Double Free in UPX - CVE-2018-11243
Published: December 28, 2019 / Updated: January 29, 2020
Vulnerability identifier: #VU23829
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-11243
CWE-ID: CWE-415
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the PackLinuxElf64::unpack(0 function in p_lx_elf.cpp. A remote attacker can create a specially crafted file, pass it to the application, trigger double free error and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
UPX
upx (Alpine package)
upx
Fedora
SUSE Linux
Opensuse
upx (Alpine package)
upx
Fedora
SUSE Linux
Opensuse
How to mitigate CVE-2018-11243
Install update from vendor's website.
UPX - update to 3.96
upx - addressed in versions 3.96-1.el7, 3.96-1.el8, 3.96-1.fc30, 3.96-2.fc31
upx - addressed in versions 3.96-1.el7, 3.96-1.el8, 3.96-1.fc30, 3.96-2.fc31