HIGH
Multiple integer signedness errors in (1) UltraVNC 1.0.2 and 1.0.5 and (2) TightVnc 1.3.9 allow remote VNC servers to cause a denial of service (heap corruption and application crash) or possibly execute arbitrary code via a large length value in a message, related to the (a) ClientConnection::CheckBufferSize and (b) ClientConnection::CheckFileZipBufferSize functions in ClientConnection.cpp
Published Feb 4, 2009
10.0
HIGHCVSS 2.0
EPSS 13.33%
Description
Multiple integer signedness errors in (1) UltraVNC 1.0.2 and 1.0.5 and (2) TightVnc 1.3.9 allow remote VNC servers to cause a denial of service (heap corruption and application crash) or possibly execute arbitrary code via a large length value in a message, related to the (a) ClientConnection::CheckBufferSize and (b) ClientConnection::CheckFileZipBufferSize functions in ClientConnection.cpp.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
10.0 HIGH NVD
AV:N/AC:L/Au:N/C:C/I:C/A:C
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
13.33% 0.13334
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.13334
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 13.33% (0.13334) | 96.29th | v5 (v2026.06.15) |
| Jun 15, 2026 | 13.33% (0.13334) | 95.90th | v5 (v2026.06.15) |
| Mar 27, 2026 | 48.32% (0.48323) | 97.71th | v4 (v2025.03.14) |
| Feb 4, 2026 | 47.09% (0.47090) | 97.58th | v4 (v2025.03.14) |
| Apr 23, 2025 | 48.67% (0.48672) | 97.57th | v4 (v2025.03.14) |
| Mar 30, 2025 | 49.96% (0.49961) | 97.59th | v4 (v2025.03.14) |
| Mar 29, 2025 | 42.11% (0.42110) | 96.17th | v4 (v2025.03.14) |
| Mar 19, 2025 | 49.96% (0.49961) | 97.49th | v4 (v2025.03.14) |
| Mar 17, 2025 | 52.07% (0.52066) | 97.66th | v4 (v2025.03.14) |
| Jan 5, 2025 | 80.79% (0.80786) | 98.57th | v3 (v2023.03.01) |
| Dec 17, 2024 | 78.83% (0.78833) | 98.48th | v3 (v2023.03.01) |
| Dec 2, 2024 | 85.92% (0.85919) | 98.67th | v3 (v2023.03.01) |
| May 10, 2023 | 89.89% (0.89891) | 98.24th | v3 (v2023.03.01) |
| Mar 7, 2023 | 91.64% (0.91643) | 98.30th | v3 (v2023.03.01) |
| Mar 6, 2023 | 23.22% (0.23224) | 96.69th | v2 (v2022.01.01) |
| Feb 23, 2023 | 23.22% (0.23224) | 96.68th | v2 (v2022.01.01) |
| Feb 4, 2022 | 23.22% (0.23224) | 94.68th | v2 (v2022.01.01) |
Weaknesses (1)
References (10)
- http://forum.ultravnc.info/viewtopic.php?t=14654 x_refsource_CONFIRM
- http://secunia.com/advisories/33807 third-party-advisoryx_refsource_SECUNIA
- http://vnc-tight.svn.sourceforge.net/viewvc/vnc-tight?view=rev&revision=3564 x_refsource_CONFIRM
- http://www.coresecurity.com/content/vnc-integer-overflows x_refsource_MISCExploit
- http://www.securityfocus.com/archive/1/500632/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/bid/33568 vdb-entryx_refsource_BIDExploitPatch
- http://www.vupen.com/english/advisories/2009/0321 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2009/0322 vdb-entryx_refsource_VUPEN
- https://www.exploit-db.com/exploits/7990 exploitx_refsource_EXPLOIT-DB
- https://www.exploit-db.com/exploits/8024 exploitx_refsource_EXPLOIT-DB
| Link | Providers | Tags |
|---|---|---|
| http://forum.ultravnc.info/viewtopic.php?t=14654 | x_refsource_CONFIRM | |
| http://secunia.com/advisories/33807 | third-party-advisoryx_refsource_SECUNIA | |
| http://vnc-tight.svn.sourceforge.net/viewvc/vnc-tight?view=rev&revision=3564 | x_refsource_CONFIRM | |
| http://www.coresecurity.com/content/vnc-integer-overflows | x_refsource_MISCExploit | |
| http://www.securityfocus.com/archive/1/500632/100/0/threaded | mailing-listx_refsource_BUGTRAQ | |
| http://www.securityfocus.com/bid/33568 | vdb-entryx_refsource_BIDExploitPatch | |
| http://www.vupen.com/english/advisories/2009/0321 | vdb-entryx_refsource_VUPEN | |
| http://www.vupen.com/english/advisories/2009/0322 | vdb-entryx_refsource_VUPEN | |
| https://www.exploit-db.com/exploits/7990 | exploitx_refsource_EXPLOIT-DB | |
| https://www.exploit-db.com/exploits/8024 | exploitx_refsource_EXPLOIT-DB |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Feb 4, 2009
Updated Aug 7, 2024
Reserved Feb 2, 2009
Link CVE-2009-0388
CISA Vulnrichment
Updated n/a