CVE-2019-19781

Description

An issue was discovered in Citrix Application Delivery Controller (ADC) and Gateway 10.5, 11.1, 12.0, 12.1, and 13.0. They allow Directory Traversal.

From the Tenable Blog

CVE-2019-19781: Critical Vulnerability in Citrix ADC and Gateway Sees Active Exploitation While Patches are Still Not Available

Published: 2020-01-17

Following the release of exploit scripts for a critical flaw in Citrix Application Delivery Controller (ADC) and Gateway, attackers launch attacks against vulnerable hosts, while Citrix announces release date for patches UPDATE 01/24/2020: This blog post has been updated to reflect the availability of patches released by Citrix. Background Attacks Increase After Exploit Scripts Released

CVE-2019-19781: Exploit Scripts for Remote Code Execution Vulnerability in Citrix ADC and Gateway Available

Published: 2020-01-11

Attackers are actively probing for vulnerable Citrix Application Delivery Controller (ADC) and Gateway hosts, while multiple proof-of-concept scripts are released, emphasizing the importance of mitigating this flaw immediately.

CVE-2019-19781: Unauthenticated Remote Code Execution Vulnerability in Citrix ADCs and Gateways

Published: 2019-12-23

Citrix urges customers to apply mitigation steps for CVE-2019-19781, a remote code execution vulnerability exploitable through specially crafted HTTP requests to vulnerable devices.

References

https://www.tenable.com/blog/from-bugs-to-breaches-25-significant-cves-as-mitre-cve-turns-25

https://www.tenable.com/blog/aa24-241a-joint-cybersecurity-advisory-on-iran-based-cyber-actors-targeting-us-organizations

https://www.cisa.gov/news-events/cybersecurity-advisories/aa24-241a

https://www.tenable.com/blog/cve-2023-4966-citrix-netscaler-adc-and-netscaler-gateway-information-disclosure-exploited-in

https://www.tenable.com/blog/aa23-215a-2022s-top-routinely-exploited-vulnerabilities

https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-215a

https://www.tenable.com/blog/cve-2023-3519-critical-rce-in-netscaler-adc-citrix-adc-and-netscaler-gateway-citrix-gateway

https://www.tenable.com/cyber-exposure/tenable-2022-threat-landscape-report

https://www.tenable.com/blog/cisa-top-20-cves-exploited-peoples-republic-of-china-state-sponsored-actors-aa22-279a

https://www.tenable.com/cyber-exposure/a-look-inside-the-ransomware-ecosystem

https://www.cisa.gov/news-events/cybersecurity-advisories/aa22-117a

https://www.tenable.com/blog/government-advisories-warn-of-apt-activity-resulting-from-russian-invasion-of-ukraine

https://www.tenable.com/cyber-exposure/2021-threat-landscape-retrospective

https://www.tenable.com/blog/examining-the-treat-landscape

https://web.archive.org/web/20211025233339/https://twitter.com/pancak3lullz/status/1452679527197560837

https://www.cisa.gov/news-events/cybersecurity-advisories/aa21-209a

https://www.tenable.com/blog/one-year-later-what-can-we-learn-from-zerologon

https://www.tenable.com/blog/healthcare-security-ransomware-plays-a-prominent-role-in-covid-19-era-breaches

https://www.tenable.com/blog/cve-2021-21972-vmware-vcenter-server-remote-code-execution-vulnerability

https://www.cisa.gov/news-events/cybersecurity-advisories/aa20-296a

https://www.tenable.com/blog/government-agencies-warn-of-state-sponsored-actors-exploiting-publicly-known-vulnerabilities

https://media.defense.gov/2020/Oct/20/2002519884/-1/-1/0/CSA_CHINESE_EXPLOIT_VULNERABILITIES_UOO179811.PDF

https://www.tenable.com/blog/cve-2020-5135-critical-sonicwall-vpn-portal-stack-based-buffer-overflow-vulnerability

https://www.tenable.com/blog/us-cybersecurity-agency-cisa-alert-foreign-threat-actors-target-unpatched-vulnerabilities

https://www.cisa.gov/news-events/cybersecurity-advisories/aa20-259a

https://www.tenable.com/blog/cve-2019-19781-critical-vulnerability-in-citrix-adc-and-gateway-sees-active-exploitation-while

https://www.tenable.com/blog/cve-2020-3452-cisco-adaptive-security-appliance-and-firepower-threat-defense-path-traversal

https://www.tenable.com/blog/cve-2020-2021-palo-alto-networks-pan-os-vulnerable-to-critical-authentication-bypass

https://www.cisa.gov/news-events/cybersecurity-advisories/aa20-133a

https://www.tenable.com/blog/critical-vulnerabilities-you-need-to-find-and-fix-to-protect-the-remote-workforce

https://www.tenable.com/blog/how-covid-19-response-is-expanding-the-cyberattack-surface

https://www.mandiant.com/resources/blog/apt41-initiates-global-intrusion-campaign-using-multiple-exploits

https://www.mandiant.com/resources/blog/nice-try-501-ransomware-not-implemented

https://www.bleepingcomputer.com/news/security/citrix-releases-final-patch-as-ransomware-attacks-ramp-up/

https://www.tenable.com/blog/cve-2019-19781-unauthenticated-remote-code-execution-vulnerability-in-citrix-adcs-and-gateways

https://www.kb.cert.org/vuls/id/619785

https://twitter.com/bad_packets/status/1215431625766424576

https://support.citrix.com/article/CTX267027

https://forms.gle/eDf3DXZAv96oosfj6

https://badpackets.net/over-25000-citrix-netscaler-endpoints-vulnerable-to-cve-2019-19781/

http://packetstormsecurity.com/files/155972/Citrix-ADC-Gateway-Path-Traversal.html

http://packetstormsecurity.com/files/155947/Citrix-ADC-NetScaler-Directory-Traversal-Remote-Code-Execution.html

http://packetstormsecurity.com/files/155930/Citrix-Application-Delivery-Controller-Gateway-10.5-Remote-Code-Execution.html

http://packetstormsecurity.com/files/155905/Citrix-Application-Delivery-Controller-Gateway-Remote-Code-Execution-Traversal.html

http://packetstormsecurity.com/files/155904/Citrix-Application-Delivery-Controller-Gateway-Remote-Code-Execution.html

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3