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Fencer Vulns
high 7.5

CVE-2024-43499 json

.NET and Visual Studio Denial of Service Vulnerability

published 2024-11-12 23 mo ago modified 2026-09-10 1 mo ago also BIT-dotnet-2024-43499 , BIT-dotnet-sdk-2024-43499 , EUVD-2024-3204 , GHSA-6x36-qxmj-rv4p

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.6%
EPSS 2.6% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

.NET and Visual Studio Denial of Service Vulnerability

Patch / fix

  • nuget System.Formats.Nrbf 9.0.0
  • bitnami dotnet 9.0.1
  • bitnami dotnet-sdk 9.0.1
  • Microsoft Microsoft Visual Studio 2022 version 17.6 17.6.21
  • Microsoft Microsoft Visual Studio 2022 version 17.10 17.10.9
  • Microsoft Microsoft Visual Studio 2022 version 17.8 17.8.16
  • Microsoft Microsoft Visual Studio 2022 version 17.11 17.11.6
  • dotnet9.0 RHEL 9 9.0.100-1.el9_5
  • dotnet-host RHEL 9 9.0.0-1.el9_5
  • dotnet-sdk-9.0 RHEL 9 9.0.100-1.el9_5
  • dotnet-hostfxr-9.0 RHEL 9 9.0.0-1.el9_5
  • dotnet-runtime-9.0 RHEL 9 9.0.0-1.el9_5
  • dotnet-sdk-aot-9.0 RHEL 9 9.0.100-1.el9_5
  • dotnet-sdk-dbg-9.0 RHEL 9 9.0.100-1.el9_5
  • dotnet-templates-9.0 RHEL 9 9.0.100-1.el9_5

red hat advisories RHSA-2024:9543

  • dotnet-host AlmaLinux 9 9.0.0-1.el9_5
  • dotnet-sdk-9.0 AlmaLinux 9 9.0.100-1.el9_5
  • dotnet-hostfxr-9.0 AlmaLinux 9 9.0.0-1.el9_5
  • dotnet-runtime-9.0 AlmaLinux 9 9.0.0-1.el9_5
  • dotnet-sdk-aot-9.0 AlmaLinux 9 9.0.100-1.el9_5
  • dotnet-sdk-dbg-9.0 AlmaLinux 9 9.0.100-1.el9_5
  • dotnet-templates-9.0 AlmaLinux 9 9.0.100-1.el9_5
  • aspnetcore-runtime-9.0 AlmaLinux 9 9.0.0-1.el9_5

almalinux advisories ALSA-2024:9543

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-43499 updated cvss 7.5

dotnet: .NET Core - DoS - (unbounded work factor) in NrbfDecoder component

  • Red Hat Enterprise Linux 9 dotnet7.0, dotnet-sdk-7.0, dotnet-hostfxr-7.0, dotnet-runtime-7.0, dotnet-templates-7.0, aspnetcore-runtime-7.0, +4 more
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat CodeReady Linux Builder (v. 9) dotnet-sdk-9.0-source-built-artifacts 9.0.100-1.el9_5 Red Hat Enterprise Linux AppStream (v. 9) dotnet-host 9.0.0-1.el9_5, dotnet9.0 9.0.100-1.el9_5, dotnet-sdk-9.0 9.0.100-1.el9_5, dotnet-hostfxr-9.0 9.0.0-1.el9_5, dotnet-runtime-9.0 9.0.0-1.el9_5, dotnet-sdk-aot-9.0 9.0.100-1.el9_5, +9 more
    fixed: vendor fix RHSA-2024:9543
  • Red Hat Enterprise Linux 8 dotnet, dotnet6.0, dotnet8.0, dotnet-host, dotnet-sdk-6.0, dotnet-sdk-8.0, +20 more Red Hat Enterprise Linux 9 dotnet6.0, dotnet8.0, dotnet-host, dotnet-sdk-6.0, dotnet-sdk-8.0, dotnet-hostfxr-6.0, +19 more Red Hat Enterprise Linux 10 dotnet8.0, dotnet9.0
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
23 mo ago

Exploit prediction

2.60% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
nuget System.Formats.Nrbf
<9.0.0
9.0.0
bitnami dotnet
>=9.0.0, <9.0.1
9.0.1
bitnami dotnet-sdk
>=9.0.0, <9.0.1
9.0.1

Affected products

  • Microsoft Microsoft Visual Studio 2022 version 17.6
  • Microsoft Microsoft Visual Studio 2022 version 17.10
  • Microsoft Microsoft Visual Studio 2022 version 17.8
  • Microsoft Microsoft Visual Studio 2022 version 17.11
  • Microsoft PowerShell 7.5
  • Microsoft .NET 9.0

Classification

Weakness
  • CWE-409 Improper Handling of Highly Compressed Data (Data Amplification)
  • CWE-606 Unchecked Input for Loop Condition

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.