CVE-2023-23457

MEDIUM

Published Jan 12, 20233y ago · Modified Jun 17, 20261w ago

5.5 CVSS 3.1

Medium

Published Jan 12, 2023 3y ago

Last Modified Jun 17, 2026 1w ago

Description

A Segmentation fault was found in UPX in PackLinuxElf64::invert_pt_dynamic() in p_lx_elf.cpp. An attacker with a crafted input file allows invalid memory address access that could lead to a denial of service.

CVSS Details

Base Score

5.5

Exploitability

1.8

Impact

3.6

Vector string

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector Local

Attack Complexity Low

Privileges Required None

User Interaction Required

Scope Unchanged

Confidentiality None

Integrity None

Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status

Public Exploit Known

Patch Available

Weaknesses 1

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer Memory Safety

Affected Products 3

Vendor	Product	Version	Range
upx	upx	*	<2022-11-23
fedoraproject	fedora	36	any
fedoraproject	fedora	37	any

References 5

bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2160382

Issue TrackingPatchThird Party Advisory
github.com https://github.com/upx/upx/commit/779b648c5f6aa9b33f4728f79dd4d0efec0bf860

PatchThird Party Advisory
github.com https://github.com/upx/upx/issues/631

ExploitPatchThird Party Advisory
lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EL3BVKIGG3SH6I3KPOYQAWCBD4UMPOPI/
lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TGEP3FBNRZXGLIA2B2ICMB32JVMPREFZ/

Remediation

bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2160382

Issue TrackingPatchThird Party Advisory
github.com https://github.com/upx/upx/commit/779b648c5f6aa9b33f4728f79dd4d0efec0bf860

PatchThird Party Advisory
github.com https://github.com/upx/upx/issues/631

ExploitPatchThird Party Advisory