CVE-2023-23456

MEDIUM
Published Jan 12, 20233y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jan 12, 2023 3y ago
Last Modified Jun 17, 2026 1w ago

Description

A heap-based buffer overflow issue was discovered in UPX in PackTmt::pack() in p_tmt.cpp file. The flow allows an attacker to cause a denial of service (abort) via a crafted file.

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-787 Out-of-bounds Write Memory Safety

Affected Products 3

VendorProductVersionRange
upxupx* <2022-11-24
fedoraprojectfedora36any
fedoraprojectfedora37any

References 6

  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2160381
    Issue TrackingThird Party Advisory
  • github.com https://github.com/upx/upx/commit/510505a85cbe45e51fbd470f1aa8b02157c429d4
    PatchThird Party Advisory
  • github.com https://github.com/upx/upx/issues/632
    ExploitThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2024/12/msg00013.html
  • 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

  • github.com https://github.com/upx/upx/commit/510505a85cbe45e51fbd470f1aa8b02157c429d4
    PatchThird Party Advisory