CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
6.5 | $0-$5k | 0.00 |
A vulnerability was found in UltraVNC up to 1.2.2.3 (Connectivity Software). It has been classified as problematic. Affected is an unknown code block of the component VNC Client. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on availability. CVE summarizes:
UltraVNC revision 1206 has stack-based Buffer overflow vulnerability in VNC client code inside FileTransfer module, which leads to a denial of service (DoS) condition. This attack appear to be exploitable via network connectivity. This vulnerability has been fixed in revision 1207.
The bug was discovered 03/01/2019. The weakness was shared 03/08/2019 by Pavel Cheremushkin with Kaspersky Lab ICS CERT as KLCERT-19-016: UltraVNC Stack-based Buffer Overflow as confirmed advisory (Website). The advisory is available at ics-cert.kaspersky.com. The original advisory by Kaspersky has a very bad quality and consists of contradicting statements (e.g. summary and CVSS vectors). This vulnerability is traded as CVE-2019-8269 since 02/12/2019. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. The advisory points out:
UltraVNC revision 1206 has stack-based Buffer overflow vulnerability in VNC client code inside FileTransfer module, which leads to a denial of service (DoS) condition. This attack appear to be exploitable via network connectivity. This vulnerability has been fixed in revision 1207.
The vulnerability was handled as a non-public zero-day exploit for at least 7 days. During that time the estimated underground price was around $0-$5k. The advisory illustrates:
Successful exploitation of this vulnerability could allow an attacker to cause denial of service.
Upgrading to version 1.2.2.4 eliminates this vulnerability. Applying the patch Revision 1207 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 6 days after the disclosure of the vulnerability.
Further details are available at us-cert.gov. The entries 131509, 131510, 131511 and 131512 are related to this item.
Product
Type
Name
Version
- 1.0.4
- 1.0.5
- 1.0.5.1
- 1.0.8.2
- 1.0.9.5
- 1.0.9.6
- 1.0.9.6.2
- 1.1.4
- 1.1.5
- 1.1.8.0
- 1.1.8.3
- 1.1.8.4
- 1.1.8.5
- 1.1.8.6
- 1.1.8.9
- 1.1.9.0
- 1.1.9.1
- 1.1.9.3
- 1.1.9.6
- 1.2.0.1
- 1.2.0.3
- 1.2.0.4
- 1.2.0.5
- 1.2.0.6
- 1.2.0.7
- 1.2.0.9
- 1.2.1.1
- 1.2.1.2
- 1.2.1.6
- 1.2.1.7
- 1.2.2.1
- 1.2.2.2
- 1.2.2.3
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 6.8VulDB Meta Temp Score: 6.7
VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍
Researcher Base Score: 7.5
Researcher Vector: 🔍
NVD Base Score: 7.5
NVD Vector: 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Memory corruptionCWE: CWE-119
ATT&CK: Unknown
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Upgrade: UltraVNC 1.2.2.4
Patch: Revision 1207
Timeline
02/12/2019 🔍03/01/2019 🔍
03/08/2019 🔍
03/09/2019 🔍
03/14/2019 🔍
05/28/2020 🔍
Sources
Advisory: KLCERT-19-016: UltraVNC Stack-based Buffer OverflowResearcher: Pavel Cheremushkin
Organization: Kaspersky Lab ICS CERT
Status: Confirmed
CVE: CVE-2019-8269 (🔍)
Misc.: 🔍
See also: 🔍
Entry
Created: 03/09/2019 08:07Updated: 05/28/2020 22:32
Changes: 03/09/2019 08:07 (82), 05/28/2020 22:32 (1)
Complete: 🔍
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