Known exploited vulnerability
CVE-2023-3519
The short answer
CVE-2023-3519 affects Citrix NetScaler ADC and is rated critical (CVSS 9.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2023-07-19: attackers are using it, so patch it first.
What it is
Unauthenticated remote code execution
Weakness: CWE-94.
Severity
9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Jul 19, 2023
Federal due date Aug 9, 2023
EPSS, next 30 days
100%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Affected products
NetScaler ADC, NetScaler Gateway. NVD's record lists the exact affected versions.
References
- support.citrix.com/article/CTX561482/citrix-adc-and-citrix-gateway-security-bulletin-for-cve20233519-cve20233466-cve20233467 Vendor Advisory
- support.citrix.com/article/CTX561482/citrix-adc-and-citrix-gateway-security-bulletin-for-cve20233519-cve20233466-cve20233467 Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-3519 US Government Resource
Questions
Is CVE-2023-3519 being exploited?
Yes. CISA added CVE-2023-3519 to its Known Exploited Vulnerabilities catalog on 2023-07-19, with a federal remediation due date of 2023-08-09. CISA lists it as used in ransomware campaigns.
How do I fix CVE-2023-3519?
CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
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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