Security News

Over 15K Citrix servers likely vulnerable to CVE-2023-3519 attacks
2023-07-22 14:07

Thousands of Citrix Netscaler ADC and Gateway servers exposed online are likely vulnerable against a critical remote code execution bug exploited by unauthenticated attackers in the wild as a zero-day. "We tag all IPs where we see a version hash in a Citrix instance. This is due fact that Citrix has removed version hash information in recent revisions," Shadowserver said.

CISA: Citrix RCE bug exploited to breach critical infrastructure org
2023-07-21 12:51

Threat actors have breached the network of a U.S. organization in the critical infrastructure sector after exploiting a zero-day RCE vulnerability currently identified as CVE-2023-3519, a critical-severity issue in NetScaler ADC and Gateway that Citrix patched this week.Because the targeted NetScaler ADC appliance was in a segregated environment on the network, the hackers were not able to move laterally to a domain controller, CISA says.

Citrix ADC zero-day exploitatation: CISA releases details about attack on CI organization (CVE-2023-3519)
2023-07-21 11:07

The exploitation of the Citrix NetScaler ADC zero-day vulnerability was first spotted by a critical infrastructure organization, who reported it to the Cybersecurity and Infrastructure Security Agency. "In June 2023, threat actors exploited this vulnerability as a zero-day to drop a webshell on a critical infrastructure organization's non-production environment NetScaler ADC appliance. The webshell enabled the actors to perform discovery on the victim's active directory and collect and exfiltrate AD data. The actors attempted to move laterally to a domain controller but network-segmentation controls for the appliance blocked movement," the agency shared in an advisory published on Thursday.

Citrix NetScaler ADC and Gateway Devices Under Attack: CISA Urges Immediate Action
2023-07-21 05:26

The U.S. Cybersecurity and Infrastructure Security Agency issued an advisory on Thursday warning that the newly disclosed critical security flaw in Citrix NetScaler Application Delivery Controller and Gateway devices is being abused to drop web shells on vulnerable systems. "In June 2023, threat actors exploited this vulnerability as a zero-day to drop a web shell on a critical infrastructure organization's non-production environment NetScaler ADC appliance," the agency said.

Citrix NetScaler zero-day exploited in the wild, patch is available (CVE-2023-3519)
2023-07-19 09:30

Citrix has patched three vulnerabilities in NetScaler ADC and NetScaler Gateway, one of which is a zero-day being exploited by attackers. In early 2022, the company reported the exploitation of a RCE vulnerability in its Citrix ADC deployments by a Chinese state-sponsored group.

Zero-Day Attacks Exploited Critical Vulnerability in Citrix ADC and Gateway
2023-07-19 03:21

Citrix is alerting users of a critical security flaw in NetScaler Application Delivery Controller and Gateway that it said is being actively exploited in the wild.The company did not give further details on the flaw tied to CVE-2023-3519 other than to say that exploits for the flaw have been observed on "Unmitigated appliances." However, successful exploitation requires the device to be configured as a Gateway or authorization and accounting virtual server.

New critical Citrix ADC and Gateway flaw exploited as zero-day
2023-07-18 18:00

Citrix today is alerting customers of a critical-severity vulnerability in NetScaler ADC and NetScaler Gateway that already has exploits in the wild, and "Strongly urges" to install updated versions without delay. Formerly Citrix ADC and Citrix Gateway, the two NetScaler products received new versions today to mitigate a set of three vulnerabilities.

New critical Citrix ADC and Gateway flaw exploited as zero-days
2023-07-18 18:00

Citrix today is alerting customers of a critical-severity vulnerability in NetScaler ADC and NetScaler Gateway that already has exploits in the wild, and "Strongly urges" to install updated versions without delay. Formerly Citrix ADC and Citrix Gateway, the two NetScaler products received new versions today to mitigate a set of three vulnerabilities.

Citrix ADC and Gateway zero-day actively exploited in attacks
2023-07-18 18:00

Citrix today is alerting customers of a critical-severity vulnerability in NetScaler ADC and NetScaler Gateway that already has exploits in the wild, and "Strongly urges" to install updated versions without delay. Formerly Citrix ADC and Citrix Gateway, the two NetScaler products received new versions today to mitigate a set of three vulnerabilities.

Citrix fixes severe flaws in Workspace, Virtual Apps and Desktops
2023-02-15 18:38

Citrix Systems has released security updates for vulnerabilities in its Virtual Apps and Desktops, and Workspace Apps products. Citrix products are widely used by organizations worldwide, so it's critical to apply the available security updates to prevent intruders from having an easy way to escalate their privileges on breached systems.