Veracode Vulnerability DatabaseVERACODE:6153Denial Of Service (DoS)
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
libvncserver.so is vulnerable to denial of service (DoS) attacks. The vulnerability exists due to the lack of size validation of msg.cct.legnth in the rfbProcessClientNormalMessage function of libvncserver/rfbserver.c, potentially causing a denial of service (DoS) attack.
References
www.openwall.com/lists/oss-security/2018/02/18/1
www.securityfocus.com/bid/103107
access.redhat.com/errata/RHSA-2018:1055
bugzilla.redhat.com/show_bug.cgi?id=1546858
github.com/LibVNC/libvncserver/issues/218
github.com/LibVNC/libvncserver/pull/221
github.com/ppisar/libvncserver/commit/0073e4f694d5a51bb72ff12a5e8364b6e752e094
lists.debian.org/debian-lts-announce/2018/03/msg00035.html
lists.debian.org/debian-lts-announce/2019/10/msg00042.html
lists.debian.org/debian-lts-announce/2019/11/msg00032.html
lists.debian.org/debian-lts-announce/2019/12/msg00028.html
security.gentoo.org/glsa/201908-05
usn.ubuntu.com/3618-1/
usn.ubuntu.com/4547-1/
usn.ubuntu.com/4573-1/
usn.ubuntu.com/4587-1/
www.debian.org/security/2018/dsa-4221
Related
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P