High severity · published Mar 8, 2019
CVE-2019-8270
UltraVNC revision 1210 has out-of-bounds read vulnerability in VNC client code inside Ultra decoder, which results in a denial of service (DoS) condition
7.5
CVSS
1.9%
EPSS
No
On KEV
Description
UltraVNC revision 1210 has out-of-bounds read vulnerability in VNC client code inside Ultra decoder, which results in a denial of service (DoS) condition. This attack appear to be exploitable via network connectivity. This vulnerability has been fixed in revision 1211.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.9% · higher than 80% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UL
UltraVNC · Kaspersky Lab
1.2.2.3 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-8270
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-8270
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
Third Party Advisory
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-017-ultravnc-out-of-bounds-read/
www.us-cert.gov
https://www.us-cert.gov/ics/advisories/icsa-20-161-06
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