Security News > 2023 > November > LockBit ransomware exploits Citrix Bleed in attacks, 10K servers exposed
The Lockbit ransomware attacks use publicly available exploits for the Citrix Bleed vulnerability to breach the systems of large organizations, steal data, and encrypt files.
Although Citrix made fixes available for CVE-2023-4966 more than a month ago, thousands of internet-exposed endpoints are still running vulnerable appliances, many in the U.S. High-profile Lockbit attacks.
These are exposed Citrix servers [1, 2] vulnerable to the Citrix Bleed flaw, which he says the LockBit ransomware gang is exploiting attacks.
These attacks are likely being conducted by a LockBit affiliate who is heavily utilizing this vulnerability to breach networks rather than the ransomware operation itself being behind the attack.
A GandCrab/REvil affiliate specialized in exploiting MSP software [1, 2, 3] to encrypt companies, and we are likely seeing a LockBit affiliate utilizing the Citrix Bleed flaw to mass-breach networks.
Hackers use Citrix Bleed flaw in attacks on govt networks worldwide.
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Related Vulnerability
| DATE | CVE | VULNERABILITY TITLE | RISK |
|---|---|---|---|
| 2023-10-10 | CVE-2023-4966 | Unspecified vulnerability in Citrix products Sensitive information disclosure in NetScaler ADC and NetScaler Gateway when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA ?virtual?server. | 7.5 |