#VU23828 Buffer overflow in UPX - CVE-2019-14296

Vulnerability identifier: #VU23828

Vulnerability risk: High

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2019-14296

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 UPX packed files within the canUnpack() function in p_vmlinx.cpp. A remote attacker can create a specially crafted file, trick the victim into opening it, 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 update from vendor's website.

Vulnerable software versions

UPX: 3.95

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External links
https://github.com/upx/upx/issues/287
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MOCJ43HTM45GZCAQ2FLEBDNBM76V22RG/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T52JATXV6NTPTMGXCRGT37H6KXERYNZN/

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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.