2.90 UPX Project UPX 2.91 UPX Project UPX 2.92 UPX Project UPX 2.93 UPX Project UPX 3.00 UPX Project UPX 3.01 UPX Project UPX 3.02 UPX Project UPX 3.03 UPX Project UPX 3.04 UPX Project UPX 3.05 UPX Project UPX 3.06 UPX Project UPX 3.07 UPX Project UPX 3.08 UPX Project UPX 3.09 UPX Project UPX 3.91 UPX Project UPX 3.92 UPX Project UPX 3.93 UPX Project UPX 3.94 UPX Project UPX 3.95	31

Forced Integer Overflow
This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.