Multiple buffer overflows in (a) UltraVNC (aka Ultr@VNC) 1.0.1 and earlier and (b) tabbed_viewer 1.29 (1) allow user-assisted remote attackers to execute arbitrary code via a malicious server that sends a long string to a client that connects on TCP port 5900, which triggers an overflow in Log::ReallyPrint; and (2) allow remote attackers to cause a denial of service (server crash) via a long HTTP GET request to TCP port 5800, which triggers an overflow in VNCLog::ReallyPrint
Published Apr 6, 2006
9.0
HIGHCVSS 2.0
EPSS 68.04%
Description
Multiple buffer overflows in (a) UltraVNC (aka Ultr@VNC) 1.0.1 and earlier and (b) tabbed_viewer 1.29 (1) allow user-assisted remote attackers to execute arbitrary code via a malicious server that sends a long string to a client that connects on TCP port 5900, which triggers an overflow in Log::ReallyPrint; and (2) allow remote attackers to cause a denial of service (server crash) via a long HTTP GET request to TCP port 5800, which triggers an overflow in VNCLog::ReallyPrint.
Affected products
No data.
- 1.29
- 1.0.1
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
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.
AV:N/AC:L/Au:S/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
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 (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 68.04% (0.68036) | 99.31th | v5 (v2026.06.15) |
| Jun 15, 2026 | 67.40% (0.67398) | 99.21th | v5 (v2026.06.15) |
| Mar 17, 2025 | 85.37% (0.85369) | 99.32th | v4 (v2025.03.14) |
| Dec 17, 2024 | 94.10% (0.94103) | 99.37th | v3 (v2023.03.01) |
| Feb 25, 2024 | 95.27% (0.95268) | 99.28th | v3 (v2023.03.01) |
| Dec 11, 2023 | 95.13% (0.95131) | 99.14th | v3 (v2023.03.01) |
| Oct 17, 2023 | 95.06% (0.95062) | 99.06th | v3 (v2023.03.01) |
| Aug 30, 2023 | 95.05% (0.95048) | 99.01th | v3 (v2023.03.01) |
| Jul 11, 2023 | 95.48% (0.95480) | 99.07th | v3 (v2023.03.01) |
| Apr 25, 2023 | 95.62% (0.95618) | 99.03th | v3 (v2023.03.01) |
| Mar 7, 2023 | 95.64% (0.95638) | 98.97th | v3 (v2023.03.01) |
| Mar 6, 2023 | 63.59% (0.63585) | 98.99th | v2 (v2022.01.01) |
| Feb 4, 2022 | 63.59% (0.63585) | 98.75th | v2 (v2022.01.01) |
References (12)
- http://lists.grok.org.uk/pipermail/full-disclosure/2006-April/044901.html mailing-listx_refsource_FULLDISC
- http://secunia.com/advisories/19513 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://securityreason.com/securityalert/674 third-party-advisoryx_refsource_SREASON
- http://www.securityfocus.com/archive/1/429930/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/archive/1/430287/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/archive/1/430711/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/bid/17378 vdb-entryx_refsource_BIDExploit
- http://www.vupen.com/english/advisories/2006/1240 vdb-entryx_refsource_VUPENVendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/25648 vdb-entryx_refsource_XF
- https://exchange.xforce.ibmcloud.com/vulnerabilities/25650 vdb-entryx_refsource_XF
- https://www.exploit-db.com/exploits/1642 exploitx_refsource_EXPLOIT-DB
- https://www.exploit-db.com/exploits/1643 exploitx_refsource_EXPLOIT-DB
Change history (0)
No recorded changes yet.