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9.8
CRITICAL CVSS 3.0
CVE-2019-8264
UltraVNC VNC Client Out-of-Bounds Access Buffer Overflow
Description

UltraVNC revision 1203 has out-of-bounds access vulnerability in VNC client inside Ultra2 decoder, which can potentially result in code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1204.

INFO

Published Date :

March 8, 2019, 11:29 p.m.

Last Modified :

Nov. 21, 2024, 4:49 a.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2019-8264 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.

ID Vendor Product Action
1 Uvnc ultravnc
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 HIGH [email protected]
CVSS 3.0 CRITICAL [email protected]
Solution
This information is provided by the 3rd party feeds.
  • Upgrade to UltraVNC version 1.2.2.4 or later.
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-2019-8264.

URL Resource
https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-011-ultravnc-access-of-memory-location-after-end-of-buffer/ 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
https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-011-ultravnc-access-of-memory-location-after-end-of-buffer/ 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
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2019-8264 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-2019-8264 weaknesses.

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-2019-8264 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2019-8264 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 af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf
    Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
    Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf
    Added Reference https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-011-ultravnc-access-of-memory-location-after-end-of-buffer/
    Added Reference https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11
    Added Reference https://www.us-cert.gov/ics/advisories/icsa-20-161-06
  • 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]
  • 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-788
  • Initial Analysis by [email protected]

    Mar. 11, 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-19-011-ultravnc-access-of-memory-location-after-end-of-buffer/ No Types Assigned https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-011-ultravnc-access-of-memory-location-after-end-of-buffer/ Third Party Advisory
    Added CWE CWE-125
    Added CWE CWE-787
    Added CPE Configuration OR *cpe:2.3:a:uvnc:ultravnc:*:*:*:*:*:*:*:* versions up to (excluding) 1.2.2.3
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 9.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 7.5
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

1.74 }} 0.72%

score

0.80874

percentile