UltraVNC Viewer 1.2.2.4 - 'VNC Server' Denial of Service (PoC)

Exploit Title: UltraVNC Viewer 1.2.2.4 - Denial of Service PoC Discovery by: Victor Mondragón Discovery Date: 2019-04-14 Vendor Homepage: https://www.uvnc.com/ Software Link: https://www.uvnc.com/downloads/ultravnc/126-download-ultravnc-1224.html Tested Version: 1.2.2.4 Tested on: Windows 7 x64...

UltraVNC Access Control Error Vulnerability

UltraVNC is an open source remote terminal control software for the Windows platform. An access control error vulnerability exists in the VNC server code in UltraVNC version 1211. A remote attacker could exploit this vulnerability to execute arbitrary code...

CVE-2019-8273

UltraVNC revision 1211 has a heap buffer overflow vulnerability in VNC server code inside file transfer request handler, which can potentially result in code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1212...

CVE-2019-8274

UltraVNC revision 1211 has a heap buffer overflow vulnerability in VNC server code inside file transfer offer handler, which can potentially in result code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1212...

CVE-2019-8275

UltraVNC revision 1211 has multiple improper null termination vulnerabilities in VNC server code, which result in out-of-bound data being accessed by remote users. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1212...

CVE-2019-8277

UltraVNC revision 1211 contains multiple memory-leak vulnerabilities (CWE-665) in the VNC server code that can allow an attacker to read stack memory and, with other vulnerabilities, bypass ASLR. The issues are exploitable via network connectivity and have been fixed in revision 1212. This CVE en...

CVE-2019-8276

UltraVNC vulnerability CVE-2019-8276 affects UltraVNC server code in the file transfer request handler (revision 1211). The issue is a stack-based buffer overflow that can cause Denial of Service over the network, with a fix in revision 1212. The connected Nessus/CheckPoint entries corroborate th...

CVE-2019-8277

UltraVNC revision 1211 contains multiple memory leaks CWE-665 in VNC server code, which allows an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appears to be...

CVE-2019-8275

UltraVNC revision 1211 contains multiple improper null termination vulnerabilities in the VNC server code, allowing out-of-bounds data access via network. CVSS v3.1 base score 9.8. Affected: UltraVNC 1211; fix: upgrade to revision 1212 (addressed in the same family of issues).

CVE-2019-8276

UltraVNC revision 1211 has a stack buffer overflow vulnerability in VNC server code inside file transfer request handler, which can result in Denial of Service DoS. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1212...

CVE-2019-8271

UltraVNC revision 1211 contains a heap-based buffer overflow in the VNC server file transfer handler that could potentially allow remote code execution when exploited over the network. The issue is fixed in revision 1212; affected products are UltraVNC with the vulnerable server component, and re...

CVE-2019-8272

UltraVNC 1211 contains off-by-one vulnerabilities in the VNC server code that can potentially lead to remote code execution when exploited over a network. The issue is fixed in revision 1212. A Nessus plugin also documents other related UltraVNC CVEs (e.g., 2019-8274, 2019-8271) affecting version...

CVE-2019-8274

CVE-2019-8274 affects UltraVNC 1211 in the VNC server code’s file transfer offer handler, describing a heap-based buffer overflow that could allow remote code execution via network access. The issue is resolved in revision 1212. No exploitation details are provided beyond that it is network-explo...

CVE-2019-8277

UltraVNC revision 1211 contains multiple memory leaks CWE-665 in VNC server code, which allows an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appears to be...

Stack overflow

UltraVNC revision 1211 has a stack buffer overflow vulnerability in VNC server code inside file transfer request handler, which can result in Denial of Service DoS. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1212...

CVE-2019-8274

UltraVNC revision 1211 has a heap buffer overflow vulnerability in VNC server code inside file transfer offer handler, which can potentially in result code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1212...

CVE-2019-8277

UltraVNC revision 1211 contains multiple memory leaks CWE-665 in VNC server code, which allows an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appears to be...

CVE-2019-8275

UltraVNC revision 1211 has multiple improper null termination vulnerabilities in VNC server code, which result in out-of-bound data being accessed by remote users. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1212...

CVE-2019-8273

UltraVNC revision 1211 has a heap buffer overflow vulnerability in VNC server code inside file transfer request handler, which can potentially result in code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1212...

CVE-2019-8275

UltraVNC revision 1211 has multiple improper null termination vulnerabilities in VNC server code, which result in out-of-bound data being accessed by remote users. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1212...