BlueKeep scans observed from exclusively Tor exit nodes
Vulnerabilities mentionedAll →
| CVE | Vulnerability | CVSS | EPSS | Flags | Affected | Exposure | Published |
|---|---|---|---|---|---|---|---|
| CVE-2019-0708 | Unauthenticated RCE in Microsoft Remote Desktop Services (BlueKeep) CVE-2019-0708 is a use-after-free (CWE-416) vulnerability in Microsoft Remote Desktop Services, formerly Terminal Services, in which an unauthenticated attacker can connect to a target system over RDP and send specially crafted requests to trigger the flaw. Because the trigger requires no authentication, the flaw is wormable: a successful exploit grants remote code execution on the target host, potentially with elevated privileges, and could allow self-propagating attacks similar to WannaCry. Organizations running the affected Microsoft Remote Desktop Services, particularly legacy Windows releases still accepting inbound RDP connections, are in scope. Exploitation is confirmed in the wild: the flaw (nicknamed BlueKeep) is listed in CISA's KEV catalog (added 2021-11-03), CISA notes known ransomware use, and EPSS assigns it a 100% probability of exploitation within 30 days. Do: Apply Microsoft's security updates for CVE-2019-0708 per vendor instructions, prioritizing legacy or end-of-support Windows systems exposed to inbound RDP. As mitigation, restrict RDP (TCP 3389) to trusted networks or VPN access, require Network Level Authentication (NLA), and audit perimeter firewalls and public scans for open RDP listeners. The vulnerability is in the CISA KEV catalog, so patching is treated as a required action for federal and high-risk environments. | 9.8 | 100% | KEV ransomware PoC ×4 |
| masson the order of millions of internet-exposed RDP endpoints and far more internal systems |
Full article392 words · extracted from securityaffairs.com · click to collapse
GreyNoise experts detected scans for systems vulnerable to the BlueKeep (CVE-2019-0708) vulnerability from exclusively Tor exit nodes.
Microsoft Patch Tuesday updates for May 2019 address nearly 80 vulnerabilities, including an RDS vulnerability dubbed BlueKeep that can be exploited to carry out WannaCry-like attack.
The issue is a remote code execution flaw in Remote Desktop Services (RDS) that it can be exploited by an unauthenticated attacker by connecting to the targeted system via the RDP and sending specially crafted requests.
As explained by Microsoft, this vulnerability could be exploited by malware with wormable capabilities, it could be exploited without user interaction, making it possible for malware to spread in an uncontrolled way into the target networks.
Several security experts have already developed their own exploit code for this issue without publicly disclosing it for obvious reasons.
Experts at the SANS Institute observed two partial exploits that are publicly available. Chaouki Bekrar, the founder of zero-day broker firm Zerodium, explained that the flaw can be exploited remotely by an unauthenticated user to gain access to a device with SYSTEM privileges. Researchers at McAfee developed a PoC exploit that could be exploited to get remote code execution.
Other experts also announced to have successfully developed exploits for BlueKeep, including Kaspersky, Check Point, and MalwareTech.
Experts at NCC Group released detection rules for the detection of exploitation attempts for this issue. A similar
News of the day is that an attacker started scanning for Windows systems vulnerable to BlueKeep (CVE-2019-0708) vulnerability, fortunately without attempting to exploit it.
The scans were first detected on May 25, 2019, by experts at GreyNoise, a single threat actor launched them from the Tor network to hide their identities.
GreyNoise is observing sweeping tests for systems vulnerable to the RDP "BlueKeep" (CVE-2019-0708) vulnerability from several dozen hosts around the Internet. This activity has been observed from exclusively Tor exit nodes and is likely being executed by a single actor. pic.twitter.com/iGwuGuD4Rq
— GreyNoise (@GreyNoiseIO) May 25, 2019
Experts believe that it’s a matter of time until security firms will detect exploit attempts in the wild.
Thank you
| [adrotate banner=”9″] | [adrotate banner=”12″] |
(SecurityAffairs – hacking, Windows BlueKeep)
[adrotate banner=”5″]
[adrotate banner=”13″]
Text extracted automatically; images, tables and formatting may be missing. Original: https://securityaffairs.com/86193/hacking/bluekeep-flaw-scans.html