Known exploited vulnerability
CVE-2017-8759
The short answer
CVE-2017-8759 affects Microsoft Corporation Microsoft .NET Framework and is rated high (CVSS 7.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2021-11-03: attackers are using it, so patch it first. The vendor has linked a patch.
What it is
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."
Weakness: CWE-94.
Severity
7.8 high
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Nov 3, 2021
Federal due date May 3, 2022
EPSS, next 30 days
89%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply updates per vendor instructions.
Affected products
Microsoft .NET Framework. NVD's record lists the exact affected versions.
References
- github.com/GitHubAssessments/CVE_Assessments_01_2020 Third Party Advisory
- github.com/bhdresh/CVE-2017-8759 ExploitThird Party Advisory
- github.com/nccgroup/CVE-2017-8759 ExploitThird Party Advisory
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8759 PatchVendor Advisory
- www.exploit-db.com/exploits/42711/ Third Party AdvisoryVDB Entry
- github.com/GitHubAssessments/CVE_Assessments_01_2020 Third Party Advisory
- github.com/bhdresh/CVE-2017-8759 ExploitThird Party Advisory
- github.com/nccgroup/CVE-2017-8759 ExploitThird Party Advisory
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8759 PatchVendor Advisory
- www.exploit-db.com/exploits/42711/ Third Party AdvisoryVDB Entry
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-8759 US Government Resource
Questions
Is CVE-2017-8759 being exploited?
Yes. CISA added CVE-2017-8759 to its Known Exploited Vulnerabilities catalog on 2021-11-03, with a federal remediation due date of 2022-05-03.
How do I fix CVE-2017-8759?
CISA's required action: Apply updates per vendor instructions.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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