Vulnerability identifier: #VU23830

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-15056

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
UPX
Universal components / Libraries / Libraries used by multiple products

Vendor: UPX

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing ELF headers within the PackLinuxElf64::unpack() function in p_lx_elf.cpp. A remote attacker can create a specially crafted, pass it to the application, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

UPX: 3.94

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External links
http://github.com/upx/upx/issues/128

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.