Vulnerability Monitor

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CVE-2014-6052

The HandleRFBServerMessage function in libvncclient/rfbproto.c in LibVNCServer 0.9.9 and earlier does not check certain malloc return values, which allows remote VNC servers to cause a denial of service (application crash) or possibly execute arbitrary code by specifying a large screen size in a (1) FramebufferUpdate, (2) ResizeFrameBuffer, or (3) PalmVNCReSizeFrameBuffer message.

Security Impact Summary

CVE-2014-6052 is a security vulnerability that . Impacting 4 products from libvncserver, from oracle, from debian and 1 other, organizations running these solutions should prioritize assessment and patching.

Historical Context

Documented in 2014, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.

Published

2014-12-15T18:59:04.033

Last Modified

2025-04-12T10:46:40.837

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

6.4

Weaknesses

Type: Primary
CWE-20

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	libvncserver	libvncserver	≤ 0.9.9	Yes
Operating System	oracle	solaris	11.3	Yes
Operating System	debian	debian_linux	7.0	Yes
Operating System	canonical	ubuntu_linux	12.04	Yes
Operating System	canonical	ubuntu_linux	14.04	Yes

References

http://lists.opensuse.org/opensuse-updates/2015-12/msg00022.html ([email protected])
http://seclists.org/oss-sec/2014/q3/639 Mailing List, Third Party Advisory ([email protected])
http://secunia.com/advisories/61506 Permissions Required, Third Party Advisory ([email protected])
http://secunia.com/advisories/61682 Permissions Required, Third Party Advisory ([email protected])
http://ubuntu.com/usn/usn-2365-1 Third Party Advisory ([email protected])
http://www.debian.org/security/2014/dsa-3081 Third Party Advisory ([email protected])
http://www.ocert.org/advisories/ocert-2014-007.html Third Party Advisory, US Government Resource ([email protected])
http://www.openwall.com/lists/oss-security/2014/09/25/11 Mailing List, Third Party Advisory ([email protected])
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/70091 ([email protected])
https://github.com/newsoft/libvncserver/commit/85a778c0e45e87e35ee7199f1f25020648e8b812 Exploit, Issue Tracking, Patch ([email protected])
https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html ([email protected])
https://security.gentoo.org/glsa/201507-07 ([email protected])
https://usn.ubuntu.com/4587-1/ ([email protected])
http://lists.opensuse.org/opensuse-updates/2015-12/msg00022.html (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/oss-sec/2014/q3/639 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/61506 Permissions Required, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/61682 Permissions Required, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://ubuntu.com/usn/usn-2365-1 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2014/dsa-3081 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.ocert.org/advisories/ocert-2014-007.html Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2014/09/25/11 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/70091 (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/newsoft/libvncserver/commit/85a778c0e45e87e35ee7199f1f25020648e8b812 Exploit, Issue Tracking, Patch (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/201507-07 (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/4587-1/ (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For libvncserver's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.