vnc: vncviewer insufficient encoding value validation in CMsgReader::readRect
Published Jan 16, 2009
10.0
HIGHCVSS 2.0
EPSS 4.05%
Description
The CMsgReader::readRect function in the VNC Viewer component in RealVNC VNC Free Edition 4.0 through 4.1.2, Enterprise Edition E4.0 through E4.4.2, and Personal Edition P4.0 through P4.4.2 allows remote VNC servers to execute arbitrary code via crafted RFB protocol data, related to "encoding type."
Affected products
No data.
No data.
Red Hat Enterprise Linux 3
vnc-0:4.0-0.beta4.1.8
Fixed · RHSA-2009:0261
Red Hat Enterprise Linux 4
vnc-0:4.0-12.el4_7.1
Fixed · RHSA-2009:0261
Red Hat Enterprise Linux 5
vnc-0:4.1.2-14.el5_3.1
Fixed · RHSA-2009:0261
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 3 | vnc-0:4.0-0.beta4.1.8 | Fixed | RHSA-2009:0261 |
| Red Hat Enterprise Linux 4 | vnc-0:4.0-12.el4_7.1 | Fixed | RHSA-2009:0261 |
| Red Hat Enterprise Linux 5 | vnc-0:4.1.2-14.el5_3.1 | Fixed | RHSA-2009:0261 |
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:N/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 (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.05% (0.04052) | 90.33th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.05% (0.04052) | 89.29th | v5 (v2026.06.15) |
| Jun 8, 2026 | 4.74% (0.04736) | 89.61th | v4 (v2025.03.14) |
| Jun 15, 2025 | 5.82% (0.05820) | 90.05th | v4 (v2025.03.14) |
| Mar 30, 2025 | 8.62% (0.08620) | 91.60th | v4 (v2025.03.14) |
| Mar 29, 2025 | 11.77% (0.11766) | 89.47th | v4 (v2025.03.14) |
| Mar 19, 2025 | 8.62% (0.08620) | 91.36th | v4 (v2025.03.14) |
| Mar 17, 2025 | 6.93% (0.06934) | 90.74th | v4 (v2025.03.14) |
| Jan 22, 2025 | 6.23% (0.06234) | 93.57th | v3 (v2023.03.01) |
| Dec 17, 2024 | 4.91% (0.04911) | 92.69th | v3 (v2023.03.01) |
| Mar 7, 2023 | 7.65% (0.07650) | 93.09th | v3 (v2023.03.01) |
| Mar 6, 2023 | 4.42% (0.04421) | 88.21th | v2 (v2022.01.01) |
| Apr 1, 2022 | 4.42% (0.04421) | 87.03th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.42% (0.04421) | 70.83th | v2 (v2022.01.01) |
References (21)
- http://secunia.com/advisories/32317 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/33689 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/34184 third-party-advisoryx_refsource_SECUNIA
- http://sunsolve.sun.com/search/document.do?assetkey=1-21-140455-01-1 x_refsource_CONFIRMPatchVendor Advisory
- http://sunsolve.sun.com/search/document.do?assetkey=1-26-248526-1 vendor-advisoryx_refsource_SUNALERTVendor Advisory
- http://www.gentoo.org/security/en/glsa/glsa-200903-17.xml vendor-advisoryx_refsource_GENTOO
- http://www.realvnc.com/pipermail/vnc-list/2008-November/059432.html mailing-listx_refsource_MLIST
- http://www.realvnc.com/products/free/4.1/release-notes.html x_refsource_CONFIRM
- http://www.realvnc.com/products/upgrade.html x_refsource_CONFIRMVendor Advisory
- http://www.redhat.com/support/errata/RHSA-2009-0261.html vendor-advisoryx_refsource_REDHAT
- http://www.securityfocus.com/bid/31832 vdb-entryx_refsource_BID
- http://www.securityfocus.com/bid/33263 vdb-entryx_refsource_BID
- http://www.vupen.com/english/advisories/2008/2868 vdb-entryx_refsource_VUPEN
- https://access.redhat.com/security/cve/CVE-2008-4770 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=480590 Issue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/45969 vdb-entryx_refsource_XF
- https://exchange.xforce.ibmcloud.com/vulnerabilities/47937 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2008-4770
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9367 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2008-4770
- https://www.redhat.com/archives/fedora-package-announce/2009-January/msg01025.html vendor-advisoryx_refsource_FEDORA
Change history (0)
No recorded changes yet.