CVE-2017-8759
Exploited in the wild. In CISA KEV since 2021‑11‑03. 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
Microsoft .NET Framework 2.0, 3.5, 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2 and 4.7 allow an attacker to execute code remotely via a malicious document or application, aka ".NET Framework Remote Code Execution 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
Listed as exploited in the wild since 2021-11-03.
US federal agencies must remediate by 2022-05-03.
Apply updates per vendor instructions.
- Public exploits
3 sources with a proof of concept or module.
Exploit links, PoCs and Metasploit modules after sign-in- EPSS
89% chance of exploitation activity in the next 30 days, which ranks it in the 99th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
A public exploit existed 47 days before the patch.
- OpenVAS check added
- EPSS band changecritical → high
- Patch availablerecord updated
- Public exploit / PoCsource: exploit-db
- Added to CISA KEV
- Publishedweakness classified, att&ck mapped
Affected products
- .net frameworkOSS Libraries / generic-library
- Microsoft .NET Framework 3.5Operating Systems / windows
- Microsoft .NET Framework 3.5.1OSS Libraries / generic-library
- Microsoft .NET Framework 4.5.2OSS Libraries / generic-library
- Microsoft .NET Framework 4.6Operating Systems / windows
- Microsoft .NET Framework 4.6.1OSS Libraries / generic-library
- Microsoft .NET Framework 2.0OSS Libraries / generic-library
- Microsoft .NET Framework 4.7OSS Libraries / generic-library
And 1 more affected product. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Scored 7.8 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 NoneNo authentication required — anyone can exploit this
- 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 HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- 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
And 9 more references. See all after sign-in
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