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CVE-2008-4770

The CMsgReader::readRect function in the VNC Viewer component in RealVNC VNC Free Edition 4.0...

10.0 HighFix available

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."

Exploit likelihood

4.05%Down 0.4 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 10.0

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."

Record
CVE-2008-4770
CVSS 2.0
10.0 HighAV:N/AC:L/Au:N/C:C/I:C/A:C
Weakness
CWE-20
Updated
2026-11-02
CVE List No score

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."

Record
CVE-2008-4770
Updated
2026-11-02
EUVDEUVD-2008-4750 No score

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."

Record
EUVD-2008-4750
Updated
2026-11-03
GitHub AdvisoriesGHSA-88j9-g2xv-54vp No score

The CMsgReader::readRect function in the VNC Viewer component in RealVNC VNC Free Edition 4.0...

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."

Record
GHSA-88j9-g2xv-54vp
Weakness
CWE-20
Updated
2026-11-02
OSV No score

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."

Record
CVE-2008-4770
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
vnc4
Debian:4.0
 before 4.1.1+X4.3.0-21+etch1, plus listed versions
4.1.1+X4.3.0-21
4.1.1+X4.3.0-21+etch1
vnc
Red Hat:enterprise_linux:3::as
 before 0:4.0-0.beta4.1.8
0:4.0-0.beta4.1.8
vnc-debuginfo
Red Hat:enterprise_linux:3::as
 before 0:4.0-0.beta4.1.8
0:4.0-0.beta4.1.8
vnc-server
Red Hat:enterprise_linux:3::as
 before 0:4.0-0.beta4.1.8
0:4.0-0.beta4.1.8
vnc
Red Hat:enterprise_linux:3::desktop
 before 0:4.0-0.beta4.1.8
0:4.0-0.beta4.1.8
vnc-debuginfo
Red Hat:enterprise_linux:3::desktop
 before 0:4.0-0.beta4.1.8
0:4.0-0.beta4.1.8
vnc-server
Red Hat:enterprise_linux:3::desktop
 before 0:4.0-0.beta4.1.8
0:4.0-0.beta4.1.8
vnc
Red Hat:enterprise_linux:3::es
 before 0:4.0-0.beta4.1.8
0:4.0-0.beta4.1.8
vnc-debuginfo
Red Hat:enterprise_linux:3::es
 before 0:4.0-0.beta4.1.8
0:4.0-0.beta4.1.8
vnc-server
Red Hat:enterprise_linux:3::es
 before 0:4.0-0.beta4.1.8
0:4.0-0.beta4.1.8
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Affected packages
PackageAffectedFixed
vnc
Red Hat:enterprise_linux:3::ws
 before 0:4.0-0.beta4.1.8
0:4.0-0.beta4.1.8
vnc-debuginfo
Red Hat:enterprise_linux:3::ws
 before 0:4.0-0.beta4.1.8
0:4.0-0.beta4.1.8
vnc-server
Red Hat:enterprise_linux:3::ws
 before 0:4.0-0.beta4.1.8
0:4.0-0.beta4.1.8
vnc
Red Hat:enterprise_linux:4::as
 before 0:4.0-12.el4_7.1
0:4.0-12.el4_7.1
vnc-debuginfo
Red Hat:enterprise_linux:4::as
 before 0:4.0-12.el4_7.1
0:4.0-12.el4_7.1
vnc-server
Red Hat:enterprise_linux:4::as
 before 0:4.0-12.el4_7.1
0:4.0-12.el4_7.1
vnc
Red Hat:enterprise_linux:4::desktop
 before 0:4.0-12.el4_7.1
0:4.0-12.el4_7.1
vnc-debuginfo
Red Hat:enterprise_linux:4::desktop
 before 0:4.0-12.el4_7.1
0:4.0-12.el4_7.1
vnc-server
Red Hat:enterprise_linux:4::desktop
 before 0:4.0-12.el4_7.1
0:4.0-12.el4_7.1
vnc
Red Hat:enterprise_linux:4::es
 before 0:4.0-12.el4_7.1
0:4.0-12.el4_7.1
vnc-debuginfo
Red Hat:enterprise_linux:4::es
 before 0:4.0-12.el4_7.1
0:4.0-12.el4_7.1
vnc-server
Red Hat:enterprise_linux:4::es
 before 0:4.0-12.el4_7.1
0:4.0-12.el4_7.1
vnc
Red Hat:enterprise_linux:4::ws
 before 0:4.0-12.el4_7.1
0:4.0-12.el4_7.1
vnc-debuginfo
Red Hat:enterprise_linux:4::ws
 before 0:4.0-12.el4_7.1
0:4.0-12.el4_7.1
vnc-server
Red Hat:enterprise_linux:4::ws
 before 0:4.0-12.el4_7.1
0:4.0-12.el4_7.1
vnc
Red Hat:enterprise_linux:5::client
 before 0:4.1.2-14.el5_3.1
0:4.1.2-14.el5_3.1
vnc-debuginfo
Red Hat:enterprise_linux:5::client
 before 0:4.1.2-14.el5_3.1
0:4.1.2-14.el5_3.1
vnc-server
Red Hat:enterprise_linux:5::client
 before 0:4.1.2-14.el5_3.1
0:4.1.2-14.el5_3.1
vnc
Red Hat:enterprise_linux:5::server
 before 0:4.1.2-14.el5_3.1
0:4.1.2-14.el5_3.1
vnc-debuginfo
Red Hat:enterprise_linux:5::server
 before 0:4.1.2-14.el5_3.1
0:4.1.2-14.el5_3.1
vnc-server
Red Hat:enterprise_linux:5::server
 before 0:4.1.2-14.el5_3.1
0:4.1.2-14.el5_3.1

History

History
RecordedChangedSources
affected
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2008-4770 is a high vulnerability (CVSS 10.0) in Realvnc, published January 16, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.05%, the 90th percentile. Fixed in vnc4 4.1.1+X4.3.0-21+etch1.

References

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