CentOS Update for libvncserver CESA-2014:1826 centos7

Published: 2014-11-13 05:29:31
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:P/I:P/A:P

Summary:
Check the version of libvncserver

Detection Method:
Checks if a vulnerable version is present on the target host.

Technical Details:
LibVNCServer is a library that allows for easy creation of VNC server or client functionality. An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way screen sizes were handled by LibVNCServer. A malicious VNC server could use this flaw to cause a client to crash or, potentially, execute arbitrary code in the client. (CVE-2014-6051) A NULL pointer dereference flaw was found in LibVNCServer's framebuffer setup. A malicious VNC server could use this flaw to cause a VNC client to crash. (CVE-2014-6052) A NULL pointer dereference flaw was found in the way LibVNCServer handled certain ClientCutText message. A remote attacker could use this flaw to crash the VNC server by sending a specially crafted ClientCutText message from a VNC client. (CVE-2014-6053) A divide-by-zero flaw was found in the way LibVNCServer handled the scaling factor when it was set to '0'. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6054) Two stack-based buffer overflow flaws were found in the way LibVNCServer handled file transfers. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6055) Red Hat would like to thank oCERT for reporting these issues. oCERT acknowledges Nicolas Ruff as the original reporter. All libvncserver users are advised to upgrade to these updated Linux Distribution Packages, which contain backported patches to correct these issues. All running applications linked against libvncserver must be restarted for this update to take effect.

Affected Versions:
libvncserver on CentOS 7

Recommendations:
Please install the updated Linux Distribution Packages.

Detection Type:
Linux Distribution Package

Solution Type:
Vendor Patch

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2014-6051
https://nvd.nist.gov/vuln/detail/CVE-2014-6052
https://nvd.nist.gov/vuln/detail/CVE-2014-6053
https://nvd.nist.gov/vuln/detail/CVE-2014-6054
https://nvd.nist.gov/vuln/detail/CVE-2014-6055

References:

http://lists.centos.org/pipermail/centos-announce/2014-November/020758.html

Severity
High
CVSS Score
7.5
Published
2014-11-13
Modified
2019-03-08
Category
CentOS Local Security Checks

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