CVE-2019-8263
UltraVNC VNC Client Stack Buffer Overflow Denial of Service
Description
UltraVNC revision 1205 has stack-based buffer overflow vulnerability in VNC client code inside ShowConnInfo routine, which leads to a denial of service (DoS) condition. This attack appear to be exploitable via network connectivity. User interaction is required to trigger this vulnerability. This vulnerability has been fixed in revision 1206.
INFO
Published Date :
March 5, 2019, 3:29 p.m.
Last Modified :
June 28, 2021, 12:15 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.8
Affected Products
The following products are affected by CVE-2019-8263
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2019-8263.
| URL | Resource |
|---|---|
| https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf | |
| https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf | Third Party Advisory |
| https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf | |
| https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-009-ultravnc-access-of-memory-location-after-end-of-buffer/ | Not Applicable Third Party Advisory |
| https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-010-ultravnc-stack-based-buffer-overflow/ | Third Party Advisory |
| https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11 | |
| https://www.us-cert.gov/ics/advisories/icsa-20-161-06 | Third Party Advisory US Government Resource |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2019-8263 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2019-8263 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Jun. 28, 2021
Action Type Old Value New Value Added Reference https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11 [No Types Assigned] -
CVE Modified by [email protected]
May. 11, 2021
Action Type Old Value New Value Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf [No Types Assigned] Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf [No Types Assigned] -
Modified Analysis by [email protected]
Oct. 19, 2020
Action Type Old Value New Value Removed CVSS V3 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Changed Reference Type https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf No Types Assigned https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf Third Party Advisory Changed Reference Type https://www.us-cert.gov/ics/advisories/icsa-20-161-06 No Types Assigned https://www.us-cert.gov/ics/advisories/icsa-20-161-06 Third Party Advisory, US Government Resource Removed CWE NIST CWE-119 Added CWE NIST CWE-787 Added CPE Configuration OR *cpe:2.3:a:siemens:sinumerik_access_mymachine\/p2p:*:*:*:*:*:*:*:* versions up to (excluding) 4.8 *cpe:2.3:a:siemens:sinumerik_pcu_base_win10_software\/ipc:*:*:*:*:*:*:*:* versions up to (excluding) 14.00 *cpe:2.3:a:siemens:sinumerik_pcu_base_win7_software\/ipc:*:*:*:*:*:*:*:* versions up to (including) 12.01 -
CVE Modified by [email protected]
Jun. 12, 2020
Action Type Old Value New Value Added Reference https://www.us-cert.gov/ics/advisories/icsa-20-161-06 [No Types Assigned] -
CVE Modified by [email protected]
Jun. 09, 2020
Action Type Old Value New Value Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf [No Types Assigned] -
CVE Modified by [email protected]
Oct. 09, 2019
Action Type Old Value New Value Added CWE Kaspersky Labs CWE-121 -
Modified Analysis by [email protected]
Mar. 12, 2019
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Changed CVSS V2 (AV:N/AC:L/Au:N/C:P/I:P/A:P) (AV:N/AC:M/Au:N/C:N/I:N/A:P) Changed CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Changed Reference Type https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-010-ultravnc-stack-based-buffer-overflow/ No Types Assigned https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-010-ultravnc-stack-based-buffer-overflow/ Third Party Advisory Changed Reference Type https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-009-ultravnc-access-of-memory-location-after-end-of-buffer/ No Types Assigned https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-009-ultravnc-access-of-memory-location-after-end-of-buffer/ Not Applicable, Third Party Advisory Removed CWE CWE-125 Added CWE CWE-119 -
CVE Modified by [email protected]
Mar. 09, 2019
Action Type Old Value New Value Added Reference https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-009-ultravnc-access-of-memory-location-after-end-of-buffer/ [No Types Assigned] -
CVE Modified by [email protected]
Mar. 08, 2019
Action Type Old Value New Value Changed Description UltraVNC revision 1203 has out-of-bounds access vulnerability in VNC client inside RAW decoder, which can potentially result code in execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1204. UltraVNC revision 1205 has stack-based buffer overflow vulnerability in VNC client code inside ShowConnInfo routine, which leads to a denial of service (DoS) condition. This attack appear to be exploitable via network connectivity. User interaction is required to trigger this vulnerability. This vulnerability has been fixed in revision 1206. Removed Reference https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-009-ultravnc-access-of-memory-location-after-end-of-buffer/ [Third Party Advisory] Added Reference https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-010-ultravnc-stack-based-buffer-overflow/ [No Types Assigned] -
Initial Analysis by [email protected]
Mar. 06, 2019
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-009-ultravnc-access-of-memory-location-after-end-of-buffer/ No Types Assigned https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-009-ultravnc-access-of-memory-location-after-end-of-buffer/ Third Party Advisory Added CWE CWE-125 Added CPE Configuration OR *cpe:2.3:a:uvnc:ultravnc:*:*:*:*:*:*:*:* versions up to (excluding) 1.2.2.3
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2019-8263 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2019-8263
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.82 }} 0.12%
score
0.81289
percentile