Vulnerability Details : CVE-2019-8280
UltraVNC revision 1203 has out-of-bounds access vulnerability in VNC client inside RAW decoder, which can potentially result code execution. This attack appear to be exploitable via network connectivity. This vulnerability has been fixed in revision 1204.
Vulnerability category: Memory Corruption
Products affected by CVE-2019-8280
- cpe:2.3:a:uvnc:ultravnc:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-8280
0.75%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 81 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-8280
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
9.8
|
CRITICAL | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2019-8280
-
The product reads data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
-
The product reads or writes to a buffer using an index or pointer that references a memory location after the end of the buffer.Assigned by: vulnerability@kaspersky.com (Secondary)
References for CVE-2019-8280
-
https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11
Siemens SIMATIC UltraVNC HMI WinCC Products | CISA
-
https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf
-
https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf
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https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-009-ultravnc-access-of-memory-location-after-end-of-buffer/
KLCERT-19-009: UltraVNC Access of Memory Location After End of Buffer | Kaspersky Lab ICS CERTThird Party Advisory
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https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
-
https://www.us-cert.gov/ics/advisories/icsa-20-161-06
Siemens SINUMERIK | CISA
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