5.5

CVE-2023-23456: fedoraproject fedora Out-of-bounds Write

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2023-23456DEBIAN-CVE-2023-23456DLA-3991-1
Published 12-01-2023Last modified 11-12-2024
Open JSON

Vulnerability summary

CVE-2023-23456 is a medium (CVSS 5.5) Out-of-bounds Write vulnerability in fedoraproject fedora. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 31.4% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.39%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 2 · Related 3
MGASA-2023-0052OPENSUSE-SU-2023:0088-1CGA-G3MJ-MGW5-P2GWCGA-WRR5-JPQ6-8XV7

Timeline

  1. 12-01-2023
    PublishedVulnerability first disclosed.
  2. 11-12-2024
    Last modifiedVulnerability information updated.

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 metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.39%

Chance of exploitation in the next 30 days

Percentile

31%

Versus all other CVEs

30-day change

0.00 pp

From 0.39% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.39%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Upx

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Chainguard2 products
  • upx< 5.0.0-r0
  • upx-doc< 5.0.0-r0
Wolfi2 products
  • upx< 5.0.0-r0
  • upx-doc< 5.0.0-r0
Debian1 product
  • upx-ucl< 3.96-2+deb11u1 | < 4.2.2-1
Fedoraproject1 product
Ubuntu1 product
  • upx-uclAll versions (No fix recorded)
Upx1 product
  • upx< 2022-11-24

6 vendors · 8 products

References

12 links
Show all 12 references