CVE-2023-21722
No known exploitation. EPSS puts it in the 58th percentile. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
.NET Framework Denial of Service Vulnerability
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.9% chance of exploitation activity in the next 30 days, which ranks it in the 58th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
8 events over 1282 days, from the signal feeds we watch.
- Patch availablerecord updated
- OpenVAS check added
- Patch availablerecord updated
- Publishedweakness classified, att&ck mapped
Affected products
- Microsoft .NET Framework 2.0 Service Pack 2OSS Libraries / generic-library
- Microsoft .NET Framework 3.0 Service Pack 2Operating Systems / windows
- Microsoft .NET Framework 3.5OSS Libraries / generic-library
- Microsoft .NET Framework 3.5 and 4.6.2OSS Libraries / generic-library
- Microsoft .NET Framework 3.5 AND 4.7.2OSS Libraries / generic-library
- Microsoft .NET Framework 3.5 AND 4.8OSS Libraries / generic-library
- Microsoft .NET Framework 3.5 AND 4.8.1OSS Libraries / generic-library
- Microsoft .NET Framework 3.5.1OSS Libraries / generic-library
And 14 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Scored 5.0 by NVD.
How it is reached
- Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required LowRequires basic user-level privileges
- User Interaction RequiredA user must click a link, open a file, or perform some action
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality NoneNo confidentiality impact
- Integrity NoneNo integrity impact
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
References in the record
- msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21722
- msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21722&
- vuldb.com/ru/?id.220997&
And 1 more reference. See all after sign-in
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