Vulnerability CVE-2018-7225
Published: 2018-02-19

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.

Type:

CWE-190

 (Integer Overflow or Wraparound)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Redhat -> Enterprise linux desktop 
Redhat -> Enterprise linux server 
Redhat -> Enterprise linux server aus 
Redhat -> Enterprise linux server eus 
Redhat -> Enterprise linux server tus 
Redhat -> Enterprise linux workstation 
Libvncserver project -> Libvncserver 
Debian -> Debian linux 
Canonical -> Ubuntu linux 

 References:
http://www.openwall.com/lists/oss-security/2018/02/18/1
http://www.securityfocus.com/bid/103107
https://access.redhat.com/errata/RHSA-2018:1055
https://github.com/LibVNC/libvncserver/issues/218
https://lists.debian.org/debian-lts-announce/2018/03/msg00035.html
https://security.gentoo.org/glsa/201908-05
https://usn.ubuntu.com/3618-1/
https://www.debian.org/security/2018/dsa-4221
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