CVE-2018-7225 Integer overflow in n/a

Critical 9.8 Published 19 Feb 2018 Updated 5 Aug 2024

Attackers can trigger an integer overflow in LibVNCServer via crafted packets, leading to access to sensitive uninitialized data or service disruption.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2018-7225?

CVE-2018-7225 is a critical vulnerability in Canonical Ubuntu Linux, published on 19 Feb 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in LibVNCServer through 0.9.11. rfbProcessClientNormalMessage() in rfbserver.c does not sanitize msg.cct.length, leading to access to uninitialized and potentially sensitive data or possibly unspecified other impact (e.g., an integer overflow) via specially crafted VNC packets.

Weakness: CWE-190

Which versions are affected by CVE-2018-7225?

It affects 9 products.

Linux distribution packages (12)

`libvncserver` Red Hat:enterprise_linux:7::client	All versions	`0:0.9.9-12.el7_5`
`libvncserver-debuginfo` Red Hat:enterprise_linux:7::client	All versions	`0:0.9.9-12.el7_5`
`libvncserver-devel` Red Hat:enterprise_linux:7::client	All versions	`0:0.9.9-12.el7_5`
`libvncserver` Red Hat:enterprise_linux:7::server	All versions	`0:0.9.9-12.el7_5`
`libvncserver-debuginfo` Red Hat:enterprise_linux:7::server	All versions	`0:0.9.9-12.el7_5`
`libvncserver-devel` Red Hat:enterprise_linux:7::server	All versions	`0:0.9.9-12.el7_5`
`libvncserver` Red Hat:enterprise_linux:7::workstation	All versions	`0:0.9.9-12.el7_5`
`libvncserver-debuginfo` Red Hat:enterprise_linux:7::workstation	All versions	`0:0.9.9-12.el7_5`
`libvncserver-devel` Red Hat:enterprise_linux:7::workstation	All versions	`0:0.9.9-12.el7_5`
`LibVNCServer` SUSE:Linux Enterprise Server 11 SP4	All versions	`0.9.1-160.3.1`
`LibVNCServer` SUSE:Linux Enterprise Server for SAP Applications 11 SP4	All versions	`0.9.1-160.3.1`
`LibVNCServer` SUSE:Linux Enterprise Software Development Kit 11 SP4	All versions	`0.9.1-160.3.1`

Products include Canonical Ubuntu Linux, Debian Debian Linux, Libvncserver Project Libvncserver, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus and 3 more.

How do I fix CVE-2018-7225?

Apply the vendor's patch.

Is CVE-2018-7225 being exploited?

There is no known exploitation of CVE-2018-7225 in the wild and no public exploit code.

All Canonical Ubuntu Linux vulnerabilities

Sources

Also known as ALPINE-CVE-2018-7225, DEBIAN-CVE-2018-7225, DLA-1332-1, DSA-4221-1, GHSA-2v5x-9xhg-52hm, MGASA-2018-0198 and 4 more.