CVE-2008-4770 Memory corruption in n/a

Critical 10.0 Published 16 Jan 2009 Updated 7 Aug 2024

Remote VNC servers can execute arbitrary code on clients via crafted RFB protocol data in RealVNC VNC Viewer.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2008-4770?

CVE-2008-4770 is a critical memory corruption vulnerability in n/a, published on 16 Jan 2009. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official 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."

Weakness: CWE-20

Which versions are affected by CVE-2008-4770?

It affects 1 product.

Linux distribution packages (30)

`vnc` Red Hat:enterprise_linux:3::as	All versions	`0:4.0-0.beta4.1.8`
`vnc-debuginfo` Red Hat:enterprise_linux:3::as	All versions	`0:4.0-0.beta4.1.8`
`vnc-server` Red Hat:enterprise_linux:3::as	All versions	`0:4.0-0.beta4.1.8`
`vnc` Red Hat:enterprise_linux:3::desktop	All versions	`0:4.0-0.beta4.1.8`
`vnc-debuginfo` Red Hat:enterprise_linux:3::desktop	All versions	`0:4.0-0.beta4.1.8`
`vnc-server` Red Hat:enterprise_linux:3::desktop	All versions	`0:4.0-0.beta4.1.8`
`vnc` Red Hat:enterprise_linux:3::es	All versions	`0:4.0-0.beta4.1.8`
`vnc-debuginfo` Red Hat:enterprise_linux:3::es	All versions	`0:4.0-0.beta4.1.8`
`vnc-server` Red Hat:enterprise_linux:3::es	All versions	`0:4.0-0.beta4.1.8`
`vnc` Red Hat:enterprise_linux:3::ws	All versions	`0:4.0-0.beta4.1.8`
`vnc-debuginfo` Red Hat:enterprise_linux:3::ws	All versions	`0:4.0-0.beta4.1.8`
`vnc-server` Red Hat:enterprise_linux:3::ws	All versions	`0:4.0-0.beta4.1.8`
`vnc` Red Hat:enterprise_linux:4::as	All versions	`0:4.0-12.el4_7.1`
`vnc-debuginfo` Red Hat:enterprise_linux:4::as	All versions	`0:4.0-12.el4_7.1`
`vnc-server` Red Hat:enterprise_linux:4::as	All versions	`0:4.0-12.el4_7.1`
`vnc` Red Hat:enterprise_linux:4::desktop	All versions	`0:4.0-12.el4_7.1`
`vnc-debuginfo` Red Hat:enterprise_linux:4::desktop	All versions	`0:4.0-12.el4_7.1`
`vnc-server` Red Hat:enterprise_linux:4::desktop	All versions	`0:4.0-12.el4_7.1`
`vnc` Red Hat:enterprise_linux:4::es	All versions	`0:4.0-12.el4_7.1`
`vnc-debuginfo` Red Hat:enterprise_linux:4::es	All versions	`0:4.0-12.el4_7.1`
`vnc-server` Red Hat:enterprise_linux:4::es	All versions	`0:4.0-12.el4_7.1`
`vnc` Red Hat:enterprise_linux:4::ws	All versions	`0:4.0-12.el4_7.1`
`vnc-debuginfo` Red Hat:enterprise_linux:4::ws	All versions	`0:4.0-12.el4_7.1`
`vnc-server` Red Hat:enterprise_linux:4::ws	All versions	`0:4.0-12.el4_7.1`
`vnc` Red Hat:enterprise_linux:5::client	All versions	`0:4.1.2-14.el5_3.1`
`vnc-debuginfo` Red Hat:enterprise_linux:5::client	All versions	`0:4.1.2-14.el5_3.1`
`vnc-server` Red Hat:enterprise_linux:5::client	All versions	`0:4.1.2-14.el5_3.1`
`vnc` Red Hat:enterprise_linux:5::server	All versions	`0:4.1.2-14.el5_3.1`
`vnc-debuginfo` Red Hat:enterprise_linux:5::server	All versions	`0:4.1.2-14.el5_3.1`
`vnc-server` Red Hat:enterprise_linux:5::server	All versions	`0:4.1.2-14.el5_3.1`

Products include Realvnc Realvnc.

How do I fix CVE-2008-4770?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2008-4770 being exploited?

There is no known exploitation of CVE-2008-4770 in the wild and no public exploit code.

CVE-2013-6886 Privilege escalation in n/a High 7.2

Sources

Also known as DSA-1716-1, GHSA-88j9-g2xv-54vp, RHSA-2009:0261.