ICSA-21-131-04 Siemens SINAMICS Medium Voltage Products Remote Access (Update B)
UltraVNC revision 1198 contains multiple memory leaks in VNC client code, which could allow 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 vulnerability appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1199. UltraVNC revision 1199 has a out-of-bounds read vulnerability in VNC client RRE decoder code, caused by multiplication overflow. This vulnerability appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1200. UltraVNC revision 1199 has a out-of-bounds read vulnerability in VNC code inside client CoRRE decoder, caused by multiplication overflow. This vulnerability appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1200. UltraVNC revision 1203 has multiple heap buffer overflow vulnerabilities in VNC client code inside Ultra decoder, which could result in code execution. This vulnerability appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1204. UltraVNC revision 1205 has a stack-based buffer overflow vulnerability in VNC client code inside ShowConnInfo routine, which could lead to a denial of service (DoS) condition. This vulnerability appear to be exploitable via network connectivity. User interaction is required to trigger this vulnerability. This vulnerability has been fixed in revision 1206. UltraVNC revision 1203 has a out-of-bounds access vulnerability in VNC client inside Ultra2 decoder, which can potentially result in code execution. This vulnerability appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1204. UltraVNC revision 1207 has multiple out-of-bounds access vulnerabilities connected with improper usage of SETPIXELS macro in VNC client code, which can potentially result in code execution. This vulnerability appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1208. UltraVNC revision 1211 has multiple improper null termination vulnerabilities in VNC server code, which could result in out-of-bound data being accessed by remote users. This vulnerability appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1212. UltraVNC revision 1211 contains multiple memory leaks in VNC server code, which could allow 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 vulnerability appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1212. UltraVNC revision 1203 has out-of-bounds access vulnerability in VNC client inside RAW decoder, which can potentially result in code execution. This vulnerability appear to be exploitable via network connectivity. This vulnerability has been fixed in revision 1204. SmartVNC has a heap allocation leak vulnerability in the server Tight encoder, which could result in a Denial-of-Service condition. SmartVNC has an out-of-bounds memory access vulnerability in the device layout handler, represented by a binary data stream on client side, which can potentially result in code execution. A remote attacker could send specially crafted packets to SmartVNC device layout handler on client side, which could influence the amount of resources consumed and result in a Denial-of-Service (infinite loop) condition. SmartVNC has a heap allocation leak vulnerability in the device layout handler on client side, which could result in a Denial-of-Service condition.
CVSS v3.1 score: 7.5