Vulnerability identifier: #VU84098

Vulnerability risk: Low

CVSSv3.1: 4.4 [CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-23457

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

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

Vendor: UPX

Description

The vulnerability allows a local user to perform a denial of service attack.

The vulnerability exists due to a boundary error in UPX in PackLinuxElf64::invert_pt_dynamic() in p_lx_elf.cpp. A local user can create a specially crafted data, trick the victim into opening it, trigger memory corruption and perform a denial of service attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

UPX: 4.0.0 - 4.0.1

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External links
http://bugzilla.redhat.com/show_bug.cgi?id=2160382
http://github.com/upx/upx/commit/779b648c5f6aa9b33f4728f79dd4d0efec0bf860
http://github.com/upx/upx/issues/631
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EL3BVKIGG3SH6I3KPOYQAWCBD4UMPOPI/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TGEP3FBNRZXGLIA2B2ICMB32JVMPREFZ/

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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